套测法和直接强饲法测定肉雏鸭饲粮中小麦氨基酸及能量营养价值的比较研究  

A Comparison of Substitution Method and Direct Force-Feeding Method for Evaluating Nutritional Value of Amino Acids and Energy of Wheat for Meat Ducklings

作　　者：杜懿婷[1] 高庆[1] 杨玉峰[1] 冯光德[1] 吴承林[1] 

机构地区：[1]四川铁骑力士实业有限公司,冯光德实验室,绵阳621006

出　　处：《动物营养学报》2012年第1期104-110,共7页CHINESE JOURNAL OF ANIMAL NUTRITION

摘　　要：本试验旨在评价肉雏鸭饲粮中小麦氨基酸和能量的营养价值,并比较套测法和直接强饲法测定结果的差异。选取48只15日龄樱桃谷肉鸭(SM3品系),随机分为4个处理,每个处理12个重复,每个重复1只鸭,单笼饲养。处理1为基础饲粮组,处理2为80%基础饲粮+20%小麦组(套测组),处理3为100%小麦组(直接强饲组),处理4为饥饿组,用以测定内源损失。结果表明:1)小麦干物质中的粗蛋白质和总能含量分别为16.09%和18.56 MJ/kg。2)除了谷氨酸、脯氨酸、胱氨酸外,套测法测定的其余氨基酸的表观(真)氨基酸代谢率均高于直接强饲法测得到的结果(P<0.01);套测法和直接强饲法测得的总氨基酸的表观代谢率分别为86.59%和82.42%,真代谢率分别为92.36%和90.80%。3)2种方法测定的能量代谢率和代谢能差异不显著(P>0.05)。套测法测得小麦能量表观代谢率和真代谢率分别为77.51%和86.23%,表观代谢能和真代谢能分别为14.38和16.00 M J/kg;直接强饲法测得小麦能量表观代谢率和真代谢率分别为75.95%和84.81%,表观代谢能和真代谢能分别为14.09和15.74 M J/kg。由此得出,套测法和直接强饲法皆可用于评定小麦代谢能;而使用套算法测定小麦氨基酸代谢率时,合适的替代比例还有待进一步研究。This experiment was conducted to evaluate the nutritional value of amino acids and energy of wheat by substitution method and direct force-feeding method for meat ducklings,and to study the differences between the two methods.Forty-eight 15-day-old ducklings were allotted to 4 treatments with 12 replicates and 1 duckling per replicate in a completely randomized design.The ducklings in treatments 1 to 3 were fed basal diet(basal diet group),80% basal diet+20% wheat(substitution group) and 100% wheat(direct force-feeding group),respectively,and ducklings in the treatment 4 were hungry for detecting endogenous lost.The results showed as follows: 1) in dry matter of wheat,the crude protein content and total energy value were 16.09% and 18.56 MJ/kg,respectively;2) except glutamic acid,proline and cystine,the amino acid availability assayed by the substitution method was higher than that assayed by the direct force-feeding method(P<0.01).The apparent availability of total amino acids were 86.59% and 82.42%,and the true availability of total amino acids were 92.36% and 90.80% assayed by the substitution method and direct force-feeding method,respectively;3) there was no significant difference between the two methods in energy availability and metabolisable energy value(P>0.05).The energy apparent availability,energy true availability,apparent metabolisable energy value and true metabolisable energy value assayed by the substitution method were 77.51%,86.23%,14.38 and 16.00 MJ/kg,respectively,while the energy apparent availability,energy true availability,apparent metabolisable energy value and true metabolisable energy value assayed by the direct force-feeding method were 75.95%,84.81%,14.09 and 15.74 MJ/kg,respectively.There is no significant difference between substitution method and direct force-feeding method in metabolisable energy assay,however,the results of amino acid availability obtained by the substitution method are higher than those obtained by the direct force-feeding method,which indicates that suitable s

关 键 词：肉雏鸭 小麦 氨基酸 能量 代谢率 

分 类 号：S816.15[农业科学—饲料科学]