波尔山羊育肥期能量和蛋白质营养需要的研究

精选 1 35只 3月龄断奶的波尔山羊公羔分成 3组 ,每组 45只 ,每组设 3个重复。设计Ⅰ、Ⅱ、Ⅲ组试验日粮的波尔山羊目标增重水平分别为 2 50 ,2 0 0和 1 50 g/d。结果 3组日增重分别达 2 2 3 ,1 79和 1 50g/d。根据Ⅰ、Ⅱ、Ⅲ组试验数据得出波尔山羊干物质采食量 (DMI,g/d)、粗蛋白质采食量 (CPI,g/d)、瘤胃降解蛋白 (RDP ,g/d)、瘤胃非降解蛋白 (UDP ,g/d)及消化能采食量 (DEI ,KJ/d)与羔羊日增重 (ΔW ,g/d)的回归关系 ,并根据回归方程求出波尔山羊育肥期 (3～ 5月龄 ) 0～ 2 50 g日增重的能量和蛋白营养需要量 ,为制订我国的波尔山羊饲养标准提供参考依据

Studies on energy and protein requirements of growing Boer goats

In order to study energy and protein requirements of stall-feeding Boer goats, 135 growing male Boer goat weaned at the age of 3 months were divided into three groups, 45 animals in each group with 3 repeats. Each group was fed with three different nutritive levels of meal rations for expected average daily gain at 250 g/d, 200 g/d and 150 g/d. The results of the mean daily gain of group Ⅰ, Ⅱ, Ⅲ were 223 g/d, 179 g/d, 150 g/d respectively. According to these result, we analyzed relationship of dry matter intake (DMI, g/d), digestible energy intake (DEI, KJ/d), crude protein intake (CPI, g/d), ruminal degradable protein (RDP, g/d) or ruminal undegradable protein (UDP, g/d) to average daily gain (ΔW, g/d) of the goats. By the regression equations, we obtained energy and protein requirements of the goats aged at 3～5 months when the average daily gain stage is ranged from 0 to 250 g/d. The results could serve as the reference for drafting the energy and protein requirements for the goats as national agricultural recommendatory standard.