排灌机械工程学报2017，Vol.35Issue(3)：263-270,8.DOI:10.3969/j.issn.1674-8530.16.0120
涌泉根灌交汇人渗对土壤水氮运移特性的影响
Effects of bubbled-root irrigation interference infiltration on transport characteristics of water and nitrogen
摘要
Abstract
To improve the water and fertilizer utilization efficiency of bubbled-root irrigation,experiments are carried out on field fertilizer infiltration to identify wetting front migration,wetting volume,soil water and nitrogen distribution in different distances between emitters (30,40,50 and 60 cm).The results show that the distance between emitters has a great influence on the migration distance of wetting front and wet volume.With increasing distance between emitters,the maximum horizontal wetting distance and wet volume both are large,but the migration distance of wetting front and intersection time all decrease.After the irrigation,the soil moisture and NH4+-N content are the highest under the emitters and higher at the intersection.As redistribution continuing,the wetting front migration and wet volume increase,and NH4+-N content in the volume rises gradually.The redistribution for 1 day,the wetted body basically reaches steady state;for 5 days,the NH4+-N content achieves the maximum.Within 15 days of observation,the NO;-N content is always in a steadily increasing state.The above results will lay a foundation for a better use efficiency of nitrogen and water in bubbled-root irrigation.关键词
涌泉根灌/灌水器间距/湿润体/交汇入渗/水氮运移Key words
bubbled-root irrigation/emitter spacing/wetted body/interference infiltration/water and nitrogen transport分类
农业科技引用本文复制引用
刘显,费良军,刘扬..涌泉根灌交汇人渗对土壤水氮运移特性的影响[J].排灌机械工程学报,2017,35(3):263-270,8.基金项目
国家自然科学基金资助项目(51279157,51479161) （51279157,51479161）
公益性行业(农业)科技专项资助项目(201203003-1) （农业）
