【摘要】 本文通过秸秆还田对大豆生产效应的机理作了研究和分析,证明秸秆还田有利于大豆生产,可为豆田增加大量有机质,改善土壤理化性质和生物学性质,为大豆提供养分和二氧化碳,因而秸秆还田是改善大豆生育条件、促进大豆生育和增加大豆产量的一项有效栽培措施。更多还原

【Abstract】 The trials carried out in our Academy and other institutes in Hei-longjiang Province showed that turning crop residues down to the soil would improve the environmental conditions for the growth of soybean, provide definite amounts of organic matter and nutrients to soybean, and improve the physical, chemical and biological properties of the soil in soybean field. Therefore, turning crop residues down to the soil is one of effective cultural practices for promoting the growth of soybean and consequently increasing soybean yield. These trials also showed that turning crop residues down to the soil is specially beneficial to soybean production. It is necessary to point out that wheat straws and corn stalks must be cut into pieces, be thrown to the surface of the soil and plowed down to the cultivated layer of soil evenly. It is also necessary to apply a small amount of NP fertilizers during planting, or apply topdressing of N at flowering in order to avoid nitrogen deficiency at early seedling stages of soybean.更多还原