期刊论文

中文

中国农业科学

0578-1752

2010

43

19

4101-4108

10.3864/j.issn.0578-1752.2010.19.024

国家“863”计划项目（2008aa101008）； 湖南省科技厅重点攻关项目（04NK2005）；

本校为第一机构

【目的】定量描述和估计本地番鸭体重生长的轨迹和参数。【方法】本研究对116只番鸭进行了21weeks的饲养和观测;利用5种生长函数(Gompertz、Logistic、VonBertalanffy、Richards和Brody)拟合了番鸭体重生长的非线性混合效应模型;分别计算了这些模型的8个生长参数(成熟体重、拐点日龄、拐点体重、初生体重、绝对生长率、相对生长率、绝对成熟率和相对成熟率);根据信息准则、误差方差的大小和生长参数估计值的准确度,比较了不同模型间的拟合和估计结果。【结果】与非线性固定效应模型比较,5种非线性混合效应模型拟合的番鸭体重生长方程和估计的8个生长参数,其准确度整体上提高了许多;全群番鸭体重...

Objective The aim of the study is to describe and estimate the trajectory and parameters of body weight growth of native Muscovy.Method One hundred and sixteen Muscovy ducks were fed and observed for 21 weeks,five body weight growth functions including Gompertz,Logistic,Von Bertalanffy,Richards,and Brody were estimated,nonlinear mixed effect models were fitted to data of body weight in Muscovy,and the 8 growth parameters including mature weight,Point ofinflection（POI）,POI weight,birth weight,absolute growth rate,relative growth rate,absolute ...