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本文探讨了各种N源在水稻植株各器官上的分布情况,指出这是由于不同土壤和肥料之间供N特性的不同,土壤氮和肥料氮在不同时期以不同强度和速度交错进入植株“库”重新分配的结局。以稻谷N%dff(或dfs)值对稻草N%dff(或dfs)值的比率表示各种N“源”对稻谷N的贡献大小,结合肥料N在农田土壤生态系统中的平衡帐,评价施肥技术具有实际意义。施肥提高了植株对土壤氮的吸收量,改变原来的土壤供氮特性起了均衡增产的作用;然而“激发效应”也可能增加土壤氮的气态损失。
This paper explored the distribution of various N sources in various organs of rice plants, pointing out that this is due to the difference in N-supplying characteristics between different soils and fertilizers. Soil N and N fertilized at different times and with different intensities and velocities entered plants “ Library ”redistribution of the outcome. The ratio of N% dff (or dfs) value of rice to N% dff (or dfs) value of rice straw was used to indicate the contributions of various N sources to rice N. Based on the balance of fertilizer N in the farmland soil ecosystem, Fertilization technology has practical significance. Fertilization increased plant uptake of soil nitrogen, and changed the original soil nitrogen supply to play a role of balanced production. However, the “stimulating effect” may also increase the loss of soil nitrogen.