环境因素对不同品种鸡产蛋率的影响及其互作效应

ENVIRONMENTAL EFFECTS ON THE LAYING RATE OF DIFFERENT LAYER BREEDS AND GENOTYPE-ENVIONMENT INTERACTION

本试验采用三个品种、两种光照制度和两种饲养制度,测定不同处理对产蛋率的影响及其三因子互作效应。产蛋期采用两种舍饲温度,测定不同舍温对互作效应的影响。结果表明,不同处理对产蛋率有显著影响,罗曼白鸡的产蛋率显著高于西赛克斯和伊莎褐鸡,鸡只生长期恒定光照的产蛋率显著高于逐渐减光的产蛋率,而生长期适度限制饲养与自由采食和产蛋期15℃与22℃舍温的产蛋率没有显著差异。全群鸡三因子互作效应表现在品种X光照、品种X光照X饲养具有显著性,但在不同舍温下互作效应有一定差异。

Three Layer breeds, two Light regimes and two Feeding regimes were used to measure the influnces on the laying rate of the various treatments and the interaction among three factors. Two house-temperatures in laying period were provideded to survey the influnce on the interaction. The results show that there are significant differences in different treatments. Among three layer breeds, Lohman white has a higher laying rate than Hesix and Isa Brown. The laying rate of hens under constant light (9 hours per day) during their growing period is higher than that of hens under variable light (from 16 hours to 7 hours). There is no significant difference in the laying rate between the restricted feeding and ad libitum in growing period and between the house-tempereture 15℃ and 22℃ in the laying period. The interaction of Breeding * Light and Breeding * Light * Feeding in all layers are significant, but the interaction of three factors are different under two house-temperatures.