高粱在肉鸡中表观代谢能和氨基酸表观代谢率预测模型的研究

发布时间：2018-01-26 07:22

本文关键词： 高粱表观代谢能氨基酸表观代谢率肉鸡预测方程　出处：《中国畜牧杂志》2017年10期 　论文类型：期刊论文

【摘要】：本试验旨在通过肉鸡代谢试验建立高粱常规营养成分与表观代谢能(AME)和氨基酸表观代谢率的回归方程,为生产提供高粱AME和氨基酸表观代谢率估算方法。试验选择单宁含量差异较大的美国高粱和阿根廷高粱,配制成4种不同单宁含量的高粱样品,按不同比例(25%、50%)替代基础饲粮组成代谢饲粮。选用270只21日龄AA+商品雄性肉鸡,随机分为9个处理,每个处理6个重复,每个重复5只鸡。用全收粪法和回归法测定高粱AME和氨基酸表观代谢率,并采用逐步回归法建立AME和氨基酸表观代谢率与常规营养成分的回归方程。结果表明:4种高粱的AME分别为13.41、12.92、12.60、12.72 MJ/kgDM;异亮氨酸、亮氨酸和苯丙氨酸的表观代谢率均值分别为0.59%、59.77%、49.01%。按逐步回归法建立高粱在21日龄AA+雄性肉鸡的AME和氨基酸表观代谢率的最佳预测方程分别为:AME=9.345+1.536×EE(R~2=0.957,P=0.022);异亮氨酸表观代谢率=127.317-32.600×Ash(R~2=0.948,P=0.026);亮氨酸表观代谢率=-878.663+10.695×DM(R~2=0.995,P=0.002);天门冬氨酸表观代谢率=45.160+6.185×CF(R~2=0.943,P=0.029);酪氨酸表观代谢率=194.381-81.143×Ash(R~2=0.914,P=0.044)。方程计算所得高粱AME和氨基酸表观代谢率的预测值与实测值差异不显著,方程可用。本试验条件下,可通过高粱常规营养成分对高粱的AME和氨基酸表观代谢率进行有效预测。
[Abstract]:The purpose of this experiment was to establish regression equations of routine nutrition composition and apparent metabolic energy (AME) and apparent amino acid metabolic rate of sorghum by metabolic test of broiler. To provide a method for estimating the apparent metabolic rate of AME and amino acids in sorghum, four sorghum samples with different tannin contents were prepared from American sorghum and Argentine sorghum. 270 male 21-day-old AA broilers were randomly divided into 9 treatments with 6 replicates each. AME and amino acid apparent metabolic rate of sorghum were determined by total fecal collection and regression method. Stepwise regression method was used to establish the regression equations of the apparent metabolic rate of AME and amino acid as well as the normal nutritional components. The results showed that the AME of the four species of sorghum were 13.41 ~ 12.92 ~ 12.60, respectively. 12.72 MJ / kg DM3; The average apparent metabolic rates of isoleucine, leucine and phenylalanine were 0.59% and 59.77%, respectively. According to the stepwise regression method, the best prediction equation of apparent metabolic rate of AME and amino acid in 21-day-old AA broilers of sorghum was established as:: AME-9.345, respectively. 1.536 脳 EE (. RX 2N 0.957. P0. 022; The apparent metabolic rate of iso-leucine was 127.317-32.600 脳 Asho Rao _ (2) (0.948) P ~ (2 +) 0.026 ~ (-1); The apparent metabolic rate of leucine was -878.663 10.695 脳 DMN 0.995Pu 0.002; The apparent metabolic rate of aspartic acid was 45.160 6.185 脳 CFR ~ (2 +) ~ (0.943) (P ~ (0.029)); The apparent metabolic rate of tyrosine was 194.381-81.143 脳 Ash(R~2=0.914. The predicted value of AME and amino acid apparent metabolic rate of sorghum was not significantly different from the measured value, and the equation was available. The AME and apparent amino acid metabolic rate of sorghum can be effectively predicted by the conventional nutrient components of sorghum.
【作者单位】：中国农业大学动物科技学院动物营养学国家重点实验室;中国乡镇企业总公司;
【基金】：教育部创新团队计划项目(IRT0945)
【分类号】：S831.5
【正文快照】： 高粱是一种可以替代玉米的能量饲料[1],尤其是近年来,国外进口高梁数量猛增,高粱越来越多的被应用于畜牧饲料行业[2],建立高粱在肉鸡中表观代谢能和氨基酸表观代谢率预测方程,对于快速有效地评定高粱生物学效价和精准配制饲料具有重要的意义。对于家禽玉米表观代谢能(AME)等

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