关键词: 绿壳蛋鸡, 基础群, 生产性能, 产蛋曲线

Abstract: [Objective] The purpose of the experiment is to study the production performance of the green eggshell layers. [Method] In this study, 1 200 green eggshell layers were adopted. We recorded the following laying traits, the age at first egg, the body weight at first egg, the first egg weight, body and egg weight at 261 days old, rate of green egg, the total egg number for 261 days, and rate of weekly laying. [Results] Results indicated that the mean age of laying the fist egg was 148 d and the body weight and egg weight were 1 338.3 g and 35.8 g, respectively. The weights of body and egg at 261 d were 1 490.2 g and 35.9 g, respectively. The total egg number for 261 d was 35.98 and the highest one is 84. The rate of green egg was 90.39%. The greatest weekly laying rate is 64.99%;the total egg number was in the range of 40 to 49 for the most individuals. The weekly laying rate steady increased in the first several laying weeks. After 27 week, the laying rate curve fluctuated sharply, which mainly ranged from 30.82% to 50.23%. Laying rates reached to the egg laying peak at 30 week. [Conclusion] The laying rates vary largely among the individuals of this group. And this can be improved with the increase of selection intensity.

Key words: green eggshell layers, basic group, production performance, production curve