辣椒碱对安格斯杂交阉牛生长性能、营养物质表观消化率及血清生化和抗氧化指标的影响

Effects of Capsaicin on Growth Performance,Nutrient Apparent Digestibility and Serum Biochemical and Antioxidant Parameters of Angus Crossbred Steers

本试验旨在研究辣椒碱(CAP)对安格斯杂交阉牛生长性能、营养物质表观消化率及血清生化和抗氧化指标的影响,以评估辣椒碱在安格斯肉牛肥育阶段的应用效果。选取体况良好、体重相近的30头安格斯杂交阉牛,随机分为对照组(CON组)和试验组(EXP组),每组15头牛。CON组饲喂基础饲粮,EXP组在基础饲粮中每头牛补充1.5 g/d的辣椒碱。预试期14 d,正试期90 d。结果显示:1)2组之间体重、平均日增重、干物质采食量和料重比均无显著影响(P>0.05)。2)与CON组相比,EXP组干物质表观消化率和瘤胃微生物蛋白含量极显著升高(P<0.01),粗蛋白质表观消化率显著升高(P<0.05)。3)第90天,与CON组相比,EXP组血清谷丙转氨酶活性和谷草转氨酶活性极显著升高(P<0.01),血清白蛋白含量显著升高(P<0.05),血清尿素和甘油三酯含量显著降低(P<0.05)。综上所述,饲粮中添加辣椒碱可以提高安格斯杂交阉牛干物质和粗蛋白质表观消化率,增加瘤胃微生物蛋白合成和血清白蛋白含量,提高血清谷丙转氨酶和谷草转氨酶活性,减少血清尿素和甘油三酯含量,对生长性能和抗氧化能力无明显作用。

This experiment was conduced to study the effects of capsaicin on growth performance,nutrient apparent digestibility and serum biochemical and antioxidant parameters of Angus crossbred steers,and to explore the potential application of capsaicin of Angus beef cattle in fattening stage.Thirty Angus crossbreed steers with good body condition and similar body weight were selected and randomly divided into control group(CON group)and experimental group(EXP group)with 15 animals per group.The CON group was fed a basal diet,and the EXP group was fed the basal diet supplemented with 1.5 g/d capsaicin per cattle.The pre-experimental period lasted for 14 days,and the experimental period lasted for 90 days.The results showed as follows:1)there were no significant effect on the body weight,average daily gain,dry matter intake and feed to gain ratio between the two groups(P>0.05).2)Compared with the CON group,the dry matter apparent digestibility and rumen microbial protein content of the EXP group were significantly increased(P<0.01),and the crude protein apparent digestibility was significantly increased(P<0.05).3)On day 90,compared with the CON group,the activities of alanine aminotransferase and aspartate aminotransferase in serum of the EXP group were significantly increased(P<0.01),the serum albumin content was significantly increased(P<0.05),and the contents of urea and triglyceride in serum were significantly decreased(P<0.05).In conclusion,dietary supplementation of capsaicin can improve the dry matter and crude protein apparent digestibility of Angus crossbred steers,increase the rumen microbial protein synthesis and serum albumin content,increase the activities of alanine aminotransferase and aspartate aminotransferase in serum,and reduce the contents of urea and triglyceride in serum,but have no significant effects on growth performance and antioxidant capacity.