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1 整地前茬大豆收获后,用重耙对角耙两遍,深度15～18cm,再用轻耙耙一遍,承耙随耢,达到地表平,种床平,土壤细碎,直径5cm的土块1m~2不超过5个,达到播种状态。 2 种子精选及播种播种前用重力精选机选1～2次,清除小粒,不完全粒及杂质,使净度达到99%,发芽率95%以上,纯度98%以上,含水量13.5%;在土壤化冻5cm时播种,播深4～5cm,镇压后3～4cm,播种直,下种匀,单口流量误差不超过1%,一般保苗650万株/hm~2左右。
1 before harvest stubble soybeans after harvesting, with heavy rake diagonal rake twice, the depth of 15 ~ 18cm, rake again with a light harrow, Cheng rake with raccoon, reaching the surface level, seedbed flat, soil crushing, diameter 5cm of clods 1m ~ 2 no more than 5, to sow status. 2 seed selection and sowing Prior to sowing by gravity selection machine 1 or 2 times to remove small particles, incomplete particles and impurities, so that the clarity of 99%, the germination rate of 95% or more, more than 98% purity, water content of 13.5% Sowing 4 cm to 5 cm sowing depth and 3 to 4 cm after repression, sowing straight and under the same species, the flow error of a single port does not exceed 1%, generally 6.5 million seedling / hm 2 or so.