土地盐碱化的原因是什么

问题描述：

土地盐碱化的原因是什么

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最佳答案：

主要是由于地下水位上升,土地表层盐分积累所致.在内陆干旱地区,过度灌溉汇集后的水盐没有出路,导致下游地下水位增高,地表蒸发,形成盐碱化.在海滨滩涂地区,则由于过度抽取地下水,使海水入侵而造成盐碱化.

   

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