水土保持学报2018，Vol.32Issue(1)：39-45,7.DOI:10.13870/j.cnki.stbcxb.2018.01.007
辽河上游河岸植被过滤带对地下渗流中氮磷截留效果的影响
Ground Water Nitrogen and Phosphorus Retention by Established Riparian Vegetated Filter Strips in the Upstream of Liaohe River
摘要
Abstract
Riparian vegetated filter strips (RVFS) are an efficient approach to reduce agricultural non-point source pollution transported in runoff before the water flows into watercourses.A field scale study was conducted in the upper reaches of Liaohe river for two years to determine the effect of vegetation types and the width on nitrogen and phosphorus retention in subsurface seepage.The experimental site consisted of three plots adjacent to agricultural edge (weeds-T1,sweet clover (Melilotus suaveolens L.)-T2 and sweet clover (Melilotus suaveolens L.)/China wingnut (Pterocarya stenoptera C.DC.)-T3).T2 and T3 were new established filter strips that were compared with weeds (T1).The results showed that all the RVFS did not significantly reduce the concentration of ground water nitrogen and phosphorus except for NH4+-N,The average interception efficiency was 18.03％～62.20％.The 13 m T3 had the best retention effect for NH4+-N which was 77.45％ T3 had the highest retention efficiency of TP and DP for 62.15％ and 80.01％ at the 13 m width.The overall T3 on the various forms of nitrogen and phosphorus retention effect is best,followed by melilotic belt.The plant vegetation filter on nitrogen and phosphorus accumulation capacity was Pterocarya stenoptera ＞Melilotus＞weeds.Taking a harvest for sweet clover,the mount of nitrogen removed by the above-ground part varied in the range of 15.21～26.78 g/m2,and the phosphorus was in the range of 0.72～1.27 g/m2.关键词
河岸植被过滤带/氮/磷/地下渗流/截留阻控Key words
riparian vegetated filter strips/nitrogen/phosphorus/ground water/retention分类
资源环境引用本文复制引用
汤家喜,何苗苗,周博文,应博,李仁杰,李杨,吕刚..辽河上游河岸植被过滤带对地下渗流中氮磷截留效果的影响[J].水土保持学报,2018,32(1):39-45,7.基金项目
国家自然科学基金项目(41501548) （41501548）
辽宁省教育厅科学研究一般项目(LJYL021) （LJYL021）
