汉中地区水稻田氮元素污染调查研究

Investigation of Pollution of Nitrogen Element in Hanzhong Rice Paddies

通过调查汉中地区水稻田的氮肥施用技术，包括氮肥品种与施用数量等，并结合水稻田实地采样和测定土壤与水体中氮元素含量，主要采取0～5cm，5～10cm，10～15cm三个深度的土壤，测定其中可溶性氮的含量，分析结果找出水稻田氮元素含量变化原因。最后提出减少水稻田氮元素污染的治理措施。

Firstly, the study designed to survey the varieties and quantity of nitrogen fertilization in paddy field in hanzhong city. Secondly, got soil samples in 5 cm, 10 cm, 15 cm three depth of soil and water samples, and then measured the nitrogen levels. Finally, analyzed the results and find the reasons of nitrogen element content change on rice paddies, and gave the suggestions of decreasing the pollution of nitrogen element on rice paddies.