吉林地方黑鸡公鸡体重和体斜长生长曲线拟合及相关分析

Investigation of Growth Curve Fitness of Body Weight and Body Length of Jilin Local Black Chickens

在不同的营养水平下,运用Logistic模型和Gompertz模型对吉林地方黑鸡公鸡0~16周龄的生长曲线进行了分析和非线性曲线拟合。结果表明:在3个营养水平下,地方黑鸡公鸡的体重累积曲线呈现"S"型,2种生长模型对体重和体斜长的拟合度(R^2)都在0.98以上;在高营养水平的处理组中,Logistic模型对体重生长有更好的拟合;在中低营养组中,Gompertz模型的拟合度与此前的研究相一致;体斜长的拐点周龄明显早于体重的拐点周龄,体重与体斜长呈现极显著相关(P<0.01)。

The growth curves of Jilin local black chicken of 0-16 weeks old were analyzed and fitted with two kinds of non-lineared models in the different nutrition levels. The cumulative curve showed that the weight of local black chicken was ＂s＂ type, the weight and body length of the two growth model fitted growth curves well, which were above 0.98, in high nutrition group, Logistic model was considered to be the better model to fit growth curves, in low nutrition group, the growth curve of Gompertz model were the same with the research before, the turning week point of body length was earlier than that of the weight, weight and body length showed a very significant correlation. This article provide some reference to the Jilin local black chicken.