一、播前准备玉米杂交制种地应选择山间平原、土壤肥沃、水浇条件良好、５００米内没有种杂交玉米的地块，且连成片。播种前要进行晒种、包衣，按其千粒重、发芽率、密度要求确定亩播量。一般每亩用母本２．５～３千克，父本０．７５～１千克。并要备足肥料及农药、农机具... First, before sowing Corn hybrid seed selection should be selected mountain plain, fertile soil, watering conditions are good, there is no species of hybrid corn within 500 meters plots, and even into a film. Sowing seeds before planting, coating, according to their 1000-grain weight, germination rate, density requirements to determine the amount of acres of sowing. The general use of maternal 2.5 to 3 kg per mu, paternal 0.75 to 1 kg. And to prepare enough fertilizer and pesticides, agricultural machinery ...