饲喂高淀粉饲粮时不同瘤胃降解淀粉水平对奶牛泌乳性能、营养物质表观消化率和氮平衡的影响

发布时间：2018-03-03 18:14

本文选题：奶牛　切入点：瘤胃降解淀粉　出处：《动物营养学报》2017年10期 　论文类型：期刊论文

【摘要】：本试验旨在研究饲喂高淀粉饲粮时不同瘤胃降解淀粉水平对奶牛泌乳性能、营养物质表观消化率和氮平衡的影响。选用10头荷斯坦经产奶牛[平均泌乳天数为(214±38)d,平均乳产量为(26.2±2.4)kg/d,平均体重为(727±65)kg]作为试验动物,随机分成2组,每组5头。试验设计2种不同瘤胃降解淀粉水平的试验饲粮,分别为瘤胃降解淀粉水平为62.3%(占总淀粉的百分比)的低瘤胃降解淀粉水平饲粮(L-RDS)和瘤胃降解淀粉水平为72.1%(占总淀粉的百分比)的高瘤胃降解淀粉水平饲粮(H-RDS)。采用交叉试验设计,试验分为2期,过渡期7 d,每期试验21 d,其中适应期14 d,采样期7 d。结果显示:1)相比L-RDS组,H-RDS组有机物和淀粉的表观消化率显著升高(P0.05),中性洗涤纤维和酸性洗涤纤维的表观消化率显著降低(P0.05),干物质表观消化率有升高趋势(P=0.07),蛋白质表观消化率无显著差异(P0.05)。2)相比L-RDS组,H-RDS组尿素氮及它们占摄入氮比例有降低趋势(P=0.09),摄入氮、乳氮、粪氮、尿氮和沉积氮及它们占摄入氮比例无显著变化(P0.05),尿中总嘌呤衍生物排出量和微生物蛋白产量亦无显著变化(P0.05)。3)饲粮瘤胃降解淀粉水平对奶牛干物质采食量、乳产量和乳成分均无显著影响(P0.05)。综合以上结果可知,饲喂高淀粉饲粮时不同瘤胃降解淀粉水平影响饲粮营养物质的表观消化率,对泌乳性能和氮平衡无显著影响。
[Abstract]:This experiment was conducted to study the fed high starch diets with different rumen degradable starch levels on lactation performance, apparent digestibility and nitrogen balance of nutrients. The 10 Holstein cows average lactation days for multiparous [(214 + 38) d, the average milk yield (26.2 + 2.4) kg/ D, the average weight of (727 + 65) kg] as the experimental animal, were randomly divided into 2 groups, 5 pigs in each group. The experimental diet test in 2 different levels of rumen degradation of starch and starch respectively rumen degradation level was 62.3% (% of total starch) low rumen degradable starch level intake (L-RDS) and rumen degradable starch level 72.1% (% of total starch) diets high in rumen starch levels (H-RDS). By using cross experiment design, the experiment was divided into 2 periods, the transition period of 7 d and 21 d in each experiment, the adaptation period of 14 d, 7 d. sampling results showed that: 1) compared with L-RDS group, H-RDS group of organic compounds And starch significantly increased apparent digestibility (P0.05), neutral detergent fiber and acid detergent fiber digestibility was significantly decreased (P0.05), dry matter digestibility increased (P=0.07), apparent digestibility of protein had no significant difference (P0.05).2) compared with L-RDS group, H-RDS group of urea nitrogen and nitrogen intake which accounted for ratio decrease trend (P=0.09), nitrogen intake, milk nitrogen, fecal nitrogen, urinary nitrogen and nitrogen deposition and their nitrogen intake accounted for ratio of no significant change (P0.05), total urinary purine derivatives excretion and microbial protein yield has no significant change (P0.05).3) of dietary rumen the degradation of starch levels on dry matter intake of dairy cows, have no significant effect on milk yield and milk composition (P0.05). Based on the above results, fed high starch diet when the effects of different levels of dietary starch rumen degradation of nutrients apparent digestibility, nitrogen balance on lactation performance and no significant influence Ring.

【作者单位】：东北农业大学动物科学技术学院;
【基金】：国家奶牛产业技术体系项目(CARS-37)
【分类号】：S823.5

【相似文献】