日粮精粗比对牦牛犊牛生长性能、血清生化指标和经济效益的影响

Effects of dietary concentrate to coarse ratio on growth performance,serum biochemical indicators and economic benefits of yak calves

文章旨在探究日粮精粗比对牦牛犊牛生长性能、血清生化指标和经济效益的影响。试验将80头体重相近,健康状况良好的牦牛牛犊随机分为4组,每组5个重复,每重复4头。其中试验组1精粗比为30∶70;试验组2精粗比为40∶60;试验组3精粗比为50∶50;试验组4精粗比为60∶40。试验为期107 d,包括10 d预试验和97 d正式试验。试验结果表明,精粗比50∶50和60∶40组牦牛犊牛终末体重分别显著提高6.9%和12.81%(P<0.05),平均日增重分别显著提高10.72%和22.47%(P<0.05);平均日采食量分别显著降低6.11%和17.11%(P<0.05);料重比分别显著降低15.20%和32.41%(P<0.05)。随着精饲料添加量的提高,牦牛犊牛血清总蛋白、总胆固醇、甘油三酯和葡萄糖含量显著提高(P<0.05);日粮精粗比对牦牛犊牛血清白蛋白、尿素氮含量、谷丙转氨酶和谷草转氨酶活性无显著影响(P>0.05)。随日粮精粗比的提高,牦牛犊牛增重成本先升高后降低,分别为49.30、59.27、53.43和47.93元;毛利润分别为471.10、265.22、436.87和746.66元。综上所述,在本试验条件下,日粮精粗比60∶40组牦牛犊牛经济收益最高。

The aim of this experiment is to investigate the effects of dietary concentrate to coarse ratio on the growth performance,serum biochemical indicators,and economic benefits of yak calves.Select 80 yak calves with similar weight and good health status,and randomly divide them into 4 groups,with 5 replicates in each group,with 4 calves per replicate.Among them,the precision to coarseness ratio of experimental group 1 is 30:70;The fine to coarse ratio of Experiment Group 2 was 40:60;The precision to coarseness ratio of Test Group 3 is 50:50;The ratio of precision to coarseness in experimental group 4 is 60:40.The experiment lasted for a total of 107 days,including 10 days of pre testing and 97 days of formal testing.The experimental results showed that the final body weight of yak calves in the 50:50 and 60:40 fine to coarse ratio groups significantly increased by 6.9%and 12.81%,respectively(P<0.05),and the average daily weight gain significantly increased by 10.72%and 22.47%,respectively(P<0.05);The average daily feed intake significantly decreased by 6.11%and 17.11%,respectively(P<0.05);The material to weight ratio significantly decreased by 15.20%and 32.41%,respectively(P<0.05).With the increase of concentrate feed addition,the total protein,total cholesterol,triglycerides,and glucose content in serum of yak calves significantly increased(P<0.05);There was no significant effect of dietary concentrate to crude ratio on serum albumin,urea nitrogen content,alanine aminotransferase and alanine aminotransferase activities in yak calves(P>0.05).With the increase of the ratio of concentrate to crude in the diet,the weight gain cost of yak calves first increased and then decreased,reaching 49.30,59.27,53.43,and 47.93 yuan,respectively;The gross profit is 471.10 yuan,265.22 yuan,436.87 yuan,and 746.66 yuan,respectively.In summary,under the conditions of this experiment,the economic benefits of yak calves in the 60:40 ratio of concentrate to coarse diet group were the highest.