不同青贮饲料对肉羊生长性能、屠宰性能、免疫功能和经济效益的影响

Effects of Different Silage on Growth Performance,Slaughtering Performance,Immune Function,and Economic Benefits of Mutton Sheep

试验旨在探讨青贮苜蓿、青贮玉米和青贮饲料桑替代日粮中部分花生秧对肉羊生长性能、屠宰性能、免疫功能和经济效益的影响。选取杜寒杂交育肥羊80只,随机分为4组,每组5个重复,每个重复4只羊。对照组饲喂基础饲粮,试验组分别使用青贮苜蓿、青贮玉米和青贮饲料桑替代基础饲粮中60%的花生秧。结果表明:与对照组相比,使用青贮苜蓿、青贮玉米和青贮饲料桑均能显著提高肉羊试验末重(P<0.05),显著降低料重比(P<0.05);使用青贮苜蓿替代饲粮中的花生秧能显著提高肉羊平均日增重(P<0.05);使用青贮苜蓿、青贮玉米和青贮饲料桑替代饲粮中的花生秧均能显著提高肉羊宰前活重、胴体重和眼肌面积(P<0.05);使用青贮苜蓿、青贮玉米和青贮饲料桑替代饲粮中的花生秧均能显著提高肉羊血清中免疫球蛋白A(IgA)和白细胞介素2(IL-2)含量(P<0.05),显著降低肿瘤坏死因子α(TNF-α)和白细胞介素1β(IL-1β)含量(P<0.05);青贮苜蓿组肉羊的每日利润提高了19.47%。综上所述,肉羊饲粮中用青贮苜蓿、青贮玉米或青贮饲料桑部分替代花生秧可以提高肉羊的生长性能和屠宰性能,改善肉羊机体免疫功能,增加养殖经济效益,以青贮苜蓿的应用效果最佳。

This experiment was designed to study the effects of alfalfa silage,maize silage and mulberry silage replacement diets with some peanut seedlings on growth performance,slaughter performance,immune function and economic benefits of mutton sheep.A total of 80 Duhan crossbred finishing mutton sheep were selected and randomly divided into four groups,with five replicates designed for each group and four sheep for each replicate.The control group was fed a basal diet,and the experimental group used alfalfa silage,corn silage and mulberry silage to replace 60%of the peanut seedlings in the basal diet,respectively.The results showed that compared with the control group,the use of alfalfa silage,corn silage and mulberry silage significantly increased the weight(P<0.05)and significantly decreased the feed-to-weight ratio(P<0.05)of mutton sheep;the use of alfalfa silage significantly increased the average daily weight gain of mutton sheep(P<0.05);and the use of alfalfa silage,corn silage and mulberry silage significantly increased the live weight,slaughter rate and eye muscle area(P<0.05);the use of alfalfa silage,maize silage and mulberry silage significantly increased the serum levels of Immunoglobulin A and Interleukin-2(P<0.05)and significantly decreased the serum levels of tumor necrosis factor-αand Interleukin-1β(P<0.05)in mutton sheep;the daily economic profit of silage alfalfa group mutton sheep increased by 19.47%.In summary,the partial replacement of peanut seedlings with silage alfalfa,silage corn,or silage mulberry in the diets of mutton sheep can improve the growth and slaughter performance of sheep,improve the immune function of sheep,increase economic benefits,and the application of alfalfa silage has the best application effect.