Milk protein is an important index of milk quality,and the amino acids of milk protein come from the dietary amino acids. Casein,lactalbumin and lactoglobulin in milk protein not only meet the basic nutritional requirements of human body,but also play an important role in human growth development and health. They are the sources of high-quality protein from animals. Methionine and lysine are dietary limiting amino acids of dairy cows. They are not only important substrates for milk protein synthesis,but also signal molecules to regulate milk protein gene expression. In this paper,the requirements and sources of amino acids,essential amino acids, limiting amino acids,protective methionine and lysine in diets of dairy cows were reviewed. The core role of amino acid nutrition in protein anabolic metabolism was expounded,which could provide reference for guiding dietary formulation of dairy cows.
ZHANG Zunhui, LI Deyi
. Application of Protective Methionine and Lysine in Dairy Production[J]. China Dairy, 2022
, 0(11)
: 38
-42
.
DOI: 10.12377/1671-4393.22.11.06
[1] 宫春颖,孙健,粘靖祺,等.生牛乳质量影响因素的研究进展[J].中国乳业,2020(6):68-70.
[2] 刁其玉. 动物氨基酸营养与饲料[M].北京:化学工业出版社.
[3] 冯仰廉. 反刍动物营养学[M]. 北京:科学出版社,2004.
[4] Charles G S.Rumen-protected amino acids for dairy cattle:Progress towards determining lysine and methionine requirements[J]. Animal Feed Science Technology,1996,59:87-101.
[5] Fraser D L,φrskov E R,Whitelaw F G,et al.Limiting amino acids in dairy cows given casein as the sole source of protein[J]. Livestock Production Science,1991,28(3):235-252.
[6] Nichols J R,Schingoethea D J,Maiga H A,et al.Evaluation of corn distillers grains and ruminally protected lysine and methionine for lactating dairy cows[J]. Journal of Dairy Science,1998,81(2):482-491.
[7] Vanhatalo A,Huhtanen P,Toivonen V,et al.Response of dairy cows fed grass silage diets to abomasal infusions of histidine alone or in combinations with Methionine and Lysine[J]. Journal of Dairy Science,1999,82(12):2674-2685.
[8] Dhiman T R,Satter L D.Effect of ruminally degraded protein on protein available at the intestine assessed using blood amino acid concentrations[J]. Journal of Animal Science,1997, 75:1674-1680
[9] Clark J H, Klusmeyer T H,Cameron M R.Microbial protein synthesis and flows of nitrogen fractions to the duodenum of dairy cows[J]. Journal of Dairy Science,1992,75:2304-2323.
[10] Socha M T,Putnam D E,Garthwaite B D,et al.Improving intestinal amino acid supply of pre- and postpartum dairy cows with rumen-protected methionine and lysine[J]. Journal of Dairy Science,2005,88(3):1113-112.
[11] Wang C,Liu H Y,Wang Y M,et al.Effects of dietary supplementation of methionine and lysine on milk production and nitrogen utilization in dairy cows[J]. Journal of Dairy Science,2010,93(8):3661-3670.
[12] Robinson P H.Impacts of manipulating ration metabolizable lysine and methionine levels on the performance of lactating dairy cows: A systematic review of the literature[J]. Livestock Science,2010,127:115-126.
