棉籽粕替代豆粕对西门塔尔牛生长性能、血清生化指标及经济效益的影响

The effects of cottonseed meal replacing soybean meal on the growth performance,serum biochemical indicators,and economic benefits of Simmental cattle

文章旨在研究棉籽粕替代豆粕对西门塔尔牛生长性能、血清生化指标及经济效益的影响。试验选取72头10月龄左右初重相近[(295.28±16.09)kg]的西门塔尔牛,随机分为4组,每组3个重复,每个重复6头。对照组根据《肉牛饲养标准NY/T 815-2004》饲喂基础日粮,其余3组在等氮水平下分别饲喂含4%、8%、12%棉籽粕的试验日粮。试验期间,各组西门塔尔牛自由采食、自由饮水。试验为期90 d。结果:(1)与对照组相比,4%棉籽粕组、8%棉籽粕组西门塔尔牛的各项生长性能指标均无显著差异(P>0.05)。而与对照组相比,12%棉籽粕组西门塔尔牛的平均日增重显著降低10.78%(P<0.05),料重比显著升高10.99%(P<0.05)。(2)与对照组相比,12%棉籽粕组西门塔尔牛的血清总蛋白、白蛋白含量显著降低(P<0.05),尿素氮含量显著升高(P<0.05)。(3)但与对照组相比,12%棉籽粕组西门塔尔牛的增重情况、增重效益、经济效益显著降低(P<0.05)。其中,4%棉籽粕组的经济效益最高。结论:用12%棉籽粕替代豆粕,降低了西门塔尔牛生长性能和经济效益。从经济效益角度看,西门塔尔牛日粮中棉籽粕对豆粕的适宜替代水平为4%。

This experiment aims to investigate the effects of cottonseed meal replacing soybean meal on the growth performance,serum biochemical indicators,and economic benefits of Simmental cattle.72 Simmental cattle of approximately 10 months old with similar initial weight[(295.28±16.09)kg]were selected and randomly divided into 4 groups,with 3 replicates in each group and 6 cows in each replicate.The control group was fed a basic diet according to the Beef Cattle Feeding Standard NY/T 815-2004,while the other three groups were fed experimental diets containing 4%,8%,and 12%cottonseed meal at equal nitrogen levels.During the experiment,each group of Simmental cattle was free to feed and drink water.The experiment lasted for 90 days.Result:1)Compared with the control group,there was no significant difference in various growth performance indicators between the 4%cottonseed meal group and the 8%cottonseed meal group of Simmental cattle(P>0.05);Compared with the control group,the average daily weight gain of Simmental cattle in the 12%cottonseed meal group was significantly reduced by 10.78%(P<0.05),and the feed to weight ratio was significantly increased by 10.99%(P<0.05).2)Compared with the control group,the serum total protein and albumin content of Simmental cattle in the 12%cottonseed meal group were significantly reduced(P<0.05),while the urea nitrogen content was significantly increased(P<0.05).3)Compared with the control group,the weight gain,weight gain benefits,and economic benefits of Simmental cattle in the 12%cottonseed meal group were significantly reduced(P<0.05).Among them,the economic benefits of the 4%cottonseed meal group are the highest.Conclusion:Replacing soybean meal with 12%cottonseed meal reduced the growth performance and economic benefits of Simmental cattle.From an economic perspective,the appropriate substitution level of cottonseed meal for soybean meal in the diet of Simmental cattle is 4%.