湿玉米纤维饲料对奶牛瘤胃发酵和产奶性能的影响

发布时间：2018-10-08 10:44

【摘要】：为研究饲喂不同比例的湿玉米纤维饲料(WCGF)对奶牛瘤胃发酵以及对高产奶牛产奶性能的影响,试验1选用4头装有永久性瘤胃瘘管的健康荷斯坦牛,采用4×4拉丁方试验设计,在日粮干物质中添加WCGF比例分别为0%、15%、25%和35%,测定奶牛瘤胃内环境的变化。结果表明:随着WCGF饲喂量的增加,35%处理组奶牛瘤胃液氨态氮(NH3-N)浓度升高,乙酸浓度下降,且乙酸/丙酸也随之下降(P0.05)。试验2选择60头健康的高产奶牛,采用单因素随机试验设计,在日粮干物质中添加WCGF比例为25%,测定高产奶牛产奶性能的变化。结果表明:与对照组相比,试验组高产奶牛的产奶量虽然降低了2.65%,但提高了乳脂率(P0.05)。综上可知,WCGF在奶牛日粮配方中的比例不宜过高,当WCGF在高产奶牛日粮配方中添加比例为25%虽不能增加产奶量,但可提高乳脂率。
[Abstract]:In order to study the effect of different proportion of wet corn fiber feed (WCGF) on rumen fermentation and milk production performance of high yield cows, 4 healthy Holstein cattle with permanent rumen fistula were selected in experiment 1, and 4 脳 4 Latin square test design was used. The proportion of WCGF added to the diet was 25% and 35%, respectively, to determine the changes of rumen environment in dairy cows. The results showed that the concentration of rumen ammonia nitrogen (NH3-N) increased and the concentration of acetic acid decreased and the ratio of acetic acid / propionic acid decreased with the increase of feeding amount of WCGF (P0.05). In experiment 2, 60 healthy high-yielding cows were selected, and the single factor random trial design was used to measure the milk yield of high-yield cows by adding WCGF to the diet with a ratio of 25%. The results showed that: compared with the control group, the milk yield of high-yield dairy cows in the test group decreased 2.65%, but increased the milk fat rate (P0.05). It can be concluded that the proportion of WCGF in dairy diets should not be too high. When the proportion of WCGF added to the formula of high-yield dairy cows is 25%, it can not increase the milk yield, but can improve the milk fat rate.
【作者单位】：黑龙江省兽药饲料监察所;东北农业大学动物科学技术学院;
【基金】：资助项目:国家奶牛产业技术体系(CARS-37)
【分类号】：S823.5

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