长期用自来水、井水等含盐分较多的水浇灌的盆花,常常可以看到,在花盆土壤表面聚集了一层白色或黄白色,外观像霜一样的物质,这就是盐的结晶。这是因为溶于土壤水分中的盐分,在土壤水分蒸发过程中随土壤水分上升到土壤表面,水分蒸发后,盐分被留在土壤表面而形成的。浇水后,一部分盐分结晶重新溶解于水,并随着水分向下渗透,被重新带回到盆土内部。土壤表面形成盐分结晶,说明土壤中含盐分较多。 Long-term use of tap water, well water containing salt water more potted water, you can often see, in the flower pot soil surface gathered a layer of white or yellowish white, the appearance of cream-like material, which is salt crystallization. This is because the salinity dissolved in soil moisture rises as the soil moisture evaporates to the surface of the soil. After the water evaporates, salt is left on the surface of the soil. After watering, a portion of the salt crystals are redissolved in the water and back again to the interior of the basin as the water penetrates downward. The formation of salt crystals on the soil surface, indicating that soil contains more salt.