標(biāo)題: cpm-dairy 配方--以氨基酸為基礎(chǔ)平衡奶牛日糧 [打印本頁] 作者: 矮子 時間: 2007-3-7 15:06 標(biāo)題: cpm-dairy 配方--以氨基酸為基礎(chǔ)平衡奶牛日糧 Summary
Amino acid supply to the mammary gland directly affects milk protein synthesis and milk volume and indirectly impacts productivity by affecting metabolism and immune function. The complexity of balancing rations on the basis of amino acids requires computer models. CPM-Dairy calculates amino acid requirements by a factorial method and by an ideal protein method. Balancing rations on the basis of amino begins with optimizing production of microbial protein in the rumen. Next, rumen outputs of amino acids are complemented with dietary sources that escape ruminal fermentation. Feeds with high concentrations of methionine and lysine in metabolizable protein are helpful but single sources of rumen-protected amino acids are usually needed.