不同精粗比饲粮中添加凝结芽孢杆菌对绵羊羔羊生长性能和消化代谢的影响  

Effects of Bacillus coagulans Supplementation in Different Concentrate to Forage Ratio Diets on Growth Performance,Digestion and Metabolism of Lambs

作　　者：王兴岗 张暄梓 杨代毅 郝小燕 张建新[1] WANG Xinggang;ZHANG Xuanzi;YANG Daiyi;HAO Xiaoyan;ZHANG Jianxin(College of Animal Science,Shanxi Agricultural University,Taigu 030801,China)

机构地区：[1]山西农业大学动物科学学院,太谷030801

出　　处：《动物营养学报》2024年第2期1075-1086,共12页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：现代农业产业技术体系建设专项资金资助(CARS-38);山西省现代农业产业技术体系建设专项资金资助;山西省1331工程建设项目。

摘　　要：本试验旨在研究不同精粗比条件下饲粮添加凝结芽孢杆菌(BC)对绵羊羔羊生长性能和消化代谢的影响。试验采用2×2因子完全随机设计,2个因素分别为精粗比[40∶60(低精料)、70∶30(高精料)]和BC[不添加和添加1.0×1010CFU/kg BC]。选取48只4月龄的杜泊×小尾寒羊F1代公羔,按体重随机分为4个组,分别饲喂低精料饲粮(LD组)、添加BC低精料饲粮(LD+BC组)、高精料饲粮(HD组)、添加BC高精料饲粮(HD+BC组),每组12只。生长性能试验共计70 d,其中预试期10 d,正试期60 d;消化代谢试验共计7 d,其中适应期4 d,取样期3 d。结果显示:1)24只饲喂高精料饲粮羔羊的末重(FBW)和平均日增重(ADG)显著或极显著高于24只饲喂低精料饲粮羔羊(P<0.05或P<0.01),并且料重比(F/G)极显著低于24只饲喂低精料饲粮羔羊(P<0.01);24只饲喂添加BC饲粮羔羊的ADG显著高于24只饲喂不添加BC饲粮羔羊(P<0.05)。2)24只饲喂高精料饲粮羔羊对干物质(DM)、有机物(OM)、中性洗涤纤维(NDF)的表观消化率极显著高于24只饲喂低精料饲粮羔羊(P<0.05),而对酸性洗涤纤维(ADF)的表观消化率则极显著低于24只饲喂低精料饲粮羔羊(P<0.01);24只饲喂添加BC饲粮羔羊对DM、OM、NDF的表观消化率显著高于24只饲喂不添加BC饲粮羔羊(P<0.05)。同时,饲粮精粗比和BC在羔羊对OM和NDF的表观消化率上有显著的交互作用(P<0.05)。HD+BC组的OM和NDF的表观消化率显著高于其他3组(P<0.05)。3)24只饲喂高精料饲粮羔羊的粪能、总能表观消化率、总能代谢率极显著低于24只饲喂低精料饲粮羔羊(P<0.01);24只饲喂添加BC饲粮羔羊的总能表观消化率显著高于24只饲喂不添加BC饲粮羔羊(P<0.05)。饲粮精粗比和BC在粪能和总能表观消化率上有显著的交互作用(P<0.05)。4)24只饲喂高精料饲粮羔羊在氮表观消化率、微生物蛋白(MCP)合成量上显著或极显著高于24只饲喂低精料饲粮羔羊(P<0.05或P<0.01);饲The aim of this experiment was to investigate the effects of Bacillus coagulans(BC)supplementation on growth performance,digestion and metabolism of sheep and lambs under different dietary concentrate to forage ratios.A 2×2 factorial completely randomized design was used in the experiment,with dietary concentrate to concentrate ratio[40∶60(low concentrate)and 70∶30(high concentrate)]and BC[no-added and added(1.0×1010 CFU/kg)]as two factors.Forty-eight F1 male lambs of Dolper×small-tail Han sheep aged 4 months were randomly divided into 4 groups according to body weight,they were fed low-concentrate diet(LD group),low-concentrate plus BC diet(LD+BC group),high-concentrate diet(HD group)and high-concentrate plus BC diet(HD+BC group),each group had 12 lambs.The growth performance test lasted for 70 days with the 10 days of pre-test period and 60 days of trial period,and the digestion and metabolism test lasted for 7 days with 4 days of adaptation period and 3 days of sampling period.The results showed as follows:1)final body weight(FBW)and average daily gain(ADG)of 24 lambs fed high-concentrate diet were significantly or extremely significantly higher than those of 24 lambs fed low-concentrate diet(P<0.05 or P<0.01),and feed/gain(F/G)of 24 lambs fed high-concentrate diet was significantly lower than that of 24 lambs fed low-concentrate diet(P<0.01).The ADG of 24 lambs fed BC added diet was extremely significantly higher than that of 24 lambs fed no BC added diet(P<0.05).2)The apparent digestibility of dry matter(DM),organic matter(OM)and neutral detergent fiber(NDF)of 24 lambs fed high-concentrate diet was significantly higher than that of 24 lambs fed low-concentrate diet(P<0.05),while the apparent digestibility of acid detergent fiber(ADF)of 24 lambs fed high-concentrate diet was extremely significantly lower than that of 24 lambs fed low-concentrate diet(P<0.01).The apparent digestibility of DM,OM and NDF of 24 lambs fed BC added diet was significantly higher than that of 24 lambs fed no BC added diet(P<0.

关 键 词：羔羊 精粗比 凝结芽孢杆菌 生长性能 消化代谢 经济效益 

分 类 号：S816[农业科学—饲料科学]