动物营养学报2016，Vol.28Issue(4)：1090-1098,9.DOI:10.3969/j.issn.1006-267x.2016.04.017
小肽对奶牛瘤胃微生物蛋白产量、产奶性能和氮排泄的影响
Effects of Small Peptides on Ruminal Microbial Protein Production, Milk Performance and Nitrogen Excretion of Dairy Cows
摘要
Abstract
This experiment was conducted to determine the effects of small peptides ( SP) on ruminal microbial protein production, milk performance and nitrogen excretion of dairy cows. Forty Holstein cows with similar age, body weight, milk yield and lactation stage [(45±15) days in milk] were divided into 4 groups with 10 cows per group. The supplement level of SP in control and test groups 1, 2 and 3 was 0, 50, 100 and 150 g/( d·head) , respectively. The pretest lasted for 15 days, and the test lasted for 60 days. The results showed as follows: 1) ruminal microbial protein production in test groups 1, 2 and 3 was significantly in-creased by 17.38%, 22.94% and 12.22% compared with that in control group ( P<0.05) . 2) Test groups 1, 2 and 3 had 9.93%, 12.64% and 7.53% greater milk yield than control group ( P<0.05); SP could signifi-cantly increase milk fat percentage and milk protein percentage (P<0.05), and significantly reduce milk so-matic cell count ( P<0.05) , especially test group 2. 3) Compared with control group, total nitrogen excretion in test groups was significantly reduced ( P<0.05) , and was reduced by 13.31%, 15.01% and 9.43% in test groups 1, 2 and 3, respectively. Based on the data of ruminal microbial protein production, milk yield, milk composition content and nitrogen excretion indices, it can be concluded that the suitable supplement level of SP is 100 g/(d·head) in dairy cows under the condition in the present study.关键词
小肽/瘤胃微生物蛋白/产奶性能/氮排泄Key words
small peptides/microbial protein/milk performance/nitrogen excretion分类
农业科技引用本文复制引用
吴丹丹,滕乐邦,栾正庆,孙国强..小肽对奶牛瘤胃微生物蛋白产量、产奶性能和氮排泄的影响[J].动物营养学报,2016,28(4):1090-1098,9.基金项目
山东省现代农业产业技术体系牛产业创新团队( SDAIT-12-011-08) （ SDAIT-12-011-08）
