摘要
本试验旨在研究日粮中新型酿酒酵母培养物(YCB)添加量对育肥猪生产性能、肌肉品质和肠道微生物的影响。选取440头初始体重为(61.49±0.36 kg)的健康三元杂交(杜×长×大)育肥猪,随机分为4组,基础日粮中未添加酿酒酵母培养物为试验Ⅰ组,添加2.5%传统酵母培养物(YCA)为试验Ⅱ组、添加2.5%新型酵母培养物(YCB)为试验Ⅲ组、添加5%YCB为试验Ⅳ组,试验期60天。结果表明:(1)基础日粮中添加YCA和YCB对育肥猪的平均日增重、饲料利用率均有所改善,其中试验Ⅳ组料重比最低,但差异不显著。(2)与试验Ⅰ组相比,试验Ⅱ、Ⅲ和Ⅳ组可显著降低肌肉滴水损失率和剪切力(P<0.05),其中试验Ⅳ组最低;与试验Ⅰ组相比,试验Ⅱ、Ⅲ和Ⅳ组肌内脂肪分别提高2.8%、6.7%和6.9%,但差异不显著;通过透射电镜发现,试验Ⅱ和Ⅳ组肌原纤维蛋白微量降解,试验Ⅰ组和Ⅲ组肌原纤维蛋白明显降解。(3)试验Ⅲ组和Ⅳ组粪便中瘤胃球菌属、颤螺菌属和粪球菌属等纤维分解菌属的丰度上升,显著增强育肥猪的脂质代谢、碳水化合物代谢、淀粉和蔗糖代谢(P<0.05),改善胆汁酸代谢和脂质代谢。综上可知,在育肥猪生产上添加YCB可以改善育肥猪的生产性能和肌肉品质,通过调节肠道微生物进而影响机体代谢,其生产中适宜添加量为5%。
The purpose is to investigate the effects of the addition of new S.cerevisiae culture(YCB)in the diet on the performance,muscle quality and intestinal microbes of fattening pigs.440 healthy three-way hybrid(Duroc×Landrace×Yorkshine)fattening pigs with an initial body weight of(61.49±0.36 kg)were randomly divided into 4 groups.The basal diet with no S.cerevisiae culture was test group I,adding 2.5%traditional yeast culture(YCA)was test group II,adding 2.5%new yeast culture(YCB)was test group III,and adding 5%YCB was test group IV.The test period was 60 days.The results showed that:(1)the addition of YCA and YCB in the basic diet improved the average daily gain and feed utilization rate of the fattening pigs,and the feed-weight ratio of the test IV group was the lowest,but no significant difference was shown(P>0.05);(2)compared with the test group I,the muscle drip loss rate and shear force in the test group II,III and IV were significantly reduced(P<0.05),and they were the lowest in the test group IV;compared with the test group I,the intramuscular fat in the test group II,III and IV increased by 2.8%,6.7%,and 6.9%,respectively,but the differences were not significant;transmission electron microscopy revealed that the fibrillin protein in the test group II and IV was slightly degraded,and the myofibrillar proteins in the test group I and III were significantly degraded;(3)the abundance of genus Fibrinolytics such as Ruminococcus,Treponema,and Staphylococcus was increased in the feces of group III and IV,and lipid metabolism,carbohydrate metabolism,starch and sucrose metabolism were significantly enhanced(P<0.05),to improve bile acid metabolism and lipid metabolism.In summary,the addition of YCB to the fattening pig production can improve the performance and muscle quality of the fattening pigs.By regulating the intestinal microbes and then affecting the body metabolism,the suitable addition amount in the production is 5%.
作者
郑文涌
杨涛
李双全
吕常旭
石敏
马立保
晏向华
Zheng Wenyong;Yang Tao;Li Shuangquan;Lv Changxu;Shi Min;Ma Libao;Yan Xianghua(State Key Laboratory of Agricultural Microbiology,College of Animal Science and Technology,Huazhong Agricultural University,Wuhan 430070;Hubei Luke Lehua Biotechnology Co.,Ltd.,Huanggang Hubei 438000)
出处
《中国农学通报》
2020年第21期145-154,共10页
Chinese Agricultural Science Bulletin
基金
企业横向课题“酿酒酵母培养物对育肥猪生长性能和肌肉品质的影响及机理研究”(102-707118004)
国家重点研发计划项目(2018YFD0500404)
关键词
新型酿酒酵母培养物
育肥猪
生产性能
肌肉品质
肠道微生物
novel Saccharomyces cerevisiae culture
fattening pig
production performance
muscle quality
intestinal microbes
