棚室土壤积盐大体可分为4个阶段:第一阶段,土壤全盐浓度在3000毫克/千克以下,此期大多数蔬菜不会受害,但对耐盐能力较弱的草莓可能部分受害;第二阶段,土壤全盐浓度0.3％～0.5％,这阶段主要因为盐分的积累而使得作物对水分和养分的吸收失去平衡,从而间接地对作物生长发育产生障害,如辣椒、番茄产生脐腐病,果菜类蔬菜的果实膨大缓慢;第三阶段,土壤全盐浓度 The soil salt accumulation in the greenhouse can be divided into four stages: In the first stage, the total salt concentration in the soil is below 3000 mg / kg. Most of the vegetables in this period will not suffer, but some of the weaker salt-tolerant strawberries may partially suffer. In the second stage, the soil total salt concentration is 0.3% ~ 0.5%. This stage is mainly due to the accumulation of salt, which makes the crop unbalanced the absorption of water and nutrients, which indirectly causes the crop growth and development disorders, such as pepper, tomato produce umbilical rot Illness, fruits and vegetables vegetables expand slowly; the third stage, the soil full salt concentration