快慢羽太行鸡生长规律和Logistic生长曲线拟合分析

Growth Character and Logistic Growth Curve Fitting Model of the Early and Late Feathering Taihang Chickens

为了解快慢羽太行鸡的生长发育规律,对其体重和体尺指标及其相关性以及Logistic拟合生长曲线进行分析。结果表明:慢羽公鸡生长最快,其次为快羽公鸡,快羽和慢羽母鸡相似最低,其Logistic生长曲线分别为Y=1.760/(1+13.445e-0.034t)、Y=1.519/(1+14.066e-0.036t)、Y=1.377/(1+11.503e-0.031t)和Y=1.314/(1+10.286e-0.031t)。当快羽母鸡生长到77~79日龄体重达到0.698 kg左右,慢羽母鸡生长到74~76日龄体重达到0.657 kg左右,快羽公鸡生长到72~74日龄体重达到0.760 kg,慢羽公鸡生长到75~77日龄体重达到0.880 kg,此时有最大的生长速率。

To study the growth and development character of the early and late feathering Taihang chickens, body weight and size and their correlation and Logistic growth curve fitting model were analyzed. Results showed that the late feathering male Taihang chicken had the fastest growth rate, and the early feathering male Taihang chickens growed faster, while the early and late feathering female Taihang chickens had the slowest growth rate. The Logistic growth fitting curve were Y=1.760/（1＋13.445e-0.034 t）, Y=1.519/（1＋14.066e-0.036 t）, Y=1.377/（1＋11.503e-0.031 t） and Y=1.314/（1＋10.286e- 0.031 t） respectively. The weight and the age of the four various chickens that had the highest growth rate were predicted to be 0.698 kg and 77-79 day,0.657 kg and 74-76 day,0.760kg and 72-74 day,0.880 kg and 75-77 day respectively.