张家界白羽乌鸡生长曲线拟合及分析  

Fitting and Analysis of Growth Curve of Zhangjiajie White-feathered Black Chicken

作　　者：文霜 陈功建 杨洁 郭松长[1] 刘锡兵 蒋隽[1] WEN Shuang;CHEN Gongjian;YANG Jie;GUO Songchang;LIU Xibing;JIANG Jun(College of Animal Science and Technology,Hunan Agricultural University,Changsha,Hunan 410128,China;Zhangjiajie Animal Husbandry and Fisheries Affairs Center,Zhangjiajie,Hunan 427000,China)

机构地区：[1]湖南农业大学动物科技学院,湖南长沙410128 [2]张家界市畜牧水产事务中心,湖南张家界427000

出　　处：《家畜生态学报》2025年第2期22-27,共6页Journal of Domestic Animal Ecology

基　　金：张家界白羽乌鸡保种与开发利用项目(2021016)。

摘　　要：为探讨张家界白羽乌鸡最佳生长曲线模型,了解其生长发育规律。试验选取150羽公鸡和150羽母鸡,分别测定其0、2、4、6、8、10、13、22各周龄体重,随后采用Logistic、Gompertz和Von Bertalanffy 3种非线性模型分别对张家界白羽乌鸡公鸡和母鸡进行生长曲线拟合,并分析不同周龄生长速度、生长强度的趋势变化。结果表明:(1)3种拟合模型中,公、母鸡均以Gompertz模型拟合为最佳,其拟合优度R^(2)(♂=0.99998,♀=0.99999)最接近1、均方误差(MSE)(♂=11.0374,♀=6.7709)和平均绝对误差(MAE)(♂=2.1263,♀=1.8300)最小,满足模型拟合质量评估标准。(2)经模型拟合值与实测值的可行性分析显示:两者累积生长差值在1~5 g之间,差异较小;相对生长强度均在第2周龄出现最大峰值,但公鸡(9.0周龄)进入生长拐点时间迟于母鸡(8.1周龄),具体为649.38 g和518.68 g,占体成熟比例的42.27%和40.52%,22周龄公、母鸡上市体重分别为1536.45 g和1278.65 g。研究结果发现,最佳模型Gompertz可作为依据,建立张家界白羽乌鸡的标准生长曲线。To explore the optimal growth curve model for Zhangjiajie white-feathered black chicken and understand its growth and development patterns,this study selected 150 roosters and 150 hens,and measured their body weights at 0,2,4,6,8,10,13,and 22 weeks of age.Subsequently,three nonlinear models,namely Logistic,Gompertz,and Von Bertalanffy,were used to fit the growth curves of these roosters and hens.The trends in growth rate and growth intensity at different ages were also analyzed.The results showed that(1)among the three fitting models,both roosters and hens were best fitted by the Gompertz model,with the goodness of fit R^(2)(roosters=0.99998,hens=0.99999)closest to 1,and the mean square error(MSE)(roosters=11.0374,hens=6.7709)and mean absolute error(MAE)(roosters=2.1263,hens=1.8300)being the smallest,meeting the quality evaluation criteria for model fitting.(2)Feasibility analysis of the fitted values and the measured values showed that the cumulative growth difference between the two was between 1 to 5 grams,indicating minimal discrepancies.The relative growth intensity peaked at the 2nd week but the inflection point for growth occurred later in roosters(9.0 weeks)than in hens(8.1 weeks),specifically at 649.38 g and 518.68 g,accounting for 42.27%and 40.52%of the body maturity ratio,respectively.The market weights for roosters and hens at 22 weeks were 1536.45 g and 1278.65 g,respectively.The study found that the Gompertz model is the optimal model and can be used as the basis for establishing the standard growth curve for Zhangjiajie white-feathered black chicken.

关 键 词：Gompertz模型 生长曲线 生长拐点 张家界白羽乌鸡 

分 类 号：S831.2[农业科学—畜牧学]