【摘要】 本文比较研究了公母分饲对不同长速类型黄羽肉鸡生长性能和饲料利用的影响,旨在为黄羽肉鸡饲养方式优化提供参考依据。将840羽1 d岭南黄鸡(快速型)、840羽1 d绿园草鸡(中速型)、1440羽1 d梅岭土鸡(慢速型)黄羽肉鸡分别按饲养试验要求分为公母混养组(公母各半)、全公组和全母组,每组4个重复。各长速类型肉鸡各组饲喂同一的相应长速黄鸡饲粮,饲养试验依次分别为期50、75 d和90 d。结果表明:同比混养组,公母分饲使3个类型黄羽肉鸡全公、全母2个处理组出栏体重的综合均值皆无显著差异,但显著降低了中速型黄羽肉鸡生长后期(46~75 d)和全期(1~75 d)的耗料量8.41%和5.84%(P<0.05),相应地提高了饲料转化效率8.96%和5.52%(P<0.05),显著降低了慢速型黄羽肉鸡全期死亡率绝对差值4.81%(P<0.05),在一定程度上改善了快速型黄羽肉鸡全期尤其是后期的增重及饲料增重比。因此,中速型黄羽肉鸡生长后期须采取公母分饲技术;慢速型黄羽肉鸡全期应考虑采取公母分饲技术;快速型黄羽肉鸡后期可考虑适时公母分饲技术,以获得良好的生产效率。更多还原

【Abstract】 A feeding trial was conducted to study effects of Sepa rated-sex rearing on growth performance and feed utilization among different growth rate of Yellow-Feature broiler, aiming at providing scientific data for broilers ’ production. Eight hundred and forty one-day-old Lingnan(Fast-growth Line) and Lvyuan(Middle-growth Line), One thousand four hundred and forty one-day-old Meiling(Slow-growth Line)Yellow-Feathered broiler chicks were randomly assigned to 3 groups with 4 replicate pens. There were Mixed-sex rearing group(Control), Male group and Female group, feeding the same diet. The experiments lasted for 50 days, 75 days and 90 days respectively. The results showed that: compared to the mixed-sex rearing group, there was no significant difference in comprehensive final body weight of all different growth rate of Yellow-Feathered broiler reared in the separated-sex program. However, broiler rearing in Separated-sex program had a significantly decreasing feed intake at rate of 8.41% and 5.84%( P<0.05), plus improving feed efficiency at the percentage of 8.96% and 5.52%(P<0.05), during the phase of day 46 to 75 and day 1 to 75 of age of middle-speed growth variety. Overall mortality rate decreased significantly by 4. 81% in slow-speed growth variety of separated-sex rearing program(P<0.05). And also improve average daily gain and feed: gain ratio of slow-speed growth variety reared separated-sex among the overall stage or last growth phase. Those indicated that in order to achieve desirable growth performance, separated-sex rearing program could be taken into effect timely from day 21 of fast- speed growth variety and day 45 of middle-speed growth variety broiler, same to the overall growth phase of slow-speed growth variety.更多还原