克伦特罗和苯二氮卓化合物F89对肉鸡生长、胴体组成和血液代谢物的影响

Effects of clenbuterol and benzodiazepines F89 on growth, carcass characteristics and some blood metabolites in broilers

将β－受体激动剂克伦特罗（１ｍｇ／ｋｇ）和苯二氮卓化合物Ｆ８９（２ｍｇ／ｋｇ）同时添加在４１～５６，３８～５９和５～５６日龄红布罗肉鸡的日粮中，连续饲喂。饲养试验表明：试验组肉鸡的摄食量分别提高了４．４７％，３．３４％和５．３４％；增重分别提高了１３．６％（Ｐ＜０．０１），８．７２％（Ｐ＜０．０５）和９．９６％（Ｐ＜０．０５）。屠宰试验表明：试验组肉鸡的胸肌率和腿肌率都有明显提高，从而改善了肉鸡胴体组成，提高了瘦肉率。肉鸡的胸肌增加伴随着ＲＮＡ含量增多，而总ＤＮＡ含量保持不变，因此，试验组肉鸡的胸肌ＲＮＡ／ＤＮＡ值上升。添喂Ｆ８９和ＣＬ后，肉鸡血清尿酸和雌激素（１７β－Ｅ２）含量显著降低，而游离脂肪酸和胰岛素含量显著上升。

broilers aged 41 56 d,38 59 d and 5 56 d were given respectively diets supplemented with 1 mg/kg clenbuterol(CL)and 2 mg/kg F89(one of the benzodiazepines)and were investigated the effect of dietary CL and F89 on growth,carcass composition and some metabolites Feed intake was increased by 4 47%,3 34% and 5 34%,average daily body weight gain was increased by 13 6% ( P<0 05 ), 8 72% (P<0 05 ) and 9 96%( P<0 05 ) respectively Moreover the concentration of serum free fatty acid and insulin increased;blood glucose,β lipoprotein and 17 β estradiol decreased;RNA∶DAN ratio in the breast muscle increased;while the content of glycogen in the breast muscle decreased The results showed that CL and F89 not only stimulated feed intake but also influenced metabolism in broilers