Article published the December 1, 2021
INTRODUCTIONSoybean meal´s good amino acids (AA) balance makes it an excellent protein source in poultry diets, although it does have the disadvantage of containing antinutritional factors such as trypsin inhibitors and lectins. These can negatively affect animal growth if the SBM is not adequately processed(1) using a proper cooking time and temperature to deactivate these factors(2). Exces ...
Participation in Forum on May 23, 2021
Carlos Martínez Amezcua, sorry for the mistakes, my Spanish translator betrayed me.
Participation in Forum on May 23, 2021
I totally agree, each nutrient has several functions, that is why I do not like the concept of replacing some of them with others that could be related, or be converted, some times this conversion is not 100% efficient, specially under stress conditions, if under those stress conditions, one function is increased, the extra dosage of the replace nutrient Will not help at all, example, conditional ...
Participation in Forum on May 20, 2021
Alfredo Irazusta,
I agree Betaine could have an impact, but we need to take care on Met + Cystein requierements, Cysteine is the first limiting amino acid in gut, and Cysteine is essential for Glutation and Glutation peroxidase, being the limiting amino acid under normal and stressal conditions, so I just recommend to be cautious whenever we defend replacement strategies
Participation in Forum on May 20, 2021
Park W. Waldroup, Dear Dr. Waldroup, great to read your comments, totally agree with you!!, specially under stress conditions, whenever cysteine requirements could increase, either to form glutation or any need for other protein or enzyme where cysteine is important, I will not play with Met + Cys requirements giving values to betain or even, be cautious with enzyme matrices!!, have a great day
Carlos Martínez Amezcua likes the comment:
We have extensively researched the relationship between betaine methionine and choline and at normal usage levels cannot recommended any sparing effect of betaine. However, it does aid in maintaining intestinal integrity and some studies have shown increased breast meat yield.
Carlos Martínez Amezcua likes the comment:
Carlos Martínez AmezcuaHi Carlos, Great point you are making! If we reduce the crude protein and use more crystalline amino acids to satisfy their requirement soybean meal inclusion is decreased. There will likely be less benefit of phytase as there is less substrate (phytin) for the phytase to degrade. I don't have the full answer but I agree that the phytase matrix values will likely be a ...
Participation in Forum on May 6, 2021
Carlos Martínez Amezcua,
Sorry there is a mistake, in my comment>
Phosphorus defficient, amino acid digestibilities values are decreased, if you add phosphorus or phytase, what you are really doing, is recovering AA digestibility, just think, what is the right sentence
1) Phosphorus Defficient diet AA dig 70/80 if add phosphorus or phytase recovers to 88/90!! or
2) PHosphorus defficient di ...
Participation in Forum on May 6, 2021
George Entz,
Dear all, enzymes are specific of substrates, I strongly recommend to check the energy and amino acid value improved by phytases or NSP xilanases, take care, the effect is secundary, and because of that inconsistent, dependent, if you have low phosphorus level or NSP carbohidrates in your diet, and you have the secundary effect because of Phosphorus defficiency, amino acid digestib ...
Carlos Martínez Amezcua likes the comment:
Both glutamate and glutamine are major energy sources for the small intestine of pigs. The pig’s small-intestinal mucosa has a limited ability to synthesize glutamine from glutamate but actively converts glutamine into glutamate via glutaminase. So, for the small intestine of pigs, glutamine can replace glutamate but the vice versa. Both glutamate and glutamine have their important functions beyon ...