半胱胺和酵母培养物对奶牛瘤胃微生物蛋白产量和养分消化率的影响

发布时间：2018-11-07 07:34

【摘要】：本试验旨在研究半胱胺(CS)和酵母培养物(YC)不同添加量组合对奶牛瘤胃微生物蛋白(MCP)产量和养分消化率的影响。选取年龄、体重、产奶量及泌乳期相近的荷斯坦奶牛40头,分为10组,每组4头。对照组(C)饲喂基础日粮,试验组补饲添加3个水平的CS(L:17.5 g/d,M:20 g/d,H:22.5 g/d)和YC(L:90 g/d,M:100 g/d,H:110 g/d),共有LL、ML、HL、LM、MM、HM、LH、MH和HH 9个不同水平组合,测定不同组合的瘤胃MCP产量和养分消化率。结果表明:试验组能提高瘤胃MCP产量,其中HM组奶牛瘤胃MCP产量比对照组提高26.53%(P0.01),效果最好;试验组日粮干物质、粗蛋白、钙、磷的表观消化率显著或极显著高于对照组(P0.05或P0.01)。本试验条件下,综合考虑瘤胃MCP产量、养分表观消化率,CS和YC的最佳添加量组合分别为每头22.5、100 g/d。
[Abstract]:The purpose of this study was to study the effects of different combinations of cysteamine (CS) and yeast culture (YC) on the yield and nutrient digestibility of rumen microbial protein (MCP) in dairy cows. Forty Holstein cows with similar age, body weight, milk yield and lactation period were divided into 10 groups with 4 cows in each group. The control group (C) was fed basic diet, the experimental group was supplemented with three levels of CS (L: 17.5 g / d: M: 20 g / d) and YC (L: 90 g / dm: 100 g / d), and the control group was supplemented with three levels of CS (L: 17.5 g / d: M: 20 g / d) and YC (L: 90 g / dm: 100 g / d). Nine different combinations of LL,ML,HL,LM,MM,HM,LH,MH and HH were used to determine the yield and nutrient digestibility of rumen MCP. The results showed that the rumen MCP production in the experimental group was increased by 26.53% (P0.01), and the rumen MCP production in the HM group was better than that in the control group (P0.01). The apparent digestibility of dry matter, crude protein, calcium and phosphorus in the trial group was significantly higher than that in the control group (P0.05 or P0.01). Under the experimental conditions, the rumen MCP yield, apparent nutrient digestibility, and the optimum addition of CS and YC were 22.5100 g / d for each head, respectively.
【作者单位】：青岛农业大学动物科技学院;平度市畜牧兽医局;山东省农业电视广播蓬莱市分校;
【基金】：资助项目:山东省现代农业产业技术体系牛产业创新团队(SDAI T-09-08)
【分类号】：S823.5

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