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OKUN Babatunde In principle, all methionine sources are good. It depends on the price and the biological equivalence you assign to each source.
Participation in Forum on January 25, 2020
Further to this comment. I often do costing and training exercises looking at the impact of NOT using supplemental amino acids in commercial diets. Every time - in every situation - addition of a methionine source results in the highest cost saving and the highest reduction in crude protein content. As methionine is first-limiting amino acid in poultry feeds, this is not altogether surprising.Of c ...
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Dear Rami
Unfortunately still many of the nutrients in feed specification for poultry is crude, like CP , CF , EE and of course Ca.
Ca is usually over supplied to the poultry diet from many sources like:
Drinking water (as a rule of thumb poultry take water twice the feed intake) , Carrier in premix , concentrate , pro-prebiotics also as anti-caking agent in SBM.
For example when you add 1 kg ...
Participation in Forum on November 26, 2019
OK. Quite a nice article, but difficult to evaluate. There is no mention of milk production, which would be important as all health limits on M1 are based on concentration per litre milk, not per animal. Using your numbers above and the higher 6.2% transformation (carry over is a very poor term) this would give an M1 level of 10.5 µg per cow per day, reducing to 6.9 µg. Assuming 25 lit ...
Participation in Forum on September 24, 2019
Reply to Hamid Ibrahim Ismail;
The basis of any meaningful trial to compare sources of a single nutrient must start from a situation where that nutrient is the one limiting the performance parameter being monitored. In this situation we are evaluating methionine (more accurately M+C) and its impact on laying performance ie egg numbers, weight, and total mass. One should usually choose a point in t ...
Participation in Forum on September 18, 2019
This video is factually incorrect. Methionine is an essential amino acid, meaning that in higher animals it cannot be synthesised; it must be consumed within the diet. Plants and micro-organisms can synthesise methionine.
Whenever a properly designed and conducted comparison trial is conducted, the equivalence of these herbal products is invariably around 3%. In other words, they are NOT effecti ...
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The article was written as per applications in ruminant production systems. I know, by experience, that producers have "overfed" antibiotics for years. Not from the standpoint of feeding higher levels that legally allowed but in situations where it may not have been necessary. I.e. feeding it as a form of insurance. Personally, no, I don't believe that fed antibiotics, particularly in ruminants ha ...
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Park W. Waldroup Since 2017, drugs considered medically important by the FDA can not be used solely for growth promotion in the US. The problem with this is that bacitracin, which is used in human medicine, can be used to promote growth in animals because FDA unlike WHO does not consider it medically important. Bacitracin has recently been shown to select for bacteria that carry the mcr-1 gene tha ...
Martin Smith likes this technical article:
Feed is one of the most important component which accounts for 60 to 70% of the total cost of pig production. In commercial piglet diets, allowing only protein feedstuffs to meet the dietary lysine needs of the animal would increase levels of other essential and non-essential amino acids (AA) beyond requirement. This would eventually result in diets with higher crude protein (CP) content. The majo ...
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Conclusion
Response of juvenile Nile tilapia to 3 levels of dietary Met (0.77 %, 0.95 % and 1.15 %) and 4 levels of dietary Lys (1.2 %, 1.6 %, 2.0 %, and 2.4 %) were evaluated in 3x4 factorial design over a 56-d feeding trial.
Data showed main effects of both Met and Lys as well as their interaction (Lys x Met) effects on the performance of tilapia. Looking at the interaction effects, it was e ...