Effects of dietary concentrate to coarse ratio on growth performance,serum biochemical indicators and economic benefits of yak calves
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.
yak calvesfine to coarse ratiogrowth performanceserum biochemical indicatorseconomic benefits
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