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以磷石膏等作为改良剂,改良康平县盐碱地土壤,并开展小麦、玉米大田试验研究。改良后在无灌溉并疏于管理条件下小麦667 m~2产量为270 kg,玉米667 m~2增产50%,土壤中w(盐)下降90%,pH下降18.2%。研究结果表明,改良剂能改善土壤结构,选用稻壳做隔离层能减少土壤水分蒸发从而抑制盐分的表聚,降低耕作层盐分含量,增加土壤通透性,反盐现象得到制止。拟在大面积耕地中,努力开拓盐碱地开发利用新途径,积极推进盐碱地资源的生态利用与产业化的开发。
Phosphogypsum as a modifier to improve soil salt and alkali soil in Kangping County, and wheat, corn field trials. The yield of 667 m ~ 2 was 270 kg and the yield of corn 667 m ~ 2 was increased by 50% under the condition of no irrigation and neglect management. The content of w (salt) in soil decreased by 90% and the pH decreased by 18.2%. The results showed that the improver could improve the soil structure. Using rice husk as isolation layer could reduce the evaporation of soil moisture, inhibit the aggregation of salt, reduce the salt content in the tillage layer, increase the permeability of soil and prevent the anti-salt phenomenon. In a large area of arable land, it is proposed to explore new ways of exploitation and utilization of saline-alkali land and actively promote the ecological utilization and industrialization of saline-alkali soil resources.