Effects of different combinations of corn cob and reed grass on production performance and blood biochemical indicators of Western crossbred beef cattle
This experiment was conducted to study the effects of dietary supplementation of corn cob and reed grass with different proportions on growth performance and serum biochemical indices of Simmental hybrid beef cattle.Thirty-two healthy Simmental crossbred beef cattle with body weight of about 500 kg were randomly divided into 4 groups with 8 cattle per group and one replicate per head.The control group was supplemented with 4％corn cob+4％reed grass basal TMR diet,and the combination ratio of corn cob and reed grass in the basal TMR diet of test groups 1,2 and 3 were 8％corn cob+4％reed grass,6％corn cob+6％reed grass,4％corn cob+8％reed grass,respectively.The pre-feeding period was 15 days and the formal period was 60 days.The results showed that the average daily gain of group 1,group 2 and group 3 increased by 27.03％,3.60％and 22.52％(P＞0.05)compared with the control group,respectively,and the average feed to weight ratio decreased by 16.67％,12.34％and 22.05％(P＞0.05)compared with the control group.The urea nitrogen content in the experimental group 2 decreased by 28.16％,27.67％and 35.20％compared with the control group,group 1 and group 3,respectively,with significant differences(P＜0.05);The triglyceride(TG)content in group 2 decreased by 43.90％compared with group 3(P＜0.05);The results suggested that adding appropriate amount of corn cob and reed grass in the diets of beef cattle in the late fending period could improve the average daily gain of Simmental hybrid beef cattle to some extent,reduce the ratio of feed to gain,promote the absorption and metabolism of protein,reduce feed cost and improve breeding efficiency.It was recommended to add 4％～8％corn cob and 4％～6％reed grass in the total mixed diet.
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