Trace minerals are essential to maintaining health and productivity in livestock animals. Traditionally, trace minerals were fed based on the minimum level required to overcome a deficiency symptom and not necessarily to promote productivity. Feeding adequate amounts and sources of trace minerals is essential to optimize production, health and feed costs and to minimize effects on the environment.

The growing uncertainties associated with trace mineral requirements and supply puts nutritionists in the dilemma of balancing the costs of either underfeeding or overfeeding trace minerals. A deficiency will impair health in dairy cows, leading to problems such as retained placenta and mastitis, and can decrease reproduction and lactation performance. On the other hand, excess supply will inflate feed costs and increase the risk of environmental pollution and toxicity, and it may also result in unwanted antagonistic interactions among minerals, leading to poor absorption.

Dietary trace minerals are supplied from feedstuffs and mineral supplements. The National Research Council (NRC) requirements are based on both sources of trace minerals, accounting for their absorption coefficients. Feed trace minerals usually have lower absorption coefficients compared with supplements. Furthermore, mineral supplements differ in their bioavailability. The NRC (2001) requirements appear to be adequate for most minerals, except for manganese and cobalt, for which new data suggests higher concentrations.

Inorganic minerals generally have lower bioavailability compared with organic minerals. Inorganic minerals become free in the rumen and can interact with other feed components. They can also bind to other minerals and pass through the gastrointestinal tract unabsorbed. Inorganic minerals may also include a source of contaminants, such as the heavy metals cadmium and lead. The presence of inorganic trace minerals in premix feeds can negatively affect the stability of enzymes and vitamins. To circumvent these bioavailability and absorption uncertainties, inorganic minerals are often supplemented at multiples of NRC requirements, which may further reduce their absorption and may reduce animal health and performance.

The Total Replacement Technology™ (TRT) mineral program at Alltech offers trace minerals (Bioplex®, Sel-Plex®) to provide highly available and traceable sources of minerals that support the animal’s requirements.

Most lactation diets will supply adequate to excessive amounts of iron, while other trace minerals will be supplied at amounts below NRC requirements, ranging from 40 percent to 85 percent. The TRT program should accommodate most situations but may need to be adjusted for specific situations in which extreme dietary concentrations are found. Regular assessment of trace mineral levels in forages is critical to building a more efficient mineral nutrition program.

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By Brian Springer, CCA

Sixty percent of a dairy cow’s diet is forage. With so much of the diet dependent on the nutrients a cow receives from forage, it is important to make sure the crop reaches its nutrient and energy potential. Nitrogen, phosphorus and potassium, the major components of fertilizer, are essential for soil nutrient content and are controlled by pH. We test and fertilize for these nutrients regularly, and they are often the first place we look for a solution if a problem arises in crop health.

However, critical elements — like calcium, magnesium, and sulfur — are often seen as secondary in importance in terms of soil content, and, in turn, plant health. For example, with current industry practices, recent findings show that sulfur deficiency of 10 to 20 pounds per acre is common in much of the United States. Of these elements, sulfur in particular might be the missing piece in your forage puzzle as it increases nutrient quality and aids in balancing the microflora in the rumen.

What is sulfur?  

Sulfur is one of the 17 elements essential to crop production. This is because, according to the International Plant Nutrition Institute, plants almost exclusively use sulfate as their primary source of nutrition. It can be found in high levels in salt domes and volcanic deposits, typically in its elemental form. But it is also present in almost all soil types in smaller quantities.

Plants receive sulfur through two primary mediums:

• Soil: The sulfur found in soil is typically organic sulfate that has been converted from elemental sulfur by soil bacteria. Ninety-five percent of plant sulfur uptake is in the organic form of sulfate.

• Air: Inorganic sulfur dioxide is often absorbed through the leaves and stoma.  

What role does sulfur play in forage plant and dairy cow processes?

Required by both plants and animals, sulfur appears in every living cell and is essential for the synthesis of certain amino acids and proteins.

A deficiency of sulfur in the soil can lead to deficiencies in the cow. Nutritionists recommend 0.2 percent of sulfur or sulfate in the diet of cattle, and ensuring your forage has enough sulfur is the easiest and most cost-effective way to manage sulfur requirements for the ration. Most of the dietary sulfur required by the cow is actually utilized by the rumen microbes for amino acid production. By feeding the microbes, the cow can produce amino acids, enzymes and proteins that then contribute to cow health, milk production and quality.

Not only will the sulfate aid the cow, but plants use sulfate for chlorophyll formation, which contributes to higher sugar content and nutrients, resulting in greener, fuller foliage.

What does our current sulfur landscape look like?

In recent years, there has been a decrease in soil sulfur content as well as an increased demand on the soil for higher crop yields, and the fact that many fertilizers contain little to no sulfur is the primary reason for our current depletion of sulfur in the top soil. Secondary causes include erosion and mineralization.

How to recognize a sulfur deficiency

Since high-yielding crops often don’t receive adequate amounts of sulfur or receive it at inopportune times, it is important to be able to recognize a sulfur deficiency. Thankfully, if presented in its organic form, sulfate can quickly be absorbed in two to three days, which helps avoid leaching as you fertilize. If you notice some of the following signs of sulfate deficiency, it is recommended to provide a sulfur treatment two to four days before cutting forage to increase chlorophyll, resulting in a fuller, energy-rich harvest.  This short-term solution can be done by applying biostimulant products, as a sulfur application would need to take place much earlier in order to keep the plant healthy and growing well. Signs of sulfur deficiency include:

• Yellowing of young growth; yellowing of old growth indicates a nitrogen shortage.

• Curling of young leaves.

• Diminished foliage.

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Photo is provided courtesy of the International Plant Nutrition Institute (IPNI).

Although sulfur is present in the soil, it is often below recommended standards. Furthermore, in its inorganic sulfur state, it cannot be properly taken up by the plant until it has been converted to organic sulfate. By checking your forage crop for sulfur deficiency and treating as needed, you can increase the sugar and nutrient quality of your forage and provide sulfur to your herd to support rumen microflora health.

Have a question or comment?

Gene Goenner is a technical dairy expert with Alltech. Below is an edited transcript of his recorded comments on optimizing feedstuffs. 

Watch the full video here:

I want to talk to you a little bit today about feedstuffs: in particular, different ingredients and total mixed rations. We know that a herd’s diet is made up of multiple ingredients. For example, when we have a grain mix, a nutritionist is going to add up to 30 different ingredients that will mix together into a balanced diet for the animal.

A cow at a high production level is going to have the ability to consume approximately 50–60 pounds of the feedstuff a day. She has an outstanding ability for taste and smell, much better than we as humans have, so we are balancing this diet with all of these different ingredients to create a diet that is not only nutritionally balanced, but also palatable.

Maximize performance

When nutritionists look at a diet, we try to figure out the cow’s production level. This includes her milking performance, her reproduction performance and maximizing her overall health. Making a high-quality, balanced diet for a healthy animal will help her to perform, do well on a farm and be profitable for the producer.

TMRs

One of the problems we have when feeding a ration is that we include feed ingredients that animals prefer, and they will sort through to find individual ingredients. So, what we do to avoid that is running the feedstuff through a mixer to make what we call a TMR (total mixed ration), in which we combine all these ingredients together into one diet. We do that to create uniformity and to keep these cows consuming their diet consistently. Cows are great at finding the feedstuff that is more palatable to them and will look for that “goodie” or that “candy” in their diet.

It is crucially important to have the feedstuff in the TMR mixed effectively to maintain performance levels at high volumes and uphold good health.

Have a question or comment?

Big data is ready for the farm. But is the farm ready for big data?

84 percent of U.S. farmers who responded to a recent Stratus Ag Research survey said they have high-tech equipment that captures reams of data from livestock, planting, harvesting or crop protection operations. Yet, only 42 percent of them are transferring this information to a field data management software program for further analysis. 

The question is: How can producers harness all of this information to drive efficiency and profitability once it has been collected?

KEENAN, a technological entrepreneur of diet feeders, stepped up to this challenge by expanding into farm data analysis with InTouch technology, which delivers solutions on-farm in real time.

“We've been involved with the internet of things (IoT) since about 2011,” said Conan Condon, director of KEENAN’s InTouch system. “At that stage, there wasn't much connectivity. There were about 12 million connected devices. Today, there are about 6.4 billion connected devices.” 

At present, more than 2,000 livestock operations, ranging in size from tens to thousands of cows, use the InTouch system, a live review and support service that helps producers apply actionable intelligence to their operations, giving them the benefit of KEENAN’s access to data on more than 1.3 million monitored cows.

InTouch technology: Acting on data today

KEENAN InTouch is a simple, cloud-based communications platform that offers real-time performance monitoring. The system allows for all feed ingredients to be added to the diet feeder in consistent orders and ratios, thereby promoting feeding consistency and improving livestock performance and profitability.  

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Producers are looking for easy alternatives to interpreting and actioning data. InTouch supports that process, as data is automatically transferred and received after completion of every load. Not only are paperwork and time delays eliminated, but the InTouch platform also allows for instant feedback. This means that producers can make informed decisions on maintaining and/or improving ration accuracy, consistency and presentation, thereby maximizing livestock performance. InTouch can also incorporate data from other herd management software programs and services such as the Dairy Herd Improvement Association, resulting in better quality analysis. 

Convenience is also a key feature of InTouch. Ration changes can be made from a computer or smartphone, through the InTouch customer service center or programmed directly to the KEENAN diet feeder. Nutritionists can also send ration changes directly to the weigh scale on the diet feeder.

The pre-self-loading order and mixing time takes the guesswork out of loading accuracy, suggesting a mixing order based on type, length of cut and moisture levels of the ingredients. It also calculates the required number of mixing revolutions needed to maximize effective fiber and delivers a consistent, uniform mix, based on 17 years of data gathered from farms all around the world.

To maximize profits for producers, InTouch’s support services help them monitor everything from feed costs and diet feeder performance to proper inclusion rate accuracy in order to maximize profits. Daily, monthly and annual performance reports for feed efficiency, the cost to produce 100 pounds of milk, profit margin per cow and production trends are automatically produced. This means no more combing through data or handwritten notes to find patterns that might unlock efficiency — using InTouch, farm consultants can generate benchmark summary reports that can reveal management practices to improve livestock performance and profitability.

The MechFiber difference

Based on years of data from more than 1 million cows, KEENAN has developed a range of products tailored to the needs of farmers, including reel, self-propelled, vertical and static machines for small- to medium-sized farms and pro-mixers for high-volume feed manufacturing and larger farms. These machines are designed to improve rumen health, resulting in improved feed efficiency and livestock production.

They are durable and easy to maintain, with a low daily operating cost and stationary blades for controlled chopping. They have a simple drive system, with no gearbox required and they empty completely, so no ration ingredients intended for one group of animals are fed to another.

Each diet feeder has two chambers (mixing and dispensing) and, together with a six-paddle reel and patented fixed-knives system, is engineered to produce a consistent, uniform, fluffy mix called MechFiber, which is unique to KEENAN machines.

Independent trials have consistently shown that MechFiber retains the fiber structure needed to stimulate rumination, allowing greater absorption of energy and maximizing feed conversion efficiency.

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KEENAN diet feeders produce consistent rations from as little as five percent capacity up to 22,000 pounds. They easily handle and deliver a consistent, uniform mix for smaller dry cows, post-fresh cows and heifer groups. KEENAN customers can purchase separate ingredients to prepare their own premixes.  

Additionally, the low-power requirement design saves up to 50 percent in fuel consumption and reduces tractor and KEENAN diet feeder maintenance costs. Larger, more expensive tractors are not required compared to equivalent capacity vertical mixers, as a 120-horsepower tractor will operate a 1,000-cubic-foot diet feeder at recommended speeds of 1,200–1,500 revolutions per minute.

KEENAN started manufacturing quality diet feeders with cutting-edge designs and technology in 1978. In 2016, Alltech acquired KEENAN and is re-establishing the diet feeder in the U.S. market with a fresh approach to innovation that builds on KEENAN’s strong reputation for quality and performance.

Manufactured in Borris, County Carlow in Ireland, KEENAN products are available for purchase in the U.S. For more information about KEENAN, visit www.keenansystem.com. 

Have a question or comment?

The following is an edited transcript of Tom Martin’s interview with Ronald Faber of Coppens International, an Alltech Company. Ronald has since been promoted to managing director.

Click below to hear the full interview:

Tom: Coppens International, a leading international aquatic feed solutions company in the Netherlands, was acquired by Alltech in 2016. The company exports quality aquatic feed to more than 60 countries worldwide. Ronald Faber is its chief commercial officer. We welcome you here today, Ronald.

Ronald: Thank you very much for the invitation.

Tom: Glad to have you. Tell us about Coppens’ product line, if you will. What are your specialties?

Ronald: Our product line is very broad. We make a differentiation between our product lines: We have different feeds for the aquaculture industry — producing feed for fish, to grow fish. And, separately, we have a product line for hobby feeds.

Tom: And it’s a wide variety of fish: ornamental, specialty and even bait feeds.

Ronald: Correct. Even on bait, we have a superior product line, which we’re exporting to 60 countries worldwide.

Tom: What species of fish would you consider your target market?

Ronald: Do you mean for industrial feeds or for hobby feeds?

Tom: Let’s begin with industrial.

Ronald: For industrial, we have a very strong position in more advanced species — high-value species such as eel, trout and salmon. We are less active in the more budget-type of species such as tilapia.

Tom: And then on the ornamental side?

Ronald: For ornamental, we’re targeting high-priced species such as koi — they sell for thousands of euros per head — and other hobby species such as goldfish and shubunkins. We have specialized diets for ornamental and hobby fish.

Tom: What are the particular challenges you face with each of those divisions? Let’s start with industry again.

Ronald: Sure. The biggest challenge for us is, of course, the fish in-fish out ratio. We still use fishmeal from wild-caught fish to make our diets.

Tom: And then on the ornamental side? Pretty much the same?

Ronald: It’s similar, but on the ornamental side, the challenge is following the fast-changing requirements of the consumers.

Tom: You spent a couple of years working with fish and shrimp feed companies in Southeast Asia, India and, I believe, Indonesia. Is that correct?

Ronald: That’s correct. That’s right.

Tom: What were the most important takeaways from those experiences?

Ronald: Personally, of course, it was a very challenging period of my life being in a new culture. But the industry is developing so quickly in these countries that, in the Western world, we’re really left behind.

Tom: Is it fair to say that aquaculture is booming in Vietnam? And if it is, does Coppens participate in that?

Ronald: It’s definitely booming, and it’s not only booming in Vietnam. I was speaking to people from India yesterday, and I was really surprised by the huge volume produced there. So, it’s growing extremely fast all over the region.

Tom: And what species of fish are being farmed?

Ronald: Traditionally, it’s been shrimp, which has a high profit margin. But they also farm other fish species that are more mainstream, such as tilapia and pangasius.

Tom: What are some important challenges faced by aqua producers that might actually be an opportunity?

Ronald: One of the challenges is, I think, with sustainability. In the past, the industry hasn’t been very focused on sustainability, but rather on production.

Tom: How does Coppens benefit by integrating with Alltech’s algae production?

Ronald: That came to us at just the right time, definitely. We had been looking for new ways to develop our feeds. We spent a couple of years on projects that would allow us to convert to a zero fish in-fish out process, meaning we wouldn’t use fishmeal or fish oil. We had come a long way, but we were missing that last piece of the puzzle. Alltech brought us the last piece of the puzzle.

Tom: And what was that?

Ronald: That was, as you mentioned, the algae. Algae is a fantastic ingredient. It’s a sustainable source of DHA, which is required in the diets of many fish species. Normally, you would have to get DHA from fish oil, but we can now get it from algae.

Tom: There are many tens of thousands of species of algae. Are there any particular algae you focus on?

Ronald: Yes. We focus particularly on that which provide a high level of DHA in the diet.

Tom: What industry trends are you watching closely these days?

Ronald: The most important development is consolidation in the industry. Farms all around the world are becoming bigger and bigger and involve more technology.

Tom: When you think about it, how does your work affect the average consumer’s dinner table? What’s the consumer end of what you do? You’re on the feeding end, so the nutrition of the aquatic stock is important to you. How does that translate out on the other end to good food?

Ronald: Good food is reliable food. It’s tasty. It’s healthy. So, in our (feed) recipes, we always take care of these three aspects so that we transfer them from the feed to the final product.

Tom: You mentioned earlier that your experiences were wonderful in Southeast Asia and India. What do you most enjoy about your work besides that?

Ronald: I enjoy visiting different cultures; different countries. Fish farming is always done in fantastic places. It’s not done in an industrial way. Very often you are in very natural, very green environments. That makes it interesting.

Tom: Ronald Faber, chief commercial officer of Coppens International. Thank you so much for chatting with us.

Ronald: Thank you also.

Ronald Faber spoke at ONE: The Alltech Ideas Conference (ONE17). To hear his presentation on RAS farming and more talks from the conference, sign up for the Alltech Idea Lab.

Environmental control in pig housing is important for animal growth and health. Modern farms have computer-controlled systems that are adjusted automatically to optimize the environment depending on the stage of growth or reproduction, based on ideal temperature curves established from research and models. For example, for growing pigs, temperature needs to decrease by set amounts as they increase in body weight. However, it is important to ensure the correct growth curve is selected in any automated system to account for breed, age and health of the animals.

When animals have been moved to new housing, perhaps following weaning, it may take several days for them to adjust to their surroundings and the new supply of water and feed, and feed intake may drop during this time. The environmental temperature will need to be held at a higher level, compared to their weaning shed, until they have adapted suitably and resumed consumption and growth. Therefore, although computer-controlled systems are very useful, management by personnel and suitable reactions regarding changes in the regulation of temperature are still key to ensuring the growth and health of the pigs.

Relative humidity

Relative humidity (RH) is defined as the ratio of air-water vapor at a specific temperature compared to the maximum amount of water vapour the air could hold, expressed as a percentage. Under normal, ambient temperatures, pigs can tolerate wide ranges of RH, although RH is still used to assess air quality in housing, and RH should be maintained between 60 percent and 90 percent. Nasal mucosa can be severely reduced in very dry housing conditions (low RH), leading to an increased risk of developing health problems from airborne pathogens, particularly those of the respiratory tract. Conversely, in wet conditions with higher RH, pathogens present in water droplets increase exposure to disease.

For nursery pigs, high RH can be a problem when the ambient air temperature is low, as automated ventilation systems reduce the amount of fresh air circulating within the house, allowing RH to increase to problematic levels. Under these conditions, an increase in respiratory disease can occur, which may affect the health and growth of the pigs. Intervention by management personnel is required under these conditions to ensure ventilation rates are maintained. Additional space heaters can be used to get the house up to temperature before moving the piglets.

In modern housing systems, both temperature and RH can be controlled automatically via sensors. However, care is needed with these, as they can become damaged during clean out and power washing. Their accuracy should be verified on a regular basis using handheld and empirical devices.

According to the Centers for Disease Control and Prevention, every year in the United States, Salmonella is estimated to cause 1 million foodborne illnesses, with 19,000 hospitalizations and over 300 deaths. The most common symptoms of a Salmonella infection are diarrhea, fever and abdominal cramps. Although illness from Salmonella can be the result of multiple factors, including improper food preparation, poultry producers can help reduce the risk to consumers through good farm practices.

Potential sources of bacterial contamination:

• Wild birds/pests (e.g., beetles, flies, rodents)
• Water
• Visitors
• Human personnel’s hygiene

In poultry production, there are eight areas that require attention in order to reduce bad bacterial contamination on-farm and aid in the prevention of Salmonella.

1. Cleaning and hygiene

Residual contamination from previous flocks is a common reason for Salmonella-positive birds. Cleaning growing houses between flocks can significantly reduce the prevalence of Salmonella in live production. Effective biosecurity and pest control are also key to avoiding contamination.

2. Feed

Contaminated grains and feed ingredients can increase the risk of Salmonella in the final feed. Use heat-pelleted feed and source feed from mills operating with stringent quality standards.

3. Water management

Water management is a crucial part of any Salmonella control program in poultry, since water can serve as a medium for the organism to spread from bird to bird. Chlorinated water and the use of organic acids in the water have been shown to reduce Salmonella levels in the flock.

4. Dust

Dust can also be a medium for Salmonella to spread. A system that keeps dust levels below 3 milligrams per cubic meter is an important prevention tool.

5. Litter management

Poultry litter with high moisture and pH levels allows Salmonella to thrive. Managing the moisture and pH of the litter has been shown to be an effective way to control Salmonella in live poultry production.

6. Managing gut flora

Establishing and maintaining proper gut flora soon after hatching is very important to prevent Salmonella from colonizing birds. Programs that include the use of probiotics, organic acids, enzymes and yeast technologies have been shown to be effective at maintaining optimal gut health.

7. Coccidiosis

Intestinal challenges caused by poor gastrointestinal integrity can have a big impact on Salmonella levels in broilers. Strong cocci management needs to be part of every Salmonella control program.

8. Vaccination

The use of vaccines, especially at the breeder level, has the potential to reduce the prevalence of Salmonella among day-old chicks.

If you would like to learn more about how you can stop the spread of Salmonella in your poultry operation, please fill out the form below.

How do you prefer your salmon: wild-caught or farm-raised?

When that question came up in dinner conversations 20 years ago, the answer likely would have revealed skepticism about farmed fish.

In those days, the industry was new. Salmon farms were being accused of polluting the oceans. Some were found to be harboring and incubating disease, turning a blind eye to infected escapees, and wiping out forage fish, up to 7 pounds of which once went into each pound of farmed Atlantic salmon.

But those negatives did nothing to dampen a growing world population’s appetite for fish. Seventeen percent of the protein people eat already comes from the sea, and demand is set to rise by 40 percent by 2050, according to the Norwegian Seafood Council.

“The consumption of salmon has tripled over the past 15 years,” said Keith Filer, research coordinator for aquaculture at Alltech. “The increased consumption would not be possible by relying on wild-caught salmon. Farmed-raised salmon is the only option for supplying the increase in demand.”

Still, it’s not unusual to encounter lingering debate and a host of misperceptions over wild-caught versus farmed salmon. And in this era of the smart device with details about our foods accessible at our fingertips, there has been commensurate pressure from consumer and wildlife advocates to reform aquaculture.

“Salmon farmers did a funny thing,” wrote The Washington Post contributor Tamar Haspel. “They listened. The survival of the industry depended on farmers cleaning up their act, and so that’s what they started to do.”

That has included an effort to boost consumer confidence and demonstrate a commitment to the environment through independent, third-party certification.

“The best-regarded of the certification programs will require record keeping, disclosure and transparency so the public can know that the fish they choose has been secured with care,” said Contessa Kellogg-Winters, communications director at the Aquaculture Stewardship Council (ASC).

The ASC has developed certification based on industry standards that address the adverse impacts associated with aquaculture. Thousands of NGOs, scientists, academics, farmers and industry experts contributed to the process.

According to Kellogg-Winters, the ASC standards:

• Regulate where farms can be sited to protect vulnerable nature areas.
• Help protect the surrounding ecosystems and biodiversity.
• Preserve the quality of the water.
• Mandate strict criteria for resources use.
• Regulate feed practices and mandate that farms use more sustainable feed.
• Require best practices that combat the spread of illness and parasites between farmed fish and wild fish.
• Proactively prevent fish escapes.
• Reduce the use of pesticides and chemicals.
• Set stringent controls for the use of antibiotics.

These standards not only raise the bar on the quality of production, but also serve to combat misperceptions about farmed salmon. Here are some of the more persistent among them:

Myth: Farmed salmon are raised with growth hormones and antibiotics

“An important misperception that I have come across is the use of growth hormones and antibiotics in feeds for farmed salmon,” said Gijs Rutjes, technical sales support manager at the fish feed producer Alltech Coppens. “This is not true for the growth hormones. Antibiotics are only used as a last resort in salmon farming to cure a potentially dangerous bacterial disease but never to prevent diseases or to get performance benefit. Just like we would go to the doctor when we are seriously ill.”

Myth: Farmed fish are raised in dirty conditions and generate pollution

Concerns that fish are farmed in dirty water and crowded conditions linger. The industry, however, has developed a better understanding of regional capacity — the total number of farmed fish an area can support, according to the Monterey Bay Aquarium’s Seafood Watch. The result has been a decline in pollution as farms allow areas to recover before fish are replaced there.

Fish farmers “choose suitable sites for cage farming where the conditions and water quality are optimal,” said Rutjes. “They use feeds that keep the fish healthy and that ensure good growth. Nets are cleaned regularly to make sure sufficient water flow is there and to keep oxygen levels optimal. The salmon are kept at rather low densities, and they have spacious net cages that provide ample possibilities for natural behavior.”

Marine Harvest's salmon net cages in Norway.

For example, to prevent overcrowding, Norwegian law requires that salmon make up less than 2.5 percent of the pen’s volume. Each pen is made up of 97.5 percent water to allow for maximum comfort and a healthy growth cycle.

Salmon farms, he said, have been moving production to land-based recirculation aquaculture systems (RAS). These closed systems have no escapees, and the feces are collected and removed.

Salmon raised indoors at Marine Harvest in Norway.

Rutjes added that it’s in the fish farmer’s best interests to maintain a clean operation.

“A salmon farmer cares about his fish and knows the better he looks after them, the better the growth and flesh quality,” he explained.

Myth: Feed conversion rates are high and inefficient for farmed fish

Among lingering misconceptions is that a feed conversion rate of as much as 7 pounds of forage fish is needed to grow 1 pound of farmed salmon.

“The salmon industry has worked for many years to reduce the use of marine products in diets,” said Filer. “The feed conversion ratio for the industry has been reduced to as little as 1.6 to 1. The marine species that are used are not ones that are consumed by humans, and the major fish meal producers are much better at restricting the amount of fish harvested on a yearly basis.”

Alltech Coppens has yielded several new algae-based products that help reduce dependence on forage fish. These include the sustainable fish oil replacer ForPlus, an algae-derived fish oil substitute containing very high levels of DHA, which has been found to help reduce risk factors for heart diseases like high cholesterol and high blood pressure.

Myth: Farmed salmon are not an environmentally friendly choice

According to Kellogg-Winters, a side-by-side comparison of the resources and emissions it takes to produce salmon, chicken, pork, beef and lamb has shown salmon to be the most environmentally friendly of the group.

“Salmon convert more of what they are fed into consumable protein for the end user and require fewer resources for their feed,” she explained. “Pound for pound, salmon farming produces less waste — and requires fewer raw materials — to produce more of the food our growing global population needs.”

Myth: Farmed salmon’s pink hue is the result of artificial injections

A Lerøy Seafood Group employee fillets farmed salmon raised in Norway.

Another concern voiced by consumers is the notion that farmed salmon get their pink color from artificial injections. Kiara Vallier, a writer for the submersible vehicle manufacturer Deep Trekker, notes, “Both wild and farmed salmon get their pink color from a carotenoid antioxidant in their diet called astaxanthin, which is traditionally produced by algae that wild salmon consume. Generally, farmed salmon are fed a diet that contains a chemically synthesized astaxanthin, so they get their color from the same antioxidant as their wild counterparts.”

Myth: Wild salmon tastes better than farmed salmon

Meanwhile, at the dinner table, how does wild-caught salmon differ in taste and texture from the farmed variety? Which is best?

To find out, The Washington Post assembled a panel of noted Washington seafood chefs and a seafood wholesaler for a blind taste test. They included Scott Drewno, executive chef of The Source by Wolfgang Puck; chef-restaurateur Kaz Okochi (Kaz Sushi Bistro, Masa 14); chef-restaurateur Bob Kinkead (Ancora); Bonnie S. Benwick, Tim Carman and Jane Touzalin of The Washington Post; and John Rorapaugh, director of sustainable initiatives at ProFish.

The fish, in order of panel preference (rated 1–10, with 10 being the highest score):

1. Costco farmed Atlantic, frozen in 4 percent salt solution, from Norway; $6 per pound (7.6 out of 10)

2. Trader Joe’s farmed Atlantic, from Norway; $10.99 per pound (6.4)

3. Loch Duart farmed Atlantic, from Scotland; $15 to $18 per pound (6.1)

4. Verlasso farmed Atlantic, from Chile; $12 to $15 per pound (6)

5. Whole Foods farmed Atlantic salmon, from Scotland; $14.99 per pound (5.6)

6. ProFish wild king (netted), from Willapa Bay, Washington; $16 to $20 per pound (5.3)

7. AquaChile farmed Atlantic, from Chile; $12 to $15 per pound (4.9)

8. ProFish wild coho (trolled), from Alaska; $16 to $20 per pound (4.4)

9. ProFish wild king (trolled), from Willapa Bay, Washington; $16 to $20 per pound (4)

10. Costco wild coho, from Alaska; $10.99 per pound (3.9)

Much has changed, and for the better, since the early days of salmon farming.

“We have certainly seen improvements in the performance of the aquaculture sector over the years, and we expect even more to come as a greater number of farms understand the imperative of operating with great care for the environment and those who work on their farms,” noted Kellogg-Winters. “The farms that voluntarily commit to the ASC have to operate in a transparent manner: they must keep records, work well with the community and improve their environmental performance to meet the standard.”

You can stay current on salmon and other seafood by checking FishWatch, a National Oceanic and Atmospheric Administration (NOAA) website. The site profiles six salmon species: chum, coho, chinook, sockeye, pink and Atlantic (both wild and farmed).

Want to try your hand at whipping up a great salmon dinner? Listen to a segment of NPR’s “America’s Test Kitchen” on cooking wild versus farm-raised salmon.

Also, check out these salmon recipes from Norway.

I want to learn more about nutritional solutions for salmon.

Water is essential for life, yet water intake usually gets less attention than feed intake. We focus on quality, density and processing of feed, but we tend to take water for granted because it costs “nothing” — or at least does not appear on the feed bill.

Feed and water are closely linked, however. Birds typically drink 1.6 to two times the equivalent weight of feed, and, if water intake is limited, then feed intake declines. Furthermore, all digestive activity is dependant on water. Poor water quality can mean getting less than expected results from even the best quality feed.

Let’s get back to the basics of this element. There are several ways we can use water intake to help newly-placed chicks get a good start.

Water quality profiles

Minerals, hard and soft water, pH and alkalinity

Mineral content, pH, microbial contamination and temperature affect water quality and intake. Water quality profiles include pH, alkalinity and hardness.

pH is a measure of acidity, with pure water having a pH of 7. Values of less than 7 are considered acidic, while those above 7 are basic, or “alkaline.” Alkalinity reflects the capacity of water sources to buffer added acids without changing pH (total acidity). Water hardness, pH and/or alkalinity are not always directly associated, but generally, hard water has a higher pH.

Hard water contains larger amounts of minerals in the form of calcium and magnesium ions, which are picked up as rainwater percolates down through rock layers. In contrast, soft water has more sodium ions. The challenge with hard water is that it causes scale buildup, which gradually constricts pipes. The scale slows water flow, which ultimately reduces water consumption and, consequently, feed intake.

Minerals, such as magnesium, iron, sulfur, sodium and copper, can cause water rejection at very high concentrations due to bitter taste, or they can have laxative effects, whether from hard or soft water. Elevated mineral levels can be due to natural reasons or pollution.

Bacterial counts and biofilms

Zero bacteria per milliliter of water is desirable, but contamination is common. Coliform bacteria are of special concern. Coliforms are found in animal and human digestive tracts, and their presence in ground or surface water indicates fecal contamination.

Biofilms result from bacterial colonies that adhere to the inner walls of water lines. They produce a film that attracts other microbes and debris. A biofilm might occur in patches and can, on occasion, completely cover pipe walls. Biofilms protect bacteria from antibiotics and disinfectants and can block water lines. Bacteria (including coliforms) in biofilms flourish in places where water moves slowest or temperature is elevated, like the end of drinker lines, and when water remains in the line before the next use.

Using water to promote gut health

Chick hydration after placing

Early and sufficient water intake is critical during the first week of life. It is not uncommon for chicks to arrive at the shed dehydrated, and quick resolution is needed. Chicks drink sooner when placed near drinkers that dispense clean water at the right temperature and flow rate. Attention-getting lights and reflective drinker surfaces help, too.

Water and gut health

The chick’s digestive tract develops rapidly over the first week of life, and anything we can do to promote gut health during this time pays off in lower early mortality and overall feed efficiency. A healthy gut has the right mix of microbes, enzymes and healthy intestinal villi to aid pathogen defense and feed digestion. The medium in which these entities exist is water.

Microbial growth and digestive enzyme activity are sensitive to pH. Coliforms, including E. coli and Salmonella, grow best at pH levels above 7. In contrast, beneficial bacteria such as lactobacilli thrive at more acidic conditions (below 7). pH varies throughout the digestive tract, with values lowest (~2) in the stomach for the digestion of protein, then higher in the intestine and colon for the digestion of fats and carbohydrates. The bird needs the ability to maintain correct gut pH from the beginning, but gut cells are still developing. A simple way we can help the bird is by lowering drinking water pH.

Acidification: Prevents biofilms, lowers scale accumulation and reduces drinking water pH for better bird health

Acid-Pak 4-Way® contains a citric acid buffer, electrolytes and probiotics. When added to water, it reduces pH (i.e., increases acidity), which benefits both birds and pipes. Water pH is reduced to 4.5–5.5, which promotes the growth of normal and healthy bacteria in the gut, such as lactobacilli. At the same time, the lower pH discourages the growth of coliforms. The lower water pH also helps chicks adapt to dry feeds because it controls pH, promotes beneficial microbial growth and aids enzyme production.

Adding Acid-Pak 4-Way aids water line maintenance, too. It helps keep water flow steady, in addition to other benefits. Scale does not accumulate from hard water when acidified. Importantly, reducing pH by adding Acid-Pak 4-Way unseats biofilms in the water lines and keeps them from re-forming.

BEFORE placing your chicks, open the drinking lines, put Acid-Pak 4-Way in the water, flush the lines and THEN place the chicks.

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To improve the overall health of birds, attention needs to be placed on the whole production system. Healthy animals are much more likely to perform at their potential and produce more efficiently.

The gastrointestinal tract of layers is an ecosystem in which water, pH and bacteria need to be in balance. Setting the stage for this balance soon after hatch and maintaining it throughout the life of the animal is the key to maximizing performance and farm profitability.

Digestion in an increasingly plant-based diet

The diet for the bird must be made so that it is quickly digested and, in the case of layers, eventually turned into the building blocks of eggs. Yet, today, consumer demands for all-veggie diets complicate efforts to design an easily digestible diet. The grains used to make up the energy and protein in the diet will only release a portion of nutrients after digestion. The rest of the nutrients are bound in the plant cells and can only be released if these plant cells are broken down.

Enzymes added to the diet can help to break down these plant cells and allow the grains to release more nutrients to the bird. Generally, enzymes work in a “lock and key” model, in which a specific enzyme can only help to break down a specific compound. Because a poultry diet is complex, more than one enzyme may be needed to help with this breakdown.

Preventing bacterial overgrowth

How efficiently the feed is digested and absorbed by the bird can affect the bacterial balance in the gastrointestinal tract. Efficient breakdown and absorption of the feed by the bird can reduce the amount of undigested nutrients that reach the lower gut, where a diverse microbial population is concentrated.

This is important because, by reducing the undigested nutrients entering the lower gut, we reduce the potential of an environment to be created that supports opportunistic (potentially bad) bacterial overgrowth. Consequently, reducing the undigested nutrients reaching the lower gut helps to improve overall poultry health and performance.

Ancient process meets advanced technology

Nutritional technologies are available that can support this breakdown of nutrients. Through an ancient process called solid state fermentation (SSF), a selected strain of non-GMO Aspergillus niger works in synergy with the animal’s digestive system to break down layers of the feed that were previously inaccessible through digestion. This exposes more nutrient-rich layers for the animal to digest, such as amino acids, energy, protein and vitamins.

Advances in genetics have made today’s poultry more productive than ever. Any bird under environmental stress due to heat, cold, very dry or very humid air could have their feed intake patterns and intestinal tract affected, causing reduced digestibility. However, by paying close attention to the entire management system and to nutrition, poultry growers can respond quickly to challenges and achieve optimal potential.

To learn more about how Allzyme® SSF can help maintain performance in your flock and reduce feed costs while adding flexibility to the diet, click here or contact us at AllzymeSSF@alltech.com.