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壮苗是“双低”油菜高产的基础。壮苗的标准:叶厚色绿,老嫩适度,无病虫害,根茎粗短。要育好壮苗应抓好以下几点。1.留足苗床。苗床应选择土壤疏松肥沃,靠近水源,排灌方便的田块,但十字花科蔬菜地不宜作苗床。苗床面积与大田面积比为1:6至1:7,若播种密度过大,出苗后会出现苗挤苗现象,造成弱小苗、高脚苗、曲颈苗多。
Strong seedling is “double low ” rapeseed yield basis. Strong seedling standards: thick green leaves, old tender moderate, no pests, short stubble. To breed strong seedlings should do a good job the following points. Leave enough seedbed Seedbed should choose loose and fertile soil, close to the water, irrigation and drainage convenient plots, but cruciferous vegetables should not be used as seedbed. Seedbed area and field area ratio of 1: 6 to 1: 7, if the planting density is too large, there will be sprinkled seedlings crowded phenomenon after emergence, resulting in weak seedlings, tall seedlings, curved neck seedlings and more.