【摘要】 应用抗热应激添加剂在高温（30℃以上）条件下对720羽280日龄热应激的伊莎产蛋鸡群进行分组防制试验，结果表明：抗热应激添加剂Ⅱ和Ⅲ号能极显著性（P＜0．01）地提高平均产蛋率和平均每枚蛋重，显著性（P＜0．05）降低蛋料比和死淘率，极显著性（P＜0．01）提高平均每日每羽利润，是高效实用的添加剂。更多还原

【Abstract】 Seven hundred and twenty laying hens (280 day old) were divided into four groups randomly and treated with the stress moderator 0, Ⅰ, Ⅱ, Ⅲ and respectively from 40 weed - 0ld to 46 weed - 0ld in high environmental temperature (0ver 30degree centigrade). Results show that stress moderator Ⅱ and Ⅲ, as compared with control group(stress moderator 0 ). have significantly increased (p <0. 01 ) the mean rate 0f egg production,the mean egg weight and the mean profits, and significantly decreased(P <0. 05 ) the rate of egg weight to diet weight and the death rate.更多还原