适期播种华北地区播种一般在1月下旬至2月上旬。利用日光温室育苗,苗龄45～55天。选择良种选择早熟丰产的苦穗新1号、长身、夏丰、北京白等品种。浸种催芽①温汤浸种:在盛种子的容器内先倒入一份凉水(常温、种子量的5～10倍),再倒入两份开水(可达到55～60℃),边倒水边用棒状温度计顺着一个方向搅动,并随时加热水,保持55℃10分钟,以后待其自然降为30℃,浸 Sowing crops suitable for planting in North China generally from late January to early February. Use of solar greenhouse nursery, seedling age 45 to 55 days. Choose a good variety Select the earliest and earliest new ear No. 1, long, summer Feng, Beijing white varieties. Soaking seed germination ① Wen Tang Soaking: In the seeds of the container into a cold water (room temperature, the amount of seeds 5 to 10 times), and then into two boiled water (up to 55 ~ 60 ℃) Stick thermometer along one direction of agitation, and at any time to heat the water, to maintain 55 ℃ 10 minutes later to be naturally reduced to 30 ℃, dip