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东北农业大学学报(英文版)
2008,15
(2)
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Journal of Northeast Agricultural University(English Edition)
2008,15
(2)
Effects of rumen protected methionine on milk yield and milk composition in earlier lactating cow.
作 者：
Sun ManJi;Shan AnShan
单 位：
;Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China.
关键词：
cattle feeding;cows;dairy cattle;dry matter;feed supplements;methionine;milk;milk composition;milk fat;milk protein;milk yield;cattle
摘 要：
A total of 12 mature healthy Holstein dairy cows, with an average body weight of 580+or-30 kg and milk yield of 22.5+or-2.8 kg, in the early stages of lactation were selected for this experiment. The cows were randomly divided into 2 groups of 6 cows each. Rumen-protected methionine at 20 g was supplemented daily. Results showed that rumen-protected methionine significantly increased milk yield by 10.83% and milk fat by 5.98% in the treated group (P<0.05). Nonsignificant increased in milk protein by 2.15% and decrease in dry matter were also observed (P>0.05).
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