摘要
通过室内试验分析了尿素肥液浓度对一维垂直积水入渗的累积入渗量、湿润锋以及入渗结束后土壤含水量的分布影响。结果表明:累积入渗量和湿润峰运移距离随着尿素肥液浓度的增大而减小;在不同区域,尿素肥液浓度对土壤含水量分布影响不同,在传导区,土壤含水量随着肥液浓度的增大而增大,在湿润区,土壤含水量随着肥液浓度的增大而减小。研究结果可以为农田灌溉施肥技术提供支持。
Through indoor experiments under one-dimensional infiltration,the influence of urea solution concentration on accumulative infiltration and wetting front and the distribution of soil water after infiltration is analyzed.The results indicate that accumulative infiltration and wetting front transport distance decreases as solution concentration increases.The influence of urea solution concentration on the distribution of soil water is different in different areas.In transmit areas,the moisture content increases as solution concentration increases,the moisture content increases.In damp areas,the moisture content decreases as solution concentration increases.These results provide theoretic proofs for developing farmland irrigation and fertilizer application.
出处
《中国农村水利水电》
北大核心
2011年第6期67-69,共3页
China Rural Water and Hydropower
关键词
尿素
溶液浓度
垂直一维入渗
urea
solution concentration
one-dimension vertical infiltration
