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介绍土壤盐渍化的危害及盐碱地化学改良技术。进行磷石膏、粉煤灰、糠醛渣配合使用的木箱容器实验,对盐碱地的改良起到较好的效果,w(盐)下降58.1%,pH下降22.97%,碱化度下降31.18%,但后期土壤发生表聚反盐现象。因此选用硅藻土混合物、废旧薄膜、树叶混合物为隔离层进行模拟大田实验,通过不同的处理发现可以破坏土壤毛细管的连续性,减少土壤水分的蒸发,抑制盐分的表聚,降低耕作层盐分的含量,在土壤30 cm深处加隔离层较为优化,总盐度降低88.47%,pH下降22.9%,总碱度下降31.61%,反盐现象得到改善。
Describe the hazards of soil salinization and chemical modification of saline land. The experiment of wooden box container with phosphogypsum, fly ash and furfural residue had good effect on the improvement of saline-alkali soil. The w salt decreased by 58.1%, the pH decreased by 22.97% and the alkalization degree decreased by 31.18% Late soil surface poly-salt phenomenon. Therefore, we choose diatomite mixture, waste film and leaf mixture as the isolation layer to simulate the field experiment. Through different treatments, it can destroy the continuity of capillary in soil, reduce the evaporation of soil moisture, restrain the aggregation of salt and reduce the salinity Content, the depth of 30 cm in the soil plus isolation layer is more optimized, the total salinity decreased 88.47%, pH decreased 22.9%, total alkalinity decreased 31.61%, anti-salt phenomenon has been improved.