生态环境学报Issue(5)：845-852,8.DOI:10.16258/j.cnki.1674-5906.2015.05.019
典型自然降雨条件下太湖地区水稻田氮磷输出特点
The Output Characters of Nitrogen and Phosphorus from Typical Natural Rainfall Runoff of Paddy Fields in Tai Lake Region
摘要
Abstract
To study the output characters of nitrogen and phosphorus in paddy field’s runoff during rainfall, systematic monitoring of runoff pollutants was conducted in the entire process of two typical rainfall-runoffs in Hejiabang Creek Basin of Tai Lake Region. The changes of pollutant concentration and M (V) curve of pollutant in the mixed effluent from paddy fields and effluent from independent paddy field were drawn, and the EMC of runoff as well as the output percentage of PN/TN (particulate nitrogen/total nitrogen), PP/TP (particulate phosphorus/total phosphorus) in the runoff were calculated. The results showed that during moderate rain during moderate rain the heavy rainfall leads to sharp increase of SS (suspended solids), PN (Particulate nitrogen), PP (Particulate phosphorus) concentration. The maximum variation amplitudes of SS, PN and PP are 628.77, 4.43 and 0.46 mg·L-1, respectively. However there has no obvious impact on AN (ammonia nitrogen), NN (nitrate nitrogen), PO (phosphate). In early rainfall, the output of nitrogen and phosphorus are mainly in the form of particle. The soil in particulate state has stronger enrichment effect on phosphorus than on nitrogen. During the early 35%output of runoff, pollutants in particulate state (PN, PP) take up 60%of the total pollutant (TN, TP) output; the EMC proportion of PN/TN, PP/TP output fluctuates between 40% and 60%. When nitrogenous fertilizer comes to low level and stable phase, the peak output of phosphorus also becomes stable. The first flush effect of particulate pollutants (SS, PN and PP) in the effluent form independent paddy field is stronger than that from mixed paddy field. The EMC output character of the pollutants is as follows:SS>TN>PN>AN>NN>TP>PP>PO.关键词
太湖流域/水稻田/自然降雨/氮磷输出/污染物迁移规律Key words
Tai Lake region/paddy field/natural rainfall/output of nitrogen and phosphorus/migration law of pollutants分类
资源环境引用本文复制引用
高超,李阳,于海明,涂佳敏,孙井梅..典型自然降雨条件下太湖地区水稻田氮磷输出特点[J].生态环境学报,2015,(5):845-852,8.基金项目
国家水体污染控制与治理科技重大专项 （）
