常羽(七彩山地)乌骨鸡三种不同羽色系生产性能的研究

本试验研究了常羽山地乌骨鸡三种不同羽色系的生长发育和产蛋性能，比较了各羽色系绝对生长、累积生长和产蛋曲线．结果表明：常羽山地乌骨鸡具有开发为优质肉鸡的前景；三个羽色系的生长高峰期均在12－14周龄，此期的绝对生长值以H系最高；整个试验期的累积生长值H系最高；产蛋高峰期的曲线以H系最平稳．进行成年体重选择对前期增重有效．建议以H系作为主要的选育品系．

PERFORMANCE OF THE THREE LINES WITH DIFFERENT COLOURS OF THE NORMAL PLUMAGE (UPLAND) BLACK MEAT CHICKENS

The growth, development and egg-laying performence of the threelines with different colours of the normaly plumage or upland black meat clickenswere measured, and their absolute growth, cumulative growth and egg-layiug curveswere compared in this study. The results show that it is prospective for theblack-meat chicken to be selected as a table poultry of good quality. The growthpeaks of all the three lines are between 12 to 14 weeks of age, and in thisperiod the absolute growth value of the line H is the highest. The cumulativegrowth value of the line H in the whole test period is the highest too. The peakof egg-laying curve of the line H is the most smooth and steady one. The authorsbelieve that the line H would be used as the main line for breeding and selec-tion.