摘要
旨在研究0～56日龄快速型黄羽肉鸡湘佳黄鸡2号的生长规律及营养物质动态沉积规律,构建体重、日增重的生长曲线以及能量、体蛋白、体脂肪、总氨基酸等养分的沉积模型,为快速型黄羽肉鸡的精准饲养提供科学依据.本研究选择同批次出雏、健康的0日龄快速型黄羽肉鸡湘佳黄鸡2号672只(公母各半),于第0、7、14、21、28、35、42、49、56日龄分别对公鸡和母鸡进行生长性能及体成分测定.结果发现,随日龄增加,湘佳黄鸡2号公鸡和母鸡的体重、空体重、羽毛重、日增重、能量沉积量、体蛋白沉积量、体脂肪沉积量和总氨基酸沉积量均显著升高(P＜0.001).分别采用Gompertz、Logistic和Bertalanffy三种非线性函数对体重、日增重和能量、体蛋白、体脂肪及总氨基酸等养分的重量进行拟合,根据回归模型的决定系数、残差平方和、均方误差和赤池信息准则的值判断模型准确性,结果表明,Gompertz模型对各项指标的拟合准确性最高.利用Gompertz函数公式,拟合并建立了湘佳黄鸡2号体重和日增重的生长曲线,同时构建了能量、体蛋白、体脂肪及总氨基酸的重量的生长或沉积模型.本研究发现,Gompertz模型能精准预测湘佳黄鸡2号的体重、日增重及体成分的需要量增长规律,这为湘佳黄鸡2号的能量、脂肪、蛋白质和氨基酸的动态需要量研究和精准饲养提供了数据支撑.
Abstract
The purpose of this study was to investigate the growth pattern and dynamic nutritional deposition pattern of rapidly-growing yellow-feathered chickens(Xiangjia Yellow Chicken No.2)at 0-56 days of age.Aim to establish growth curves of body weight(BW)and average daily gain(ADG),deposition models of energy(TE),body protein(BP),body fat(BF),total amio acids(TAA).In order to provide scientific proof for accurate feeding of rapidly-growing yellow-feath-ered chickens.In this study,672 healthy 0-day-old rapidly-growing yellow-feathered chickens(No.2 Xiangjia,half male half female)were selected from the same batch of chicks.The growth performance indexes and body composition of male or female chickens were measured at the 0th,7th,14th,21st,28th,35th,42nd,49th,and 56th days of age.The results showed that BW,empty weight(EW),feather weight(FW),ADG,and the deposition of TE,BP,BF and TAA of chickens were significantly increased with the age(P＜0.001).The growth curves of BW,EW,FW and ADG,and the model for the weights and deposition of TE,BP,BF,and TAA were used to fit by three non-linear regression model,Gompertz,Logistic and Bertalanffy.Based on the coefficients of determination,residual sum of squares,mean squared error and the red pool information criterion of the regression model,the Gompertz model was more accurate than Logistic or Bertalanffy model.Using the Gompertz function equation,growth curves for BW,ADG,and the model for deposition of TE,BP,BF and TAA were developed for the Xiangjia No.2 yellow-feathered chickens.In conclusion,Gompertz model can accurately predict BW,ADG and the nutrient weights and deposition of the Xiangjia No.2 yellow feathered chicken,and also provide a basis for the study of its nutrient dynamic requirements and precise feeding.
基金项目
国家重点研发计划(2021YFD1300404)
国家现代农业产业技术体系(CARS-41-Z08)
湖南省家禽产业技术体系()
维普
万方数据