平原饲养的藏鸡体型外貌分析和生长模型拟合的研究

 对在平原饲养的高原型鸡种藏鸡的体型外貌和生长发育规律进行了研究，并利用Logistic和Gompertz两种曲线拟合了其生长模型。研究结果表明，平原饲养的藏鸡公、母鸡在4周龄前生长基本一致，但4周龄后公鸡明显快于母鸡；两种模型的拟合效果均很好，尤其Gompertz模型更佳；公、母鸡的生长拐点分别为75.69日龄和61.91日龄，公鸡的成年体重显著高于母鸡，但达到生长拐点的日龄较母鸡迟。

Analysis of Body Conformation and Fitting Growth Model in Tibetan Chicken Raised in Plain

The altiplano breed, Tibetan chicken which are raised in Beijing was studied on the body conformation and growth rhythm, and the two curves of Logistic and Gompertz model were used to fit the growth model. The results indicate that cocks and hens raised in plain grow basically unanimous before the age of 4 weeks, but the cock grows faster than the hens obviously after age of 4 weeks. The fitting results of two kinds of models are very good, especially Gompertz model is better. The growth inflexion of the cock and hen are the age of 75.69 days, and 61.91 days respectively. The adult live weight of the cock is higher than the hen notably, but the day of inflexion is late to the hen relatively.