氮肥损失研究进展

Research Progress on Losses of Fertilizer Nitrogen

在查阅了大量大田实验和15N追踪实验文献资料的基础上,对肥料氮损失量及主要损失途径进行了总结。结果表明,土壤中氮肥去向问题非常复杂,氮素损失量与施氮量和土壤水分有关。冬小麦生长期间发生淋失的可能性很小,主要是反硝化损失。

Today because of low nitrogen utilization efficiency (NUE), high nitrogen-fertilizer application rates are often inevitable, leading to more and more losses of N-fertilizer. This article summarizes the data from a lot of field experiments and 15N trace experiments, and assessed loss amounts of N-fertilizer and main loss way. The fate of N-fertilizer applied to soil is very complicated. Loss amounts are generally related to N rates and water moisture. In winter wheat growing season, the possibility of leaching beyond root zone is very small, while the losses by denitrification are substantive.