关键词: “豫粉1号”商品代; 产蛋率; 拟合曲线; 蛋品质  

Abstract:

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:y_t=0.327×2.2t×e^－0.067t;McMillan model:y_t=159.19×(1－e^{－0.199×(t－17.612)})×e^－0.019t;Yangning model:y_t=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.

Key words: Yufen Ⅰ commercial line; laying rate; fitting curve; egg quality