大豆是需肥较多的作物,特别是需氮素营养比小麦、玉米多好几倍。但是,由于大豆根瘤菌固氮作用的存在,使施氮变得复杂化,成为大豆高产的限制因素之一。为探索大豆的施肥技术,经试验和调查认为:大豆种肥分层深施不仅能减轻或避免施氮对大豆根瘤的抑制,而且对提高肥料的利用率有重要意义。同时,分层施肥解决了种、肥接触 Soybean is more fertilizer to be required for crops, especially nitrogen nutrition than wheat, corn, several times better. However, due to the nitrogen fixation of soybean rhizobia, the nitrogen application is complicated, which becomes one of the limiting factors for the high yield of soybean. In order to explore the fertilization technology of soybean, the experiment and investigation showed that the deep layering of soybean seed fertilizer can not only reduce or avoid the inhibition of nitrogen application to soybean nodule, but also have great significance to improve the utilization rate of fertilizer. At the same time, stratified fertilization to solve the species, fertilizer exposure