氮肥施用对冬小麦土壤残留NO_3^--N含量及根系分布影响

The Effect of N Fertilizer Applied on the Content of Soil NO_3^--N Remained and the Space Distribution of Winter Wheat Roots

通过6个氮水平试验,研究了不同氮肥用量对冬小麦土壤剖面NO3--N含量及其与根系空间分布对应关系的影响;探索了土壤剖面NO3--N含量与氮肥施用量的趋势规律,以及冬小麦施用氮肥对地下水造成污染的成因、规律及最危险时期.

Based on the field experiments of six levels of nitrogen fertilizer in winter wheat, the effects of N fertilizer on the content of soil NO3--N remained and the corresponding relationship between it and the space distribution of winter wheat roots were studied, at the same time, the trend law of the content of soil NO3--N and amount of nitrogen fertilizer was explored. besides, the cause of formation and the most dangerous stage of nitrogen fertilizer resulting in polluting ground- water were also studied in this paper.