“豫粉1号”配套系商品代蛋鸡产蛋率曲线拟合及蛋品质分析

Fitting Curve of Laying Rate and Egg Quality Analysis of Yufen Ⅰ Commercial Line

为探索"豫粉1号"商品代的产蛋性能和蛋品质等生产特性的变化规律,采用Wood模型、杨宁模型和McMillan模型对产蛋率曲线进行拟合分析;并对32、36、40周蛋品质进行分析。结果显示,3种模型的非线性方程为:Wood模型:y_t=0.327×2.2t×e^(-0.067t);McMillan模型:y_t=159.19×(1-e^(-0.199×(t-17.612)))×e^(-0.019t);杨宁模型:yt=0.284×e^(-0.284t)/(1+e^(-0.302×(t-20.779))),拟合度分别为0.885、0.987和0.991。与实际生产数据相比,杨宁模型拟合值与观测值最为接近,拟合效果最佳。蛋品质分析结果显示,"豫粉1号"商品代蛋品质的哈氏单位达到82.61,为AA级;蛋壳强度达到4.77kg/m^2,具有较高的强度;蛋黄颜色为8.72,色泽比普通鸡蛋深。在实际生产中可以利用杨宁模型对该品系产蛋率的变化规律进行估计与预测,为地方蛋鸡新品系的育种及管理提供参考,蛋品质可在后期配套系运用中进行优化。

In order to explore the changing rules of egg production and egg quality of Yufen Ⅰ commercial line,the Wood model,Yangning model and McMillan model were used to fit the curve of egg production rate,and the qualities of eggs at 32,36 and 40 weeks were analyzed. The non-linear equation of three kinds of model showed as follows：Wood model：yt=0.327×2.2t×e-0.067t;McMillan model：yt=159.19×（1-e-0.199×（t-17.612））×e-0.019t;Yangning model：yt=0.284×e-0.284t/（1＋e-0.302×（t-20.779））,and the R2 were 0.885,0.987 and 0.991,respectively.Compared with the actual production data,the fitting value of Yangning model was the closest to the observed value,and the fitting effect was the best.The results of egg quality analysis showed that the Haugh unit of Yufen Ⅰ was 82.61, reached the AA level.Eggshell strength reached 4.77 kg/m2 with high strength.The color of egg yolk was 8.72,deeper than the ordinary eggs.These results indicated that Yangning model could be used to estimate and forecast the variation of laying rate of the strain in the actual production. It could provide reference for the breeding and management of new breed of local layers. The egg quality could be optimized in the later matching system.