^(15)N示踪技术在植物N素营养研究中的应用及进展

Advance and Application of ^(15)N Tracer Method on Research of Plant Nitrogen Nutrition

近年来,由于氮肥利用效率的不断下降,植物氮素的营养学研究更是日益受到重视。氮肥利用率受施氮水平、施用方法、土壤性状、气象条件、品种类型等多种因素的影响,平均利用率只有30%-35%。减少氨的挥发和反硝化作用,选育氮高效、耐低氮品种是提高氮素利用率、减少环境污染与资源浪费和实现农业可持续发展的主要途径。本文简要概述15N标记技术尤其是示踪技术在植物氮素的吸收、利用及分配等方面的应用及近年来的研究进展。

The investigation of plant nitrogen nutrition was highly attched by much more pursuer recently in order to improve the lower-utilize-rate of nitrogen. Nitrogen fertilizer utilization ratio is affected by various factors such as N level , applied method , soil properties , meteorological phenomena, and breed types , its average utilization ratio only have 30%-35%. Reducing ammonic volatilization and nitrification , using high N use efficiency and low N responsiveness simultaneously are the main apt proaches of sustainable development in agriculture to improve utilization ratio of nitogen , decrease environmental pollution and waste of resources. This paper summarised the advance of 15^ N on the absorb, utilization and distribution of plant nitrogen. The application of 15^N tracer method on plant nitrogen nutrition research would be summarized in this paper.