To study the effects of tannin acid(TA)on the growth performance,rumen fermentation parameters and apparent digestibility of nutrients in meat sheep.200 sheep were divided into 4 groups according to the principle of full randomization,with 1 group for every 10 replicates and 5 sheep for each replicate.The groups were fed experimental diets of 0,150,300 and 600 mg/kg added to the basal diet,respectively.The trial lasted for 9 weeks,including 1 week of preliminary test and 8 weeks of main test.Results:the FBW of the 600 mg/kg TA group was significantly higher than that of the control group by 2.51%(P＜0.05),the ADG of the TA group at 600 mg/kg was significantly increased by 8.47%compared with the control group(P＜0.05),the DMI of the TA group at 300 and 600 mg/kg was significantly increased by 3.01%and 2.78%compared with the control group(P＜0.05),and the F/G of the TA group at 600 mg/kg was significantly higher than that of the control group(P＜0.05),and the F/G was significantly higher than that of the control group by 5.25%(P＜0.05).Compared with the control group,the rumen protein content of the TA group at 300 and 600 mg/kg was significantly higher than that in the control group(P＜0.05).The rumen pH and total volatile fatty acid content of the TA group at 300 and 600 mg/kg were significantly lower than those in the control group(P＜0.05).The rumen acetic acid content of meat sheep in the TA group at 300 and 600 mg/kg was significantly decreased(P＜0.05).The content of rumen valeric acid in the TA groups at 300 and 600 mg/kg was significantly increased(P＜0.05).The digestibility of crude protein in beef cattle in the TA group at 300 and 600 mg/kg was significantly improved(P＜0.05).The digestibility of crude fat in the TA group at 600 mg/kg was significantly improved(P＜0.05).The digestibility of crude fat in the TA group at 600 mg/kg was significantly improved(P＜0.05).The digestibility of neutral detergent fiber in the TA group was significantly increased(P＜0.05).Tannic acid can improve rumen fermentation and nutrient absorption and ultimately improve the growth performance of meat sheep,and under the conditions of this experiment,600 mg/kg TA had the best feeding effect on meat sheep.
维普
万方数据
