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1 品种选择选用早青一代品种。2 育苗2 .1 育苗方式采用直播和营养钵育苗。2 .2 播种期冬茬 7月下旬～ 8月中旬 ,春茬 1 2月下旬～ 1月上旬。2 .3 播种指标苗床浇透水 ,含水量 90 % ,土温 2 0℃ ,气温 2 5～ 2 8℃。2 .4 播种量播种量 4.5 kg/hm2 。2 .5 播前准备2
Selection of a variety of early blue generation of varieties. 2 nursery 2.1 breeding methods live and nutrition bowl nursery. 2.2 Seeding winter stubble in late July ~ mid-August, the spring crop in late January ~ early January. 2.3 Seeding indicators Drainage bed water, water content 90%, soil temperature 20 ℃, temperature 25 ~ 28 ℃. 2 .4 seeding rate of seeding 4.5 kg / hm2. 2 .5 Preparation before sowing 2