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随着工业化肥供应量的增加,改善水稻品种的矿质营养特性,特别是根据品种的耐肥性进行合理施肥,成为生产上急需解决的问题.在这一方面,六十年代已有不少研究.石塚喜明等通过水培试验认为,只要不是极端高浓度,除氮磷以外,其他元素在过量的浓度下对水稻产量并无影响.同时指出,由于磷在土壤中是容易被固定的,因此氮成为各种元素中对作物生育、产量表现最为敏感的元素.高桥等(1959)试验结果指出,越是耐肥性强的品种生育初期吸氮越多,氮被
With the increase of the supply of industrial fertilizers, improving the mineral nutrition characteristics of rice varieties, especially the rational fertilization according to the varieties’ tolerance to fertilizers has become an urgent problem to be solved in production. In this respect, many studies in the 1960s In the hydroponic test, Ishizuka Masaaki et al. Hold that as long as the soil is not extremely high in concentration, other elements, except nitrogen and phosphorus, have no effect on rice yield at excessive concentrations, and also point out that because phosphorus is easily fixed in the soil, Nitrogen has become the most important element of crop growth and yield, and Takahashi et al. (1959) showed that the more nitrogen-resistant