1、大棚内土壤盐渍化的原因 (1)因不受降雨的影响,大棚土壤中的盐分不能随雨水流失或淋溶到土壤深层中去,从而残留在耕层内。 (2)大棚栽培灌水次数频繁。使土壤的团粒结构遭到破坏。形成板结层,大孔隙减少,通透性变差,盐分不能渗透到土壤深层,水分蒸发后使盐分积累下来。 (3)地势低洼,土壤湿度大, 1, the reasons for soil salinization in the greenhouse (1) due to the impact of rainfall, the soil in the greenhouse salt can not drain or leaching into the soil with rainfall, and thus remain in the tillage. (2) Greenhouse cultivation and irrigation frequency frequently. So that the aggregate structure of the soil has been destroyed. The formation of the plate layer, the reduction of macropores, poor permeability, the salt can not penetrate into the soil, the evaporation of water to make the accumulation of salt. (3) Low-lying, large soil moisture,