论文部分内容阅读
大豆种籽发芽出苗迅速健壮,需要于播种后两三天内,吸收相当种籽重量50—60％的水分,所以对大豆田应当秋翻细整地,保墒良好,适期趁墒早播,插在湿土层中,并通过镇压,使种籽与土壤密合,并减少土壤水分散失。如果干土播种等雨,易使豆粒霉变,失去生机。雨后放晴播种会有良好效果。大豆种籽发芽出苗齐壮,还要求地温达到15—16℃。所以一方面不宜播种太早,也不要插的太深,一般黑土播深5厘米左右。沙性地略深些,土壤水分大时则不宜过深,否则种籽因低温及透气不良而出苗慢、弱,甚至烂
Soybean seed germination rapid and robust, need to sow two or three days after the seeding, the equivalent of 50-60% of the weight of the seeds of water absorption, so the soybean should be subtle autumn soil preparation, moisture is good, while premature seeding soil moisture, inserted in the wet Soil layer, and through the suppression, the seeds and soil close together, and reduce soil moisture loss. If dry soil sowing and other rain, easy to make beans moldy, lost vitality. Sunny after sowing will have good results. Soybean seed germination emergence strong, but also requires ground temperature reached 15-16 ℃. So on the one hand it is inappropriate to sow too early, do not plug too deep, generally about 5 cm black sowing depth. Slightly deeper sand, soil moisture should not be too deep, otherwise the seeds due to low temperature and poor ventilation and emergence of slow, weak, or even rotten