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1 选好地块制种地宜选择土壤较肥沃,地势平坦,肥力均匀,排灌方便,旱涝保收.不易被人畜危害的田块。同时要选择1～2a未种过油菜或十字花科蔬菜的田块,以减少病虫危害。2 精细整地,饱施底肥母本种子发芽势弱,顶土力差。为保证一播全苗,种子田要精细整地,耕作做到深、细、碎、平、净,土壤上虚下实。同时结合整地施足底肥。一般667m~2施有机肥3 000kg 的基础上,再施碳铵
1 Well-chosen plots of land should choose more fertile soil, flat, fertile, irrigation and drainage convenience, drought and flood protection is not easy to be harms plots. At the same time to choose 1 ~ 2a have not been planted rape or cruciferous vegetables plots to reduce pest damage. 2 fine preparation, the end of full-fat mother seed germination weak, top soil is poor. In order to ensure a full seedlings, seed fields to finely ground, deep plowing, fine, broken, flat, net, soil virtual reality. At the same time with the soil preparation facilities foot fertilizer. General 667m ~ 2 organic fertilizer 3 000kg based on the application of ammonium bicarbonate