湘黄鸡生长及体成分沉积规律研究  

Study on Rule of Growth and Body Composition Deposition of Hunan Yellow Chicken

作　　者：陈凯 张旭 吴聪 罗志嘉 文野 谭智阳 张慧 马玉勇 戴求仲 CHEN Kai;ZHANG Xu;WU Cong;LUO Zhijia;WEN Ye;TAN Zhiyang;ZHANG Hui;MA Yuyong;DAI Qiuzhong(Hengyang Academy of Agricultural Sciences,Hengyang 421001,China;Hunan Institute of Animal and Veterinary Science,Changsha 410128,China;Hunan Polytechnic of Environment and Biology,Hengyang 421005,China)

机构地区：[1]衡阳市农业科学院,衡阳421001 [2]湖南省畜牧水产研究所,长沙410128 [3]湖南环境生物职业技术学院,衡阳421005

出　　处：《动物营养学报》2024年第11期7003-7014,共12页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：现代农业产业技术体系专项资金(湘农发[2022]31);衡阳市科技创新项目(202250045207)。

摘　　要：本试验旨在充分利用各曲线模型载荷信息,对家禽生长发育过程进行深入研究,对3种生长模型曲线进行求导解析,为湘黄鸡生长阶段划分和精准营养调控提供参考。本试验选用健康、体重相近的1日龄湘黄鸡300只,分为6个组,每组50只。试验期为20周,每周抽取12只鸡测定体重,抽取6只鸡麻醉致死后粉碎待测体成分干物质(DM)、粗蛋白质(CP)、粗脂肪(EE)、粗灰分(Ash)含量和总能(GE),并使用Logistic、Gompertz和Bertalanffy 3种生长模型对湘黄鸡体重和体成分沉积进行拟合分析,计算出各个拐点周龄(IPA)以及对应的拐点体重(IPW)和拐点体成分(IPBC)。结果表明:湘黄鸡体重生长曲线最佳拟合模型为Gompertz(R 2>0.99),其IPA公母混合分别为2.16、8.28和14.40周龄;公鸡分别为2.51、8.01和13.50周龄;母鸡分别为1.68、8.72和15.77周龄。IPW公母混合分别为116.80、588.59和1091.17 g;公鸡分别为123.72、623.47和1155.83 g;母鸡分别为111.89、563.88和1045.35 g。湘黄鸡体成分沉积曲线最佳拟合模型是Logistic(0.96<R^(2)<0.97),其IPA分别为4.91~5.58周龄、9.30~9.61周龄和13.65~13.74周龄。根据体重生长曲线拟合结果可知,湘黄鸡生长阶段可划分为0~2周龄、3~8周龄、9~14周龄和15周龄至上市4个阶段;而根据体成分沉积曲线拟合结果可知,湘黄鸡生长阶段可划分为0~5周龄、6~9周龄、10~13周龄和14周龄至上市4个阶段;但是根据拟合度结果来看,体重拟合曲线阶段划分更具有可信度。This experiment fully utilizes the load information of each curve model to conduct in-depth study on the growth and development process of poultry,and analyzes the derivation of the three growth model curves to obtain the three inflection points of the curves,which can provide references for the division of growth stages and the precise nutritional regulation of Hunan yellow chickens.A total of 300 one-day-old healthy Hunan yellow chickens with similar body weight were selected and divided into 6 goups with 50 chickens per group.The experiment lasted for 20 weeks.Twelve chickens were selected weekly for body weight measurement,and 6 chickens were anesthetized to death and crushed for body composition—dry matter(DM),crude protein(CP),ether extract(EE),crude ash(Ash)and gross energy(GE).Three growth models,Logistic,Gompertz and Bertalanffy were used to fit the body weight and body composition deposition of Hunan yellow chickens,and to calculate inflection point weeks of age(IPA),inflection point weight(IPW)and inflection point body composition(IPBC).Results showed that the optimal fitting model for the body weight growth curve of Hunan yellow chickens was Gompertz(R 2>0.99),with IPA for male+female at 2.16,8.28 and 14.40 weeks of age;for males at 2.51,8.01 and 13.50 weeks of age;and for females at 1.68,8.72 and 15.77 weeks of age.The IPW for male+female was 116.80,588.59 and 1091.17 g;for males was 123.72,623.47 and 1155.83 g;and for females was 111.89,563.88 and 1045.35 g.The best fitting model for the body composition deposition curve of Hunan yellow chicken was Logistic(0.96<R 2<0.97),with IPA of 4.91 to 5.58 weeks of age,9.30 to 9.61 weeks of age and 13.65 to 13.74 weeks of age,respectively.According to the fitting results of body weight curve,it can be concluded that the growth stages of Hunan yellow chickens can be divided into four stages:0 to 2 weeks of age,3 to 8 weeks of age,9 to 14 weeks of age and 15 weeks of age to market.And according to the fitting results of body composition deposition curve,it ca

关 键 词：湘黄鸡 生长曲线拟合 体成分沉积 

分 类 号：S831[农业科学—畜牧学]