PDF(Pubmed)
Abstract：
The aim of this study was to determine whether the inclusion of 40% of common vetch (CV) hay as a feed ingredient in place of alfalfa hay (AH) would improve performance and ruminal fermentation and microbiota in fattening lambs. Twenty lambs were equally divided into two groups: control group (fed 40% AH with 20% rice straw) and CV group (fed 40% CV hay with 20% rice straw). Concerning hay quality, CV hay had greater in vitro digestibility of dry matter and neutral detergent fiber (p < 0.05) than AH. Lambs fed the CV diet had a higher average daily gain (ADG) and efficiency of feed and economy than lambs fed the control group. The NH3-N content and estimated methane produced per unit of ADG of the CV diet group were significantly lower (p < 0.05) than control group. Multiple differential microbial genera were identified, with Prevotella being the most dominant genus and a tendency towards higher (p = 0.095) in lambs offered CV diet. The higher Ruminococcus abundance (p < 0.05) was found in animals of the CV group compared to the control group. In summary, CV can be incorporated into lamb diets as a low-cost forage alternative to AH to improve feed efficiency and animal performance and to reduce methane produced per unit of ADG.
摘要：
这项研究的目的是确定是否包含40％的普通vetch（CV）干草作为饲料成分代替苜蓿干草（AH）会改善育肥羔羊的性能，瘤胃发酵和微生物群。将20只羔羊平均分为两组：对照组（饲喂40％AH和20％稻草）和CV组（饲喂40％CV干草和20％稻草）。关于干草质量，CV干草的干物质和中性洗涤剂纤维的体外消化率（p<0.05）高于AH。饲喂CV日粮的羔羊比饲喂对照组的羔羊具有更高的平均日增重（ADG）和饲料效率和经济性。CV饮食组的NH3-N含量和每单位ADG产生的估计甲烷显著低于对照组(p<0.05)。鉴定了多个差异微生物属，Prevotella是最主要的属，并且在提供CV饮食的羔羊中倾向于更高（p=0.095）。与对照组相比,在CV组的动物中发现更高的Ruminococus丰度(p<0.05)。总之,CV可以作为AH的低成本饲料替代品掺入羔羊日粮中，以提高饲料效率和动物性能，并减少每单位ADG产生的甲烷。
