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有关大豆营养与施肥问题,《新农业》1983年第2期已有详细介绍,本文不再重复,为取得大豆高产,这里提出一些有关供氮施氮的原则,供大家参考。1.培肥地力。东北各地的大豆高产纪录都出现在有机质含量高的土壤上。双鸭山农场大豆亩产601斤,其土壤有机质含量为11.14%;吉林大豆亩产400斤,土壤有机质含量为3～4%。生产实践表明,大豆对土壤肥力的依赖程度要比粮谷作物大得多,粮谷作物可以多施一些化学氮肥满足一定的需氮量,而化学氮肥往往对大豆根瘤菌固氮活性有不良影响。土壤有机质含量高,则肥力性状良好,借肥强度弱而长,适合大豆根系吸氮且又不影响根瘤的固氮活性。
Regarding soybean nutrition and fertilization, “New Agriculture” No. 2, 1983 has been described in detail, this article will not be repeated, in order to obtain high yield of soybean, put forward some principles for nitrogen supply for your reference for your reference. Fertility fertility. High yield records of soybeans across the Northeast have been found in soils with high organic matter content. Shuangyashan farm soybean yield 601 kg, the soil organic matter content of 11.14%; Jilin soybean yield 400 pounds, the soil organic matter content of 3 to 4%. Production practice shows that the dependence of soybean on soil fertility is much larger than that of grain crops. Some chemical nitrogen fertilizers can be applied to grain crops to meet certain nitrogen requirement, while chemical nitrogen fertilizers often have an adverse effect on the nitrogen fixation activity of soybean rhizobia. The content of soil organic matter is high, the fertility traits are good, and the strength of the fertilizer is weak and long, which is suitable for the nitrogen absorption of soybean roots without affecting the nitrogen fixation activity of nodules.