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要获得水稻高产,必须施足与巧施肥料。日本战后水稻单产增长较快,原因不少,其中化肥供应量显著增多,施肥方法的重大改革,起了十分重要的作用。如松岛省三等人的“V”字施肥法,田中的深层施肥法,片仓权次郎的片仓式施肥法,是日本水稻施肥技术的三种代表类型。宁夏所处纬度较高,水稻生长季节较短,生产水平差别较大,化肥的施用更值得研究。本试验仅就氮素化肥的施用进行探讨,以期逐步弄清宁夏水稻追施氮肥的特点。
To get high yield rice, fertilizer and fertilizer must be applied. Japan’s post-war rice yield increased rapidly for many reasons, including a significant increase in the supply of chemical fertilizers and a major reform of the fertilization method, which played a very important role. Such as Songdo third-person’s “V” fertilization method, Tanaka’s deep fertilization method, Kakura Kujiro Langchuang film fertilization method is Japan’s three types of rice fertilization technology representative. Ningxia is located at a higher latitude, the season of rice growth is shorter and the production level is quite different. The application of chemical fertilizers is more worthy of study. This experiment only discusses the application of nitrogen fertilizer, with a view to gradually clarify the characteristics of topdressing nitrogen fertilizer in Ningxia.