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一、盐碱土改良的目的根据江苏省滨海盐土改良经验,通过治水改土、增肥改土、轮作改土,包括改善农田生态系统,达到在降低土壤含盐量的基础上,既要高产稳产,持续增产;还要建立优质、低耗、高效和协调无害的农田生态系统,保证农民增加收入,土壤增加有机质的目的.他们之所以总结出这样的改良目的,是根据比较彻底地改良盐碱土的需要.二、盐碱土改良的理论依据查明盐碱土的成因,作为理论依据,以利进行最有效的改良.影响盐碱土生成的主要单项因子有水、盐、植被和遗留的有机质.先说水和盐的作用.土壤中易溶于水的盐分,常随水的运动而运动.大地的盐分主要来源于岩石风化.在随水运动过程中,使土壤母质和地下水都含有一定盐分;还有海潮的浸渍,也能把盐分带到陆地.
First, the purpose of improving saline-alkali soil According to the experience of coastal saline soil improvement in Jiangsu Province, through water and soil improvement, fertilizer and soil improvement, crop rotation and soil improvement, including improving farmland ecosystems, to achieve the reduction of soil salt content, based on both high and stable yield , Continue to increase production, but also to establish a high quality, low consumption, efficient and coordinated harmless farmland ecosystems to ensure that farmers increase income, soil organic matter purposes.Therefore, they have summarized the purpose of this improvement is based on a more thorough improvement of salt Alkaline earth needs Second, the theoretical basis for the improvement of saline-alkali soil To identify the causes of saline-alkali soil, as a theoretical basis for the most effective improvement of the main single factors affecting the formation of saline-alkali soil are water, salt, vegetation and the remaining organic matter. First, the role of water and salt.Salt soluble in water, often with the movement of water movement.Great salt mainly from rock weathering.With the process of water movement, so that the soil parent material and groundwater contain some salt ; There is the tide of the impregnation, but also the salt to the land.