甘肃景电灌区盐碱地综合治理与开发对策

Countermeasures Study of Salinization Comprehensive Treatment and Development in Jingtaichuan Yellow River Pumping-Irrigation Area of Gansu

甘肃景电灌区盐碱地形成的直接诱因是大面积的粗放灌溉和低降雨高蒸发的气象条件,在自然因素和人为因素的共同作用下,灌区盐碱化土地面积呈逐年增大的趋势,土壤次生盐碱化程度不断加重,严重制约着灌区的可持续发展。通过分析土地盐碱化的成因和机理,提出采用农业、生物、化学及水利等综合技术措施的灌区盐碱地综合治理模式,并探索了灌区综合开发的对策。

The direct inducements of salinization are extensive irrigation and weather conditions with low rainfall and high evaporation in des ert Yellow River pumping irrigation region,and the area and degree of secondary salinization soil have grown year by year under influences of both natural and man made factors in desert Yellow River pumping irrigation area′ s closed hydrogeological unit,which seriously restricts the sustainable development of the irrigation area. The comprehensive management measures with agriculture,biology,chemistry and water con servancy of irrigated area′ s saline alkali treatment had been proposed by analyzing the causes and mechanism of salinization in Gansu Jingdi an irrigated region,meanwhile,the development strategies of irrigated area had been explored,which could provides new ideas for sustain able development and utilization of water and soil resources in desert Yellow River pumping irrigation area.