康平县盐碱耕地化学改良技术的研究

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。

Study on chemical modification technology of saline alkali land in Kangping County

The saline alkali land of Kangping is improved by modifier such as phosphorus gypsum, and the field test of wheat and corn are carried out. After soil improvement, the wheat yield is 270 kg per 667 m2 under the condition of without irrigation and field management, the yield of corn increases by 50%, the total salinity decreases by 90%, pH 18.2%. The results show that the modifier can improve the soil structure, using rice husk as isolation course can reduce the evaporation of moisture and inhibit accumulation of salt on surface, reduce soil content of tillage, increase the permeability of soil and stop the anti salt phenomenon. Strive to explore new ways to develop and use saline land, and promote the ecological use of saline land and the development of industrialization actively in the large area of arable land.