绿原酸对断奶新疆褐牛犊牛生长性能、体尺参数、养分表观消化率及血清指标的影响OA

This experiment was conducted to study the effects of dietary supplementation of chlorogenic acid on growth performance,body measurement parameters,nutrient apparent digestibility and serum indices of Xin-jiang brown calves.Twelve 4-month-old weaned Xinjiang brown calves with similar body weight[(125.45±20.68)kg]were randomly divided into 2 groups with 6 calves in each group.The control group was fed a bas-al diet,and the test group was fed the basal diet+2 g/kg chlorogenic acid.The pre-experimental period lasted for 10 days,and the experimental period lasted for 90 days.The results showed as follows:1)compared with the control group,the average daily gain of the test group showed an increasing trend during days 1 to 90(P=0.091),and the feed to gain ratio showed a decreasing trend during days 1 to 30(P=0.073).2)Compared with the control group,the chest girth of the test group showed an increasing trend on day 90(P=0.090).3)Compared with the control group,the acid detergent fiber apparent digestibility of the test group was signifi-cantly increased(P<0.05),and the dry matter apparent digestibility showed an increasing trend(P=0.050).4)Compared with the control group,the contents of total cholesterol and malondialdehyde in serum were sig-nificantly decreased(P<0.05),the serum immunoglobulin G content was extremely significantly increased(P<0.01),and the serum superoxide dismutase activity showed an increasing trend(P=0.051).In conclu-sion,dietary supplementation of 2 g/kg chlorogenic acid can increase the acid detergent fiber apparent digesti-bility and serum immunoglobulin G content,decrease the serum total cholesterol and malondialdehyde contents of Xinjiang brown calves during 4 to 6 months of age,and has a certain effect on improving growth perform-ance and body antioxidant capacity.