动物营养学报Issue(8)：2176-2183,8.DOI:10.3969/j.issn.1006-267x.2014.08.020
饲粮色氨酸水平对生长肉兔生产性能及血清生化指标的影响
Effects of Dietary Tryptophan Level on Performance and Serum Biochemical Indices of Growing Meat Rabbits
摘要
Abstract
This experiment was conducted to study the effects of dietary tryptophan level on performance and serum biochemical indices of growing meat rabbits in a certain level of digestible energy,in order to determine the appropriate level of dietary tryptophan. A total of 112 healthy New Zealand growing meat rabbits with an average body weight of(1 099.14±54.01)g were randomly assigned to 8 groups with 7 replicates per group and 2 rabbits per replicate. Rabbits in the 8 groups were fed experimental diets containing 0.165%,0.175%, 0.185%,0.195%,0.205%,0.215%,0.225% and 0.235% tryptophan,respectively. The experiment lasted for 7 days for adaptation and 28 days for test. The results showed as follows:1)dietary tryptophan level had significant influences on average daily feed intake( ADFI)and feed/gain( F/G)( P<0.05),and had a ex-tremely significant influence on average daily gain( ADG)of growing meat rabbits( P<0.01). The ADFI and ADG had the maximum values and the F/G had the minimum value in the group with the diet containing 0.205% tryptophan. 2)Dietary tryptophan level had extremely significant influences on serum urea nitrogen and insilin-like growth factor-Ⅰ contents of growing meat rabbits( P<0.01). The serum urea nitrogen content had the minimum value and the serum insulin-like growth factor-Ⅰ content had the maximum value in the group with the diet containing 0.205% tryptophan. The contents of total protein and albumin in serum of grow-ing meat rabbits were not significantly affected by dietary tryptophan level( P>0.05). Considering all indices of this experiment,when digestible energy level is 10. 48 MJ/kg in the diet,the appropriate level of dietary tryptophan of growing meat rabbits is 0.205%( measured value is 0. 196%).关键词
生长肉兔/色氨酸/需要量/消化能/生产性能/血清生化指标Key words
growing meat rabbit/tryptophan/requirement/digestible energy/performance/serum biochemi-cal indices分类
农业科技引用本文复制引用
王滔,贾刚,雷怀刚,李锐,王康宁..饲粮色氨酸水平对生长肉兔生产性能及血清生化指标的影响[J].动物营养学报,2014,(8):2176-2183,8.基金项目
四川农业大学双支计划 （）
