排灌机械工程学报2017，Vol.35Issue(1)：71-79,9.DOI:10.3969/j.issn.1674-8530.16.0099
土壤质地和供水压力对竖插式微润管入渗的影响
Effects of soil texture and water pressure on moistube infiltration in vertical inserting mode
摘要
Abstract
In order to investigate the interactive effect of soil type and water head on the infiltration characteristics of vertically inserted moistube,three soil textures (sand,sandy loam and red loam)and three water heads (1 .0,1 .5 and 2.0 m)were used,and infiltration rate,cumulative infiltration,wet-ted soil volume and the characteristics of soil water content distribution were measured.It is shown that the infiltration rate at different times are accorded with the modified Horton model.The cumulative in-filtration volume is as a parabolic function of irrigation time.The wetted soil volume expands with in-creasing water head,and is small on top but big on bottom,approximately pear-shaped.The growth rate of wetted soil body is relatively slow when the water head is low,the growth rate reaches the maxi-mum in the first 4-6 hours after infiltration,and the growth process yields logarithmic normal distribu-tion.The soil type has a significant influence on the soil water content,but the effect of water head is weak.The soil water distribution uniformity of red loam and sandy loam (>80%)is higher than that of sand (<70%).The results can provide a theoretical basis and practical reference for rational ap-plications of moistube irrigation.关键词
竖插式微润管/土壤质地/压力水头/入渗速率/土壤湿润体/含水率Key words
vertical inserted moistube/soil texture/water head/infiltration rate/soil wetted body/soil water content分类
农业科技引用本文复制引用
余小弟,刘小刚,朱益飞,齐韵涛,杨启良,唐建楷..土壤质地和供水压力对竖插式微润管入渗的影响[J].排灌机械工程学报,2017,35(1):71-79,9.基金项目
国家自然科学基金资助项目（51109102，51469010）；云南省应用基础研究项目（2014FB130）；云南省教育厅重点项目（2011Z035）；大学生创新创业训练计划项目 （）
