摘要
通过温室内的渗灌试验,研究温室条件下采用节点渗灌时土壤中的水分运动规律,主要包括灌水结束时土壤含水率的分布、灌水结束后土壤水分再分布过程,即土壤湿润锋的运移及湿润区内的土壤含水率分布状况。试验结果表明,入渗过程中土壤含水率的分布是以渗灌管为中心向外逐渐减小,并且随着灌水历时的增加其重心逐渐下移。在土壤水分的再分布过程中,水分继续向外扩散,中心含水率减少,整个区域上的湿度梯度变缓。
Through the field test on permeation irrigation in the greenhouse, this paper studies the soil moisture movement law under the node permeation irrigation, that mainly included soil moisture distribution during irrigating and soil moisture redistribution after irrigation, namely movements of soil moist sharp point and the distribution state of soil moisture content in the moist district. The result of the test shows that soil moisture content distribution reduced gradually outwards in charge of permeation irrigation pipeline for the center. Gravity center moved down gradually with time lasting. The soil moisture continues to spread outwards during soil moisture redistribution. The humidity gradient becomes slow over the area, where the moisture content of center reduces.
出处
《节水灌溉》
北大核心
2003年第6期1-3,共3页
Water Saving Irrigation
基金
教育部博士点基金(项目编号970304)
辽宁省博士起动基金(20021040)资助项目
关键词
渗灌
土壤湿润锋
土壤含水率
permeation irrigation moist sharp point soil moisture content
