汾河三坝灌区浅层咸水利用的试验研究

山西省汾河三坝灌区淡水资源短缺，是农业生产发展的制约因素。三坝线层地下咸水灌溉试验（１９９０～１９９５）的研究结果表明，利用３．０～５．１ｇ／ｌ的咸水灌溉小麦、玉米、棉花和高梁，均比不灌的增产３０％以上；在春季河灌和汛期集中降雨淋洗的条件下，作物根层土壤不积盐；实行咸淡水轮灌，增辟水源，改善水质，可获作物增产。

Study on Irrigation with Saline Water in the Third Dam Irrigation Area of the Fenhe River

In the third dam irrigation area of the Fenhe River, Shanxi province, the shortage of fresh water resources is one of the restriction in developing the local agriculture. The results of saline water irrigation (1990~1995) showed that the yields of wheat, corn, cotton and grain increased 30% more than those of non-irrigated crops. In the condition of spring irrigation and concentrated rainfall, the soil desalinized in root zone, and the accumulated salt due to saline water irrigation can be leached; reasonable irrigation with saline water and surface water alternatively may enlarge the irrigated farmland, improve groundwater quality and achieve high production of crops.