暗管排水改良滨海盐土的效果及其适宜条件

本文叙述了山东打渔张灌区的自然条件,进行暗管排水改良滨海盐土试验的由来、工程布局和试验效果的观测、分析,并由此而提出了暗管排水的适宜条件。试验是在1978-1984年进行的,结果表明,暗管排水在滨海粉砂壤土地区确实可以增加排水排盐量,降低潜水位,提高土壤排蒸比,加速土体脱盐和潜水淡化,增产粮棉,防止粉砂壤土明沟塌坡,是一条改良滨海盐土的有效途径。

EFFECTS AND CONDITION OF THE UNDERGROUND DRAINAGE FOR IMPROVING SALINE SOIL OF COASTAL REGION

This paper deals with the natural-conditions of Dayuzhang irrigation area in Shandong Province, the experiment of undlergrownd drainagre for improving saline soils in these area's, the observations and analysis of its effect and. the suitable condition of underground drainage. The experiment was eanductrd from 1978 to 1984. The results obtained indicated that the underground drainage could davain off the water and salt from soil, lower ground water table, increase the ratio of drainage to exaporation of the soil, speed up desatination of soil and ground water, intrease the yeeid of crops.and coon, avoid, the sliding of slopes of open ditch on silty soil. It is considered that undergroutad drainage hs an effectuie way to improve saline soil in coastal regions.