为研究公母雏生产性能差异的原因，选择2周龄AA+公母各75羽AA肉鸡进行饲养试验，观测生产性能指标，用酶联免疫法测定4周龄和6周龄肉鸡血液中生长激素等17项指标。试验结果表明，3～6周龄AA肉鸡公雏的平均日采食量、平均日增重和料重比均极显著高于母雏（P＜0.01）。4周龄肉鸡公雏血液EPI、NE、TSH、GH、IGF-Ⅰ、T4高于母雏，而LP、T3、INS低于母雏，T3、INS达到极显著水平（P＜0.01）。6周龄肉鸡公雏ACTH和NE高于母雏， NE达到极显著水平（P＜0.01），其他指标无明显趋势和差异。%2 weeds old male and female AA broilers with the number of 75 respectively were se-lected in order to investigate the reason of differences in production performance between male and female. Production performance was observed at the age of 4 and 6 weeks old by detecting 17 blood indexes such as growth hormone using ELISA. The results indicated that daily feed intake(AD-FI), daily gain(ADG), and feed/gain ratio of male were extremely significant higher than female(P<0.01).Blood EPI, NE, TSH, GH, IGF-Ⅰand T4 in male were higher than that in female at 4 weeks old, while LP, T3 and INS were lower, among which T3 and INS were significance lower than femal broilers (P<0.01). ACTH and NE in 6 week old male birds were higher than female, and NE was in signifi-cance level. There were significant differences in other indexes.
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