动物营养学报2018，Vol.30Issue(5)：1902-1910,9.DOI:10.3969/j.issn.1006-267x.2018.05.034
牛至油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 Oregano Oil on Ruminal Microbial Protein Production, Milk Performance and Nitrogen Excretion of Dairy Cows
摘要
Abstract
This experiment was conducted to study the effects of oregano oil on ruminal microbial protein (MCP)production, milk performance and nitrogen excretion of dairy cows. Forty healthy Holstein lactating cows with similar age, body weight, parity, milk yield, milk composition and lactation period[(90±15)d] were randomly divided into 4 groups with 10 cows per group. The addition amount of oregano oil in diets of control group and test groups 1,2 and 3 was 0,10,13 and 16 g/(d·head),respectively. The pretest lasted for 15 d,and the formal test lasted for 60 d. The results showed as follows:1)ruminal MCP production in test groups 1,2 and 3 was significantly increased by 9.77%(P<0.01), 16.14%(P<0.01)and 6.99%(P<0.05)compared with that in control group,respectively. 2)Milk yield in test groups 1,2 and 3 was increased by 5.10%(P>0.05),8.36%(P<0.05)and 5.00%(P>0.05)compared with that in control group, respec-tively; milk fat percentage in test group 2 was significantly higher than that in control group(P<0.05); Milk somatic cell count in test groups 1,2 and 3 was extremely significantly reduced compared with that in control group(P<0.01), especially the test group 2 was the lowest. 3)Total nitrogen excretion in test groups 1, 2 and 3 was reduced by 6.84%(P<0.01), 11.14%(P<0.01)and 4.72%(P<0.05)compared with that in control group, respectively. It can be seen that the adding oregano oil to diets can significantly increase the ru-minal MCP production,improve the milk performance,and decrease nitrogen excretion of dairy cows. Consid-ering the above indices, the optimal addition amount of oregano oil in diets of dairy cows is 13 g/(d·head).关键词
牛至油/瘤胃微生物蛋白/产奶性能/氮排泄Key words
oregano oil/ruminal microbial protein/milk performance/nitrogen excretion分类
农业科技引用本文复制引用
张凯祥,邢德芳,高许雷,王晓伟,孙国强..牛至油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,2018,30(5):1902-1910,9.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-09-08) （SDAIT-09-08）
