【摘要】 作者于1983年在武威和庆阳地区选择了三个不同类型和饲养水平不同的鸡场和养鸡专业户的鸡群,进行了“蛋鸡饲养标准方案”(能量、蛋白质)推广效应的观察试验.目的在于进一步检验该方案的实际应用价值。经500天的试验结果证明:在开放或群养条件下,母鸡开产体重的整齐度达75％;开产日龄为162天;入舍母鸡产蛋量234枚,料蛋比为2.67;母鸡饲养日产蛋量242枚;料蛋比为2.59—2.53.用该方案饲养标准饲喂的母鸡,每产0.5公斤蛋比对照组少耗料16.3％。试验组开放式母鸡的产蛋性能达到了国内密闭式笼养鸡的先进水平.为此,该方案可以推广应用.更多还原

【Abstract】 The feeding standard for energy and protein for laying birds presented by Gansu Agricultural University was valuated with three chicken lines in different feeding levels from some chicken farms and special families in Wuwei and Qinyang areas, Gansu province, in 1983. The experiment lasted over 500 days and it was shownthat, under open mass feeding conditions the consistency of body weights of hens at first laying reached 75%. The age at first laying was 162 days. The hen-housed egg production was 234, the feed to egg ratio was 2.67. The hen-day egg production was 242, the feed to egg ratio was 2.59-2.53. The feed consumption per one Jin of eggs in hens fed under this standard reduced 16.3% as compared with that in those control ones. The laying performance of hens fed openly under this standard came to the advanced level of those fed closely in cages in this country. The results obtained showed that this standard could be used extensively.更多还原