2010•Acta Ecologiae Animalis DomasticiRequires access

Study on Growth Curve Fitting of Hezuo Pig in Shelter Feeding

Meng Liu

Abstract

Growth and development law has been studied about Hezuo Pig regarded as the research object in shelter feeding.Three unlinear model of Logistic,Richards and Gompertz were used to fit discipline of body weitht.The results indicated that body weight and ratio of born weight increased with age gradually,but relative growth rate decreased with age.Daily weight gain which was 242.5g per day was maximum from 90 day to 120 day of age.Fitting effect of Gompertz was ideal among three kinds of model(R2=0.9995).The adult body weight was 47.02 kg and 59.86 kg for male and female respectively,point of growth inflexion was 118.32 day and 146.75 day for male and female through fitting with Gompertz.

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Key concepts: Gompertz function, Body weight, Animal science, Growth curve (statistics), Mathematics, Growth rate, Logistic regression, Biology