摘要
AbstractThis study aimed to investigate the effects of active dry yeast (ADY) on growth performance, rumen microbial composition and carcass performance of beef cattle. Thirty-two finishing beef cattle (yak ♂ × cattle-yaks ♀), with an average body weight of 110 ± 12.85 kg, were randomly assigned to one of four treatments: the low plane of nutrition group (control), low plane of nutrition group + ADY 2 g/head daily (ADY2), low plane of nutrition group + ADY 4 g/head daily (ADY4) and the high plane of nutrition group (HPN). Supplementation of ADY increased average daily gain compared to the control group. The neutral detergent fiber and acid detergent fiber apparent digestibility in HPN group was greater than that in control group. The propionic acid concentration in the rumen in ADY2, ADY4, and HPN groups was greater than that in control group. The Simpson and Shannon indexes in control and HPN groups were higher than that in ADY4 group. At the phylum level, the relative abundance of Firmicutes in the HPN group was higher than that in ADY4 group. The relative abundance of Ruminococcaceae UCG-002 in ADY4 group was higher than that in control and HPN groups. In conclusion, supplementation ADY 4 g/head daily shift the rumen microbial composition of beef cattle fed low plane of nutrition to a more similar composition with cattle fed with HPN diet and produce the similar carcass weight with HPN diet.HighlightsThe ADY can improve the utilization of nitrogen and decrease the negative impact on the environment in beef cattle.Cattle fed low plane of nutrition diet supplemented with ADY 4 g/head daily increased growth performance.Supplementation ADY 4 g/head daily in low plane of nutrition diet might be produced comparable carcass weight to HPN diet.
摘要译文
摘要这项研究旨在研究活性干酵母（ADY）对肉牛生长性能，瘤胃微生物组成和car体性能的影响。32次肉牛（牛♂×牛群♀），平均体重为110±12.85 kg，随机分配给四种治疗方法之一：营养基团的低平面（对照组），低营养平面组+ADY 2 g/head每日（ADY2），营养组的低平面+ADY 4 g/head每日（ADY4）和营养基团的高平面（HPN）。与对照组相比，ADY的补充增加了平均每日增益。HPN组中的中性洗涤剂纤维和酸清洁纤维明显的消化率大于对照组。ADY2，ADY4和HPN组的瘤胃中的丙酸浓度大于对照组。对照组中的Simpson和Shannon索引高于ADY4组的Simpson和HPN组。在门水平上，HPN组中富公司的相对丰度高于ADY4组的相对丰度。ADY4组中Ruminococcaceae UCG-002的相对丰度高于对照组和HPN组。总而言之，补充4 g/head每日换档肉瘤牛的瘤胃微生物组成，饲喂低营养的牛奶平面，用含有HPN饮食喂养的牛，并用HPN饮食产生类似的car体重量。Ady可以改善利用率氮的负面影响，减少对肉牛环境的负面影响。饲喂低的营养饮食平面，补充了ADY 4 g/head每天增加生长的表现。补充性供应ADY每天在营养饮食的低平面每天4克/头可能会产生可比的尸体重量为HPN饮食。
Siqiang Liu; Ali Mujtaba Shah; Mei Yuan; Kun Kang; Zhisheng Wang; Lizhi Wang; Bai Xue; Huawei Zou; Xiangfei Zhang; Peiqiang Yu; Hongze Wang; Gang Tian ; Quanhui Peng. Effects of dry yeast supplementation on growth performance, rumen fermentation characteristics, slaughter performance and microbial communities in beef cattle[J]. Animal Biotechnology, 2022,33(6): 1150-1160