黑土区主要粗饲料及其组合对绵羊日粮养分消化及生长性能的影响

选用12只无角陶塞特×夏洛莱的杂交一代雄性绵羊(7～7.5月龄,体质量40.58 kg±1.17 kg),采用单因素随机区组试验设计,研究不同精粗饲料组合对绵羊日粮养分消化及生产性能的影响.在精料供给量一致的条件下,按粗料来源不同分成4组:对照组(100%玉米秸秆)、试验组Ⅰ(100%豆皮)、试验组Ⅱ(50%玉米秸秆+50%豆皮)、试验组Ⅲ(50%玉米秸秆+50%苜蓿鲜草),每个处理组3只,试验期60d.结果表明,试验组Ⅱ、试验组Ⅲ均较对照组显著提高了日粮有机质(OM)、蛋白质(CP)、中性洗涤纤维(NDF)表观消化率(P<0.05),试验组Ⅲ较对照组显著提高了日粮干物质(DM)表观消化率(P<0.05),各组间酸性洗涤纤维(AOF)表现消化率无显著差异(P>0.05);试验组Ⅲ较对照组、试验组Ⅰ日增重显著,分别提高48.47%(P<0.05)、32.29%(P<0.05).综上,玉米秸秆、豆皮及苜蓿鲜草之间存在显著的粗饲料原料间的正组合效应,三者间的其它组合方式及最佳比例有待在此研究基础上开展深入研究.表3,参11.

Feed Associate Effects on Nutrient Degradability and Production Performance in Sheep in Black Soil Area

Twelve male Polled Dorset × Charolais F1 sheep(7- 7.5 months old,40.58 kg±1.17 kg weight) were used in a completely ran-damized design to determine effects of different forage associates on nutrient degradability and production petrol. Under the same concen-trated feed condition,four different rations were organized as comparison group ( 100% corn straw) ,group Ⅰ ( 100% soybean hull) ,group Ⅱ (50% corn straw + 50%soybean hull) ,groupⅢ (50% corn straw + 50% alfalfa). Twelve sheep were randomly divided into four groups with 3 sheep per group and the experiment lasted for 60 days. The result showed that the apparent digestibilities of OM, CP and NDF of group Ⅱ and groupⅢ were significant improved ( P <0.05) compared with comparison group. The apparent digestibilities of DM of groupⅢ was significant improved ( P < 0.05) compared with comparison group and the apparent digestibilities of ADF of all groups were not significant improved ( P >0.05). The growth performance of group Ⅲ was improved at 48.47 % ( P < 0.05) ,32.29% (P < 0. 05) than comparison group and group Ⅰ,respectively. It indicated that corn straw,soybean hull and alfalfa existed remarkable positive feed associate effect,the other associated ways and the best combination should be further investigated on the base of this research.