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四单19的亲本属于喜肥水高产自交系,母本对瘠薄地、沙岗地、连作玉米缺锌土壤反应特别敏感,表现“白化苗”。搞好四单19制种,提高制种产量,降低种子成本,其措施如下: 1.选地整地四单19亲本是喜肥水高产自交系,必须选择土质肥沃、地势平坦、地力均匀、保水性好、抗旱保收的地块种植。制种田必须上年秋季做好准备,要秋翻、秋打垅,压实压好,达到播种状态。勿选瘠薄岗地、新开沙壤地及连年连作玉米的地块,这样地块易缺锌造成“白化苗”。
Sidan 19 was a hi-yielding self-fertile inbred line. The female parent was especially sensitive to barren land, sandy land and continuous cropping of zinc-deficient soil, showing “albino seedling ”. Improve the production of seed and reduce the cost of seeds, the measures are as follows: 1. The selection of land preparation Four single 19 parents are hi-yielding inbred lines, you must choose fertile soil, flat terrain, uniform soil and water Good sex, drought-resistant plots planted. Farming system must be prepared in autumn last fall, to autumn turning, autumn hitting, compaction pressure, to sow status. Do not choose infertile barren, open sandy soils and continuous plots for corn, so easy to zinc deficiency caused by land “albino seedling ”.