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Aminoacids in diet formulation for Dairy Cows

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December 25, 2019

If you feed unprotected lysine and methionine, it will be quickly degraded to ammonia in the rumen. It is better to feed rumen protected lysine and methionine.
Or else, supplement live yeast that would help enhancing rumen microbial growth which in turn would supply all essential amino acids to the host animal, including lysine and methionine.

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Joe Magadi Joe Magadi
Manager
December 25, 2019
Depending on the milk yield some supplementation with rumen protected amino acids may be necessary as microbial protein can only suffice for a limited amount of milk production.
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December 26, 2019
I agree
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December 30, 2019

Closer to three years I am working with the supplementation of Aminoacids (Lys\Met) in hot environments conditions (high THI). I learn that work with these Aminoacids in temperate conditions and in grazing systems in these places have better results because the temperature helps in good quality of grains and forages, have better quality that helps to improve the digestibility and the results.
Opposite to this, in hot conditions, the environment affects drastically the dairy cows body function, change and reduce the bacteriological activity as well affect the acidosis, change the hormonal conditions, etc. In stressed hot environments (Tropical, sub-tropical and desert conditions) is not the same management of the feeding, then the practical use of the Aminoacids is not the same and the results can see more in the positive effect of the milk protein, fat, body function and reproduction than in the milk productivity.
In corrals with 35/40 Lt average the main positive factor is relate to the reduction of the use of SBM in about 25% to 30% less, keeping the same productivity. Then the main effect is in the economic factor for the reduction of the Soy, than in the milk production increase.
At the same time for these conditions is advice the use of two types of Yeast to help increase the bacteriological development but also to improve the degradation of the lignin.

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December 30, 2019

Thank you very much for sharing your experience.

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January 4, 2020
Dear sir send best combination of mineral mixture to high milk production cows
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January 6, 2020

As pointed out in some earlier discussions, the use of supplemental by-pass amino acids is economically justified either to promote additional milk production or to allow the use of more economical sources of supplemental protein (amino acids). My exerience is that we usually are more economical in working first with locally available feedstuffs than starting to add the more expensive by-pass amino acid sources but the use of specific amino acid sources is often justified by increases in total milk production. It is always more economical to maximize use of locally available ingredients and then use added specialty ingredients as a targeted nutritional program. One of the earlier posts mentioned the use of correct mineral/vitamin supplements and the addition of high quality supplements will often increase both rumen function and supply the added mineral/vitamin program needed to support higher milk production, increased feed efficiency and support for reproduction. Nutrition is not magic in a bag--it is simple numbers needed to help the cow reach her potential. We need to remember that most ingredients supply both rumen available and rumen by-pass nutrition. We need to balance and use these naturally occurring by-pass nutrients as well as use the rumen produced nutrients before working to add commercial by-pass products.

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Joe Magadi Joe Magadi
Manager
January 8, 2020
Royce,

You are right. It is all about cost effective diet formulation and rationing that matter.
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January 13, 2020

In my experience, the use of protected amino acids (lysine and methionine) can be useful economically, and in the aspect of reproduction in high producing cows. But it is very important to consider the kinds of protein sources in the diet. In addition, to pay attention to NFC is very important.

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January 13, 2020

From personal experience in both temperate and tropical conditions, what is more important is understanding when to introduce protected Methionine, not lysine, in the ration. Optimizing the rumen condition to achieve optimum yields of microbial protein should be the main target. And, we can easily achieve this with very little or no soya or other expensive sources of by pass protein in the ration.

Most herd can formulate a more cost effective ration by target feeding of the right type of protected Methionine in place of expensive by pass protein sources like soya etc. Unfortunately, most nutritionist are obsessed with feeding soya and other expensive sources of by pass protein. The consequence of which is unnecessary high feeding cost to the farmer.

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January 15, 2020
Dr. Mustapha Salawu
You are right, but as you know Soya protein is deficient of enough methionine. So sometimes, in high producing cows, it is necessary to use protected methionine, especially if use soya as the main protein source.
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