中重度盐化土壤生态恢复技术模式(二)

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中重度盐化土壤表现为盐斑面积一般占70%左右;重度几乎寸草不生。土壤透水性一般,盐份随水进入地表,由于蒸发量大,使大量盐份蓄积地表,形成“表聚”现象。重度碱化盐土植被难于生存,只有少量碱蒿、芦苇、红柳等,群落总盖度因土壤含盐量和地下水埋深的变化而有很大差异,一般地下水位较高,0.6-1.5米。主要理化性质是:全盐≥7.0g/kg,碱化度≤20%,p H≤7.0。因此,生态恢复主要技术如下: Moderately salinized soil showed salinization generally account for about 70% of the area; severe grass almost no births. Soil water permeability in general, salt with the water into the surface, due to evaporation, so that a large amount of salt accumulation on the surface, the formation of “table poly ” phenomenon. Severe alkalized saline soil vegetation is difficult to survive, only a small amount of Artemisia, reed, red willow, etc., the total coverage of the community due to changes in soil salinity and groundwater depth are very different, the general groundwater level higher, 0.6-1.5 meters. The main physical and chemical properties are: full salt ≥ 7.0g / kg, alkalization ≤ 20%, p H ≤ 7.0. Therefore, the main technologies of ecological restoration are as follows:
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