【摘要】 对 RF系白番鸭蛋重与受精率 ,孵化率及初生重 ;见蛋日龄、性成熟期和产蛋率 ;耗料量和产蛋率 ;产蛋率与周龄等数量性状间相关性进行观测分析。结果表明 :蛋重大 (86～90 g)受精率高 (97.7% ) ,但孵化率低 (67.4 % ) ;中等蛋重(76～ 85 g)孵化率高 (81.0 % ) ;蛋重与初生重呈强直线正相关 (r=0 .94 0 8)。经观测各组 RF系白番鸭从见蛋到产蛋率达5 %的时间不同 ,但性成熟期后的平均产蛋率无显著差异 (P>0 .0 5 ) ;产蛋期间母鸭群的耗料量与产蛋率呈弱相关 (r=0 .3 811) ;种鸭平均产蛋率在 3 8周龄达最高峰 (83 .3 2 % ) ,以后逐渐下降 ,到 4 5周龄降至 3 2 .6% ,4 6周龄又有回升趋势。更多还原

【Abstract】 The result showed that ferility of egg 86%～90% in weight reached up to 97 7%,while hachability was only 67.4%.The hachabiity of egg weighing 76-85g was 81. 0%.There was positively correlation between the weight of egg and that of initial body(r=0 9408).The time of laying rate reaching up to 5% occurred differently between groups,and there was no significant difference in their average laying rate after sex maturation,but a little correlation between the dietary consumption and laying rate.The laying rate on average was highest in 38 weeks,reaching up to 83.32%,and decreased in 45 weeks,coming down to 32.62%,and then increased a little after 46 weeks.更多还原