皮特兰猪生长发育规律及其生长曲线拟合分析

doi:10.16431/j.cnki.1671-7236.2017.06.024

Abstract

Abstract:

This experiment was aimed to study the growth development and fit the growth curve of Pietrain pig. The body weight records were collected by Osborne FIRE system to study its regularity growth development (122 boars and 129 sows).The rapid growth period was centralized between 110 and 150 d, and the growth of Pietrain pig was fitted the typical S-curve. The relative growth intensity was higher for younger pigs, then decreased gradually. Three non-linear models including Logistic,Bertalanffy and Gompertz were utilized to fit the growth curve of Pietrain pig, though all the three models had good fitness,and R²of the models (Logistic,Bertalanffy,Gompertz) for sow were 0.9815, 0.9589 and 0.9698, respectively. The results showed Logistic model played better for achieving the real observations. According to the fitting growth curve, the age of inflection value of boar and sow were 114.72 and 114.89 d,the weight of inflection value were 65.30 and 63.00 kg, the highest daily gain were 1.051 and 0.983 kg/d,respectively.

Key words: Pietrain pig; growth curve; growth development

CLC Number:

S828

ZHANG Jin-shan, WU Qun-qing, ZHANG Yue-bo, ZHANG Long-chao, WANG Li-xian. Analysis of Growth Development and Growth Curve Fitting of Pietrain Pig[J]. , 2017, 44(6): 1746-1753.

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Analysis of Growth Development and Growth Curve Fitting of Pietrain Pig

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