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国内外公认大豆是需氮较多的作物,但对施用氮素化肥则存在不同论点。目前不少研究报道大豆增施氮素化肥要抑制根瘤生长,不利固氮,对大豆生产无经济价值,甚至招致减产。大豆本身需氮多与施氮抑制根瘤的矛盾,被认为是大豆增产的制约因素,并认为如果解决了施氮技术,大豆单产将出现大的突破。这是近几年国内外研究大豆施
Domestic and international recognition of soybean is more nitrogen crops, but the use of nitrogen fertilizer there are different arguments. At present, many studies reported that adding nitrogenous fertilizer to soybean would inhibit the growth of nodules and unfavorably nitrogen fixation, which had no economic value on soybean production and even led to the reduction of production. Soybean itself requires more nitrogen and nitrogen fertilizer to inhibit the contradiction of nodules, is considered a limiting factor for soybean yield, and that if the solution to nitrogen technology, soybean yield will be a major breakthrough. This is the study of soybeans at home and abroad in recent years