南京林业大学学报（自然科学版）2019，Vol.43Issue(1)：98-104,7.DOI:10.3969/j.issn.1000-2006.201806022
洪泽湖地区麦稻两熟农田和杨树林地氮磷径流流失特征研究
Characteristics of nitrogen and phosphorus runoff of wheat-rice double cropping field and poplar forest land in intersection area of Hung-tse Lake
摘要
Abstract
[Objective]The loss of nitrogen and phosphorus has become one of the most important sources of agricultural non-point source pollution.The purpose of this study was to explore and compare the characteristics of rainfall runoff and the regularities of nitrogen and phosphorus loss in runoff water of a wheat-rice double cropping field and poplar forest land.[Method]In this study, the surface runoff and nitrogen and phosphorus loss were monitored in the intersection area of Hung-tse Lake and Huaihe River for one year by collecting runoff.[Result]The minimum rainfall that produced runoff from the wheat field, rice field, and poplar forest land was 4.2, 3.3 and 22.8 mm, respectively.With the increase of rainfall, the increase of the poplar forest runoff was much lower than that of the farmland.The total nitrogen, nitrate nitrogen, total phosphorus, and soluble phosphorus loss were not significantly correlated with rainfall, but the loss of different states of nitrogen and phosphorus increased with the increase in rainfall.The wheat field and poplar forest land were usually in the dry condition, where nitrogen loss was mainly caused by nitrate nitrogen and phosphorus loss was primarily caused by particulate phosphorus.The rice field was in a flooded condition, and the loss of nitrogen and phosphorus was caused by ammonia nitrogen and soluble phosphorus, respectively.The nitrogen and phosphorus loss in the poplar forest was lower than that of the farmland, and the total loss in a year of total nitrogen, soluble nitrogen, nitrate nitrogen, and ammonia nitrogen in the polar forest land was 22.61％, 23.79％, 23.46％and 24.59％that of the farmland, respectively.Total phosphorus, soluble phosphorus, and orthophosphate in the polar forest land was 0.81％, 0.77％and0.67％that of the loss in farmland, respectively.[Conclusion]Therefore, forest land can better control the loss of runoff nutrients compared with farmland, and plays an important role in the control of non-point source pollution.关键词
农田径流/氮磷流失/面源污染/水土保持Key words
surface runoff in cropland/loss of nitrogen and phosphorus/non-point source pollution/conservation of water and soil分类
农业科技引用本文复制引用
李吉平,徐勇峰,陈子鹏,韩建刚,李威,李萍萍..洪泽湖地区麦稻两熟农田和杨树林地氮磷径流流失特征研究[J].南京林业大学学报（自然科学版）,2019,43(1):98-104,7.基金项目
国家林业科学技术推广项目(201637) （201637）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
