【摘要】 对现阶段小规模引水灌溉后土壤盐碱化状况的调查研究,表明:现阶段灌溉水质良好,低水位引水和排水条件改善使区域水盐平衡向脱盐脱碱方向发展,沿线地区土壤均无发生次生盐碱化的迹象。但初步预测大规模引水后,由于高水位输水及灌区水量增加,在某些地段存在发生次生盐碱化的可能。更多还原

【Abstract】 The present status of soil saline and alkali after diverting water for irrigation on a small scale (DWSS) was studied, and the possible districts of secondary saline and alkali after diverting water on a large scale (DWLS) was predicted. The result indicates that the quality of irrigation water is good at present. Diversion at low water level and improvement in drainage condition make the water-salt balance developing towards desalinization. There is no sign of the occurrence of secondary saline and alkali in the districts along the Xuhong River after DWSS. However, secondary saline and alkali may occur in some sections because of diversion at high water level and increased water in irrigated areas after DWLS.更多还原