肉牛TMR日粮粒度和饲料消化率分析

[目的]分析肉牛场不同牛群全混合日粮(TMR)的粒度和饲料消化率。[方法]在固原市瑞科丰农牧科技有限公司选取西门塔尔牛犊牛、母牛、育肥牛各120头作为试验牛群,对照组和试验组各60头,试验组日粮中添加酵母培养物AYC-X6,对照组未添加。[结果]结果表明,断奶犊牛和育肥牛TMR日粮粒度第2层比例最高分别为51.60%,52.9%。母牛第1,2,3层比例基本相同,在20.30%～21.85%之间。犊牛日粮中添加酵母培养物AYC-X6后第1,2层筛上物合计35%,比例下降,说明犊牛消化程度增加,消化率提高。育肥牛日粮第1,2层筛上物合计分别为64%,48%,分别比对照组降低8%,24%。[结论]肉牛TMR日粮粒度越大,粗饲料越长,过瘤胃速度越慢;育肥前期粗饲料长度为2.5 cm,育肥后期粗饲料长度3.5 cm。断奶犊牛和育肥牛日粮中添加酵母培养物AYC-X6提高了饲料消化率。

Analysis of the Length of Roughage and Feed Digestibility of TMR in Beef Cattle

[Objective] The length of roughage and feed digestibility of TMR were analyzed in beef cattle. [Method] 120 Simmental calves, cows and fattening cattle were selected as the experimental cattle group, 60 in the control group and the experimental group respectively in Ruikefeng agriculture and animal husbandry technology Co., Ltd. Yeast culture AYC-X6 was added to the diet of the experimental group, but not in the control group. [Results] The proportion of the second layer of TMR of weaned calves and fattening cattle was 51.60% and 52.9% respectively. The proportion of the first, second and third layers of the cow is basically the same, between 20.30% and 21.85%. After adding yeast culture AYC-X6 to the diet of calves, the proportion of the first and second sieves decreased by 35%, indicating that the digestibility of calves increased and the digestibility increased. It was found that the total amount of the first and the second sieves was 64% and 48% respectively, 8% and 24% lower than that of the control group. [Conclusion] The larger the length of roughage of TMR diet, the longer the roughage, the slower the rumen passing speed; the roughage length was 2.5 cm in the early stage of fattening and 3.5 cm in the late stage of fattening. Yeast culture AYC-X6 was added to the diets of weaned calves and fattening calves to improve feed digestibility.