斥水土壤中水热运动模型的应用

作者运用所建立的斥水土壤中水热运动的数值模型，模拟分析了以下因素对沟中时苗床不分散失与温度的影响：（１）不同的沟垄尺寸；（２）湿润剂；（３）镇压；（４）沟垄的走向。以此为当地的耕种工程设计提供了依据。一般认为土壤斥性严重影响产量，但采用沟种后，表层的斥水土壤形成的不透不的垄能促进雨水渗入沟中，又能阻止水分的蒸发，降低沟中的温度，有利于种子发育出苗，从而使不利因素变化成有利条件。

APPLICATION OF THE MODEL OF HEAT AND WATER MOVEMENT IN WATER-REPELLENT SOILS

A simulation study of the effects of some factors, such as row spacing, ridge height, wetting agent, compaction and the furrow orientation, on the evaporation and soil temperature from water-repellent soils was carried out with the model of heat and water movement in water-repellent soils. Water repellency is a problem for agricultural soils, but furrow cultivation could increase rainfall runoff and infiltration into the furrow, which would make the water-repellent problems tum into an advantage for germrnahon.