水利学报2017，Vol.48Issue(12)：1410-1418,9.DOI:10.13243/j.cnki.slxb.20170602
农田排水沟渠底泥-间隙水-上覆水氮磷迁移转化规律研究
Study on the migration and transformation of nitrogen and phosphorus in sediment-interstitial water-overlying water in farmland drainage ditch
摘要
Abstract
Study on the migration and transformation of nitrogen and phosphorus among the sediment-interstitial water-overlying water can contribute to grasp the interception mechanism of nitrogen and phosphorus in farmland drainage ditch.In this paper,the migration and transformation of nitrogen and phosphorus through the three were studied and the sediment morphology was tested by scanning electron microscope (SEM).The results show that:the nitrogen and phosphorus are adsorbed and stored in the sediment in the early stage of rice growth,and the nitrogen and phosphorus are released in the later ice growth;during the entire rice growth,the concentration of nitrogen and phosphorus in the interstitial water are about 3.1 and 6.5 times the overlying water,which the NH4+-N as the main nitrogen form of storage;in the process of rainfall,the ditch sediment as the source of nitrogen and phosphorus which provide the nitrogen and phosphorus in the interstitial water gradually migrate to the overlying water,NH4+-N gradually change to NO3--N,and the granular TN and TP had a great influence on the loss of TN and TP in the overlying water;and the surface of sediment particles is rough and has a pore structure,that is conducive to the adsorption of nitrogen and phosphorus.关键词
农田排水沟渠/底泥/间隙水/上覆水/SEM/氮磷Key words
ditch/sediment/interstitial water/overlying water/SEM/nitrogen and phosphorus分类
建筑与水利引用本文复制引用
王晓玲,郑晓通,李松敏,张福超..农田排水沟渠底泥-间隙水-上覆水氮磷迁移转化规律研究[J].水利学报,2017,48(12):1410-1418,9.基金项目
国家自然科学基金创新研究群体科学基金(51621092) （51621092）
天津市应用基础与前沿技术研究计划(16JCYBJC23100) （16JCYBJC23100）
