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两年来,从总结陈永康高产水稻施肥技术经验出发,针对水稻器官生长与土壤氮素的供求特点进行了一些工作,其目的在于探求高产水稻因土制宜的施肥原则及其科学依据。一般说来,水稻的生长中期(拔节—穗分化)是奠定壮稈大穗丰产的重要时期。在这一时期植株上有许多同时生长的器官。从已往的研究结果看来,晚稻植株的不同器官对氮素供应状况的反映不同,而同一器官在不同生育时期内影响也不一样。同时,不同土壤对氮素供应容量、强度、持续时间的贡献大小也有所不同。如何结合土壤的供肥性能和晚
In the past two years, based on the conclusion of Chen Yongkang’s high-yielding rice fertilization experience, some work has been done on the characteristics of rice organ growth and supply and demand of soil nitrogen. Its purpose is to explore the principle of fertilization based on soil fertility and its scientific basis. In general, the mid-growth stage of rice (jointing-spike differentiation) is an important period for the production of strong stalks with large spikes. There are many plants that grow simultaneously in the plant during this period. Judging from the results of previous studies, different organs of late rice plants respond differently to nitrogen supply, while the same organs have different effects at different growth stages. At the same time, the contributions of different soils to nitrogen supply capacity, intensity and duration are also different. How to combine soil for fertilizer performance and lateness