不同水平大蒜素对肉羊生长性能及养殖经济效益的影响OA北大核心CSTPCD

The purpose of the experiment was to study the effects of different levels of allicin on the growth performance and economic benefits of mutton sheep,and to determine the optimum level of allicin in mutton sheep breeding.Forty healthy small-tailed Han sheep with similar body weight and condition were randomly divided into four groups,with 10 sheep in each group,and each sheep was a repeat.Sheep in control group were fed basal diets,while sheep in experimental group 1,group 2 and group 3 were fed experimental diets containing allicin 400,800,1 200 mg/kg,respectively.The pre-feeding period was seven days,and the formal trial period was 56 days.The results showed that compared with the control group,the final weight,total weight gain,average daily weight gain and average daily feed intake of mutton sheep in experimental group 2 and experimental group 3 increased significantly(P＜0.05),while the feed to weight ratio decreased significantly(P＜0.05).Compared with the control group,the serum levels of interleukin-1β(IL-1β),interleukin-10(IL-10),and immunoglobulin G(IgG)in experimental group 2 and experimental group 3 increased significantly(P＜0.05),while tumor necrosis factor-α(TNF-α)decreased significantly(P＜0.05).Compared with the control group,the rumen ammonia nitrogen level and acetic acid/propionic acid concentration in experimental group 2 and experimental group 3 decreased significantly(P＜0.05),while propionic acid concentration increased(P＜0.05).The levels of serum interleukin-6(IL-6)in all the allicin groups were significantly higher than those in control group(P＜0.05).Compared with the control group,the weight gain income of the allicin groups increased by 7.26％,14.97％,and 14.06％respectively,and the breeding profit increased by 7.01％,14.67％,and 6.49％,respectively.The study indicates that allicin can improve the growth performance,immunity,rumen fermentation function,and breeding profit of mutton sheep,and the appropriate amount of allicin is 800 mg/kg.