黄土高原土壤在不同给水条件下的蒸发性能

Soil Evaporation Behaviors Under the Different Water Supplies on the Loess Plateau

在田间土柱模拟试验的基础上,研究了黄土高原土壤在不同给水条件下的蒸发移动性能。可以看出土壤蒸发和降水特征密切相关。自然界土壤蒸发不是一个单一的过程,而是和土壤水分的再分布过程并存,水分在土壤中的向下再分布过程具有显著削弱土壤蒸发的作用。研究还表明,不同质地的土壤在给以相同的水量后,其蒸发量相近;质地不同未造成土壤间蒸发量的显著差异。

Based on the soil column simulation experment in the field,this paperstudies soil evaporation behaviors under the different water supplies on the Loessplateau,and also points out that soil evaporation has a direct bearing on thebehaviors of rainfall.Soil evaporation in the natural world is not a single pro-cess,but it is accompanied by soil water redistribution;soil water downwardredistribution can apparently weaken soil evaporation.At the same time,thestudy shows that an amount of evaporation is very close when soils with diffe-rent textures are supplied with the same amount of water and difference in anamount of evaporation is not caused by the difference in the texture.