氯丙嗪对肉用仔鸡热应激的影响

The Effect of Chlorpromazium on the Broilers during Heat Stress

１６０只１周龄健康肉用雏鸡随机分成２组，经１周预试后进行试验。对照组和试验组鸡的日粮处理分别为：基础日粮、基础日粮＋０１％氯丙嗪。试验期５周。研究在日粮中添加氯丙嗪对慢性热应激肉用仔鸡生产性能及某些生理生化指标的影响。结果表明：试验组鸡的料肉比比对照组鸡低，增重是对照组鸡的１１７３８％，且试验组鸡的胸肌／体重、腿肌／体重的比值高于对照组鸡，试验组鸡的甲状腺重量高于对照组鸡，Ｔ３／Ｔ４的比值极显著高于对照组鸡，试验组鸡的肾上腺重量小于对照组鸡，血清中皮质醇（Ｃｏｒ）的含量较对照组鸡低。

broiler chicks at one-week old were selected and randomly divided into two groups After one week acclimated,control group(CG)and experimental group(EG)were fed on basal diet and basal diet+0 1%chlorpromazium respectively The experiment was conducted for 5 weeks to examine the effects of chlorpromazium on performance and some physiological and biochemical parameters of broilers during chronic heat stress As compared with CG,EG decreased feed coversion rations,increased body weight gain 17 38% The percentages of leg,breast muscle yields were improved in EG The weight of thyroid was higher in EG,the weight of adrenal was lower in EG EG significently increased the ratio of triiodothyronine/thyroxine in plasma,but significently decreased the plasma cortisone level