低蛋白饲粮对生长育肥猪的饲喂效果

选择健康的、体重25 kg左右的中猪120头,随机分为3组,以A(对照组)、B(低2％蛋白质组)、C(低3％蛋白质组)3种不同蛋白水平的饲粮饲喂,试验期2个月,结束时称重.结果显示:A、B、C三组的均重没有显著差异(p＞0.05),日增重、饲粮消耗量及料重比也没有显著差异(p＞0.05)；A、B、C三组的饲粮消耗量和料重比呈递减趋势,B组的育肥增重成本较A组有明显降低,C组的育肥增重最低,较B组的育肥增重成本也有明显降低.因此适当降低饲粮粗蛋白含量,可以有效降低饲料成本,改善育肥性能,大幅度提高育肥猪的经济效益.

Effect of low level protein diet on the growth performance of finisher pigs

In this study, 120 healthy grower pigs weighing about 25kg were randomly divided into 3 groups with 4 replicates of 10 animals each, to investigate the influence of the low protein diets with different protein levels on the growth performance and the profit. Group A, the control, were fed with the diet of NRC protein level, Group B and C fed diets with their protein content 2% and 3% lower respectively than the control. The experiment period was 30 days. The pigs were weighed and the feed consumed calculated. The result show that there were no significant differences of the average final body weights, the average daily gains, the feed consumption and the feed/gain ratios, among the 3 groups(p>0.05). The feed cost of Group B is much less than that of Group A. The feed cost of Group C is the least. So suitable decrease in dietary protein level in finisher ration can keep the growth performance, reduce the feed cost and increase the profit. Key Words: finisher pig, low protein diet, amino acid balance, performance, profit.