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大棚蔬菜种植超过4年以上的,土壤积盐程度严重,对作物生长极为不利,下面介绍如何观察判断积盐程度对蔬菜造成的危害和改造。一是观察土表①没有发生积盐的土壤渗水比较快,发生积盐后,水的下渗困难。②土壤一干燥,地表就变成白色。③腾出的地稍一搁置,地面就出现白色结晶,表面积
Greenhouse vegetables planted more than 4 years, soil salinity serious, very unfavorable to crop growth, the following describes how to observe the degree of salt accumulation on vegetables caused by the damage and transformation. First, observe the soil surface ① no seepage of soil seepage water faster, after salt accumulation, water infiltration difficulties. ② When the soil is dry, the surface becomes white. ③ vacated a little shelved, the ground appeared white crystal, surface area