排空强饲法测定鸡饲料表观代谢能值的变异程度及其来源  

Variation and Sources of Variance in Measuring Apparent Metabolizable Energy of Feeds for Broilers Using Empting-Force Feeding Method

作　　者：米宝民[1,2] 赵峰[1] 谭会泽 任立芹[1] 赵江涛 张宏福[1] 杨琳[2] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室,北京100193 [2]华南农业大学动物科学学院,广州510642 [3]广东温氏食品集团有限公司生产技术部,云浮527300

出　　处：《动物营养学报》2012年第11期2172-2180,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家自然科学基金项目(30901037);北京市科技新星计划项(2011098);科技部创新方法工作专项(2009IM033100)

摘　　要：本试验旨在通过研究淀粉饲粮鸡表观代谢能值的变异来源,探讨排空强饲法测定鸡饲料表观代谢能值的精度。试验采用单因素完全随机设计,将48只成年黄羽肉鸡公鸡随机分成2组(每组6个重复,每个重复4只鸡),分别测定强饲量为40和25 g淀粉饲粮的表观代谢能值,共重复测定4个批次。结果表明:1)强饲量为40 g时,4个批次在表观代谢能值上均无显著差异(P>0.05),4个批次表观代谢能值的批内、批间和总变异系数分别为5.39%、1.89%和5.27%;强饲量为25 g时,4个批次在表观代谢能值上具有显著差异(P<0.05),其中第6批次显著地低于第5批次和第7批次的相应值(P<0.05),4个批次表观代谢能值的批内、批间和总变异系数分别为1.97%、1.53%和2.36%。强饲量为25 g时,鸡体重损失、强饲鸡干物质排泄量和强饲鸡总能排泄量的批内、批间和总变异系数均比强饲量40 g时的相应值低。2)在淀粉饲粮表观代谢能值的方差(变异)来源中,当强饲量为40 g时,强饲鸡的干物质排泄量的变异、排泄物总能含量的变异和强饲量的变异对总变异的贡献分别为96.46%、3.23%和0.30%;当强饲量为25 g时,三者的贡献分别为67.72%、24.51%和7.76%。由此可见,强饲量为40 g时,淀粉饲粮表观代谢能值的变异较大,而强饲量为25 g时,其表观代谢能值的变异较小。在表观代谢能值测定的变异来源中,排泄物的质量是主要因素。This experiment was conducted to investigate the precision of empting-force feeding method for measuring the apparent metabolizable energy of corn starch diets in broilers.A single factorial completely randomized design was adapted in this experiment.Forty-eight 18-week-old yellowed-feathered broilers were divided into 2 groups with 6 replicates per group and 4 birds per replicate.The apparent metabolizable energy of corn starch diets was repeatedly determined at a force-feeding amount of 40 or 25 g using empting-force feeding method in 4 batches,respectively.The results showed as follows: 1) in the treatment of 40 g per bird for the force-feeding amount,there was no significant difference in the apparent metabolizable energy determined among 4 batches(P>0.05),and the variation coefficients of within-batch,between batch and total of apparent metabolizable energy were 5.39%,1.89% and 5.27%,respectively;in the treatment of 25 g per bird for the force-feeding amount,there was significant difference in the apparent metabolizable energy determined among 4 batches(P<0.05),the apparent metabolizable energy of corn starch diets determined in the sixth batch was significant lower than that of the apparent metabolizable energy determined in the fifth and seventh batches(P<0.05),and the variation coefficients of within-batch,between batch and total of the apparent metabolizable energy were 1.97%,1.53% and 2.36%,respectively.Compared with the treatment of 40 g per bird for the force-feeding amount,the variation coefficients of within-batch,between batch and total of the body weight losses,dry excreta from force-fed birds and gross energy output from force-fed birds of 25 g per bird for the force-feeding amount were lower.2) In the treatment of 40 g per bird for the force-feeding amount,the contribution of the variance of dry excreta from force-fed birds,gross energy content of excreta from force-fed birds and force-feeding amount to the variance of apparent metabolizable energy of corn starch diets were 96.46%,3.23% and 0.30

关 键 词：鸡 排空强饲法 表观代谢能值 变异 

分 类 号：S816.17[农业科学—饲料科学]