Duran A, Gabris J
Vet Med (Praha). 1983 Aug;28(8):473-9.
A negative relationship of glutamic acid content and milk yield over the first 100 days of lactation was found in a set of 20 cows. In some free amino acids, large differences exist between the cows with the higher milk yield and those with the lower milk yield, the largest difference being recorded in the content of glutamic acid (in favour of the cows with the lower milk output). The group of cows with the higher milk output per day or per first 100 days of lactation showed no dependence on any of the free amino acids in milk. The group of cows with the lower milk yield showed a significant negative relation of glutamic acid content to milk yield over the first 100 days of lactation and a significant to highly significant positive relation between serine, threonine and alanine contents on the one hand and daily milk yield on the other.
在一组20头奶牛中，发现泌乳期前100天谷氨酸含量与产奶量呈负相关。在一些游离氨基酸中，高产奶量奶牛和低产奶量奶牛之间存在很大差异，谷氨酸含量差异最大（低产奶量奶牛的谷氨酸含量更高）。每天或泌乳期前100天产奶量较高的奶牛组对牛奶中的任何游离氨基酸均无依赖性。低产奶量奶牛组在泌乳期前100天谷氨酸含量与产奶量呈显著负相关，丝氨酸、苏氨酸和丙氨酸含量与日产奶量之间呈显著至极显著正相关。
