能量水平对生长期陕北白绒山羊生长性能及营养物质消化代谢的影响  

Effects of Energy Level on Growth Performance and Nutrient Digestion and Metabolism of Shanbei White Cashmere Goats during Growth Period

作　　者：黄帅[1] 朱海鲸[1] 史雷[1] 毕台飞[1] 高晔[1] 鲁院院 陈少东[1] 屈雷[1] 

机构地区：[1]榆林学院,陕西省陕北绒山羊工程技术研究中心,榆林719000

出　　处：《动物营养学报》2015年第12期3931-3939,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：陕西省科技统筹创新工程计划项目(2014KTDZ02-01;2015KTTSNY04-05);榆林市产学研合作项目(2012cxy1-11);2015年陕西省农业厅“农业科技创新转化资金项目”

摘　　要：本试验旨在研究陕北白绒山羊生长期饲粮适宜的能量水平。选取体况良好、体重相近的5月龄陕北白绒山羊32只（公母各占1/2）,采用单因子随机区组设计分为4组。各组试验羊饲喂粗蛋白质水平为11.16%,消化能水平分别为9.33（Ⅰ组）、10.49（Ⅱ组）、11.66（Ⅲ组）和12.61 M J/kg（Ⅳ组）的饲粮,进行为期60 d的饲养试验和为期14 d的消化代谢试验。结果表明：1）母羊Ⅲ组的实际摄入消化能水平最高,但各组间差异不显著（P〉0.05）;公羊Ⅲ组的实际摄入消化能和母羊Ⅲ组的实际摄入粗蛋白质水平均显著高于其他3组（P〈0.05）;公羊Ⅲ组的实际摄入粗蛋白质水平显著高于Ⅳ组（P〈0.05）。2）试验羊Ⅲ组的干物质采食量均最高;饲粮能量水平对平均日增重和料重比的影响不显著（P〉0.05）。3）试验羊增重收益以Ⅲ组最高;毛收益Ⅰ组最高,Ⅲ组次之。4）母羊Ⅳ组粗蛋白质的表观消化率显著高于Ⅰ组（P〈0.05）,干物质表观消化率各组之间无显著差异（P〉0.05）;公羊Ⅲ组的粗蛋白质表观消化率显著高于Ⅰ组（P〈0.05）,Ⅲ、Ⅳ组干物质的表观消化率显著高于Ⅰ组（P〈0.05）。5）试验羊Ⅲ组的摄入总能和消化能均最高,而Ⅳ组粪能均最低;公羊能量消化率Ⅲ、Ⅳ组均显著高于Ⅰ、Ⅱ组（P〈0.05）,而母羊能量消化率各组之间比较差异不显著（P〉0.05）。6）试验羊血液游离脂肪酸和β-羟丁酸的含量以Ⅳ组最低;试验羊Ⅲ组血液葡萄糖和总蛋白含量均最高,而尿素氮含量最低。综上,5～6月龄陕北白绒山羊饲粮能量水平以不低于11.63 MJ/kg为宜。This experiment was conducted to study the optimal energy level of Shanbei white cashmere goats during growth period. Thirty two（ half male and half female） healthy 5-month-old goats with similar body weight were selected and divided into 4 groups（ Ⅰ,Ⅱ,Ⅲ and Ⅳ） by a single-factor random block design.The crude protein（ CP） level was 11. 16 %,and groups Ⅰ,Ⅱ,Ⅲ and Ⅳ were fed four diets differed in digestive energy（ DE）（ 9. 33,10. 49,11. 66 and 12. 61 MJ / kg,respectively）. The feeding experiment lasted for 60 days,and then digestive and metabolic experiments were conducted for 14 days. The results showed as follows： 1） group Ⅲ of ewes had the greatest actual DE intake level（ P〈0. 05）,the actual DE intake level of rams and the actual CP intake level of ewes in group Ⅲ were the greatest among four groups（ P〈0. 05）,and the actual CP intake level of rams in group Ⅲ was significantly higher than that in group Ⅳ（ P〈0. 05）. 2）Group Ⅲ of goats had the greatest dry matter intake（ DMI）; dietary energy level had no significant influence on average daily gain（ ADG） and feed to gain ratio（ F / G）（ P〈0. 05）. 3） Gain benefit in group Ⅲ was the greatest among four groups,nevertheless,the gross returns in group Ⅰ was the greatest among four groups,followed by group Ⅲ. 4） Apparent digestibility of CP of ewes in group Ⅳ was significantly higher than that in group Ⅰ（ P〈0. 05）,and no significant difference was observed for apparent digestibility of dry matter among four groups（ P〈0. 05）; apparent digestibility of CP of rams in group Ⅲ was significantly higher than that in group Ⅰ（ P〈0. 05）,and that of DMof rams in group Ⅲ and Ⅳ was significantly higher than that in group Ⅰ（ P〈0. 05）. 5） The gross energy（ GE） and DE intakes in group Ⅲ was the greatest among four groups,and fecal energy in group Ⅳ was the lowest; energy digestibility of rams in groups Ⅲ,Ⅳ was significantly higher than that i

关 键 词：陕北白绒山羊 能量水平 生长性能 营养物质消化代谢 血液指标 

分 类 号：S826[农业科学—畜牧学]