不同营养水平日粮对海南黑山羊肥育羔羊生长性能和器官指数的影响

试验旨在研究不同营养水平日粮对海南黑山羊肥育羔羊生长性能和器官指数的影响。采用2×3析因设计,将24只3月龄、体重为(10.56±1.28)kg海南黑山羊随机分成6个处理组,每个处理组4只羊(公、母各半),每只羊为1个重复。6个不同营养水平精饲料处理组分别为:试验1组粗蛋白质(CP)水平为15%、消化能(DE)水平为11.72 MJ/kg,试验2组CP 15%、DE 12.55 MJ/kg,试验3组CP 15%、DE 13.39 MJ/kg,试验4组CP 17%、DE 11.72 MJ/kg,试验5组CP 17%、DE 12.55 MJ/kg,试验6组CP 17%、DE 13.39 MJ/kg,试验期90 d。结果表明,精饲料粗蛋白质水平对试验羊平均日增重影响显著(P<0.05),17% CP日粮组试验羊有较高的平均日增重(P<0.05)和较低的料重比(P<0.05);日粮精饲料蛋白质和能量水平对心脏、肝脏、脾脏、肺脏、肾脏、胃的脏器指数影响均不显著(P>0.05),随着精饲料消化能水平的增加,肠道的脏器指数逐渐减小(P<0.05)。结果提示,补饲不同营养水平精饲料对3月龄海南黑山羊育肥期羔羊平均日增重和料重比均有显著影响(P<0.05),对黑山羊肠道重量及肠道器官指数影响显著(P<0.05),而对其他内脏器官指数无显著影响(P>0.05)。

Effects of Different Nutritional Levels of Diet on the Growth Performance and Organ Indexes in Fattening Hainan Black Goats

This experiment was conducted to investigate the effect of different nutritional levels of concentrate supplementation on the growth performance and organ indexes in Hainan Black goats of three-month-old. The experiment was a 2?3 factorial design. Twenty four lambs with the weight of (10.56?1.28)kg were randomly assigned to 6 treatments with 4 replicates in each treatment of 1 lamb per replicate. The 6 treatment groups were shown as follows:concentrate supplementation with 15% CP and 11.72 MJ/kg DE,15% CP and 12.55 MJ/kg DE,15% CP and 13.39 MJ/kg DE,17% CP and 11.72 MJ/kg DE,17% CP and 12.55 MJ/kg DE,and 17% CP and 13.39 MJ/kg DE. The experiment lasted for 90 days. The results showed that different crude protein levels in concentrate supplementation had significant effect on average daily gain (ADG) (P<0.05). Goats fed concentrate supplementation with 17% crude protein had the higher ADG and the lower feed intake/ body gain (F/G) (P<0.05). Different crude protein and digestive energy levels had no significant effects on organ indexes of heart,liver,spleen,lung,kidney and stomach in goats (P>0.05). The organ indexes of intestine reduced with increasing digestive energy levels in concentrate supplementation (P<0.05). The results demonstrated that different crude protein and digestive energy levels in concentrate supplementation had significant effects on ADG,F/G and organ indexes and weight of intestine for Hainan Black of three-month-old, while for other organ indexes had no effects (P>0.05).