【摘要】 本试验采用了建昌鸭白羽系与天府肉鸭M系（♀）、L系（♀）以及G系（♂）的三个杂交组合，并设四个亲本对照。测定参试各组在舍饲和放牧方式下0－8周龄的体重和饲料消耗，7、8周龄屠宰分析．结果表明：杂交显著地提高了建昌鸭白羽系的早期生长速度和内用性能．三个杂文组合均可供在台词和放牧条件下推广生产中型白羽肉鸭．从在放牧条件下饲养制种鲜考虑，以推广GJ最为可行。本文还就杂种优势与环境问的工作效应进行了讨论．更多还原

【Abstract】 The growth and food utilization of four parental lines and thecrosses between Jianchang white strain and Tianfu M, L strain ducks or G straindrakes were recorded up to 8 weeks of age for carcass analysis. The resultsindicated that the rate of early liveweight growth and meat productivity ofJianchang white ducks could be significantly mproved by crossing with great-typemeat duck. The present study suggested that three cross combinations could bechosen to prtctise both in housing and on pasturing for middle-type meat ducks.Some points about heterosis and environment interaction and sex effect arediscussed too.更多还原