【摘要】 滴灌入渗结束时的水盐特征是覆膜滴灌蒸发的初始条件,近年来覆膜种植技术的大面积推广使研究覆膜灌溉的水盐特征很有必要。通过非充分供水条件下滴灌入渗的三维水盐运移实验,分析了湿润锋运移的函数特征和椭圆方程,并对径向含水率剖面进行了研究。基于水分特征,分析了入渗中径向含盐率、径向浓度和径向Na+浓度剖面,并做出了相应水盐特征的等值线图。更多还原

【Abstract】 Water and salt characteristics at the end time of drip source infiltration is the initial condition of evaporation from film holes. The more and more widely application of plastic mulch irrigation makes it more important than ever to study water and salt characteristics under plastic mulch irrigation. Based on 3demensional water and salt transport experiment under drip source infiltration of nonsufficient water supply, the function of wetting front and the characteristics of diagonal soil water content are analyzed. Then, the salt characteristics including salt content, salt concentration and sodium concentration is analyzed. Moreover, the corresponding contour map of soil water and salt characteristics has been drawn out.更多还原