【摘要】 盐池县扬黄灌区在实施灌溉两年后，有２２０．４５ｈｍ２土地发生了不同程度次生盐渍化，另尚有２１２．１ｈｍ２处在潜在盐化之中。盐池扬黄灌区次生盐渍化发生分布规律为：（１）下伏有第三系红色粘土、且上覆粘土层厚＜２．０ｍ的地区；（２）丘间低地或平缓丘陵中下段处。新灌区应避开在有上述因子存在地区布置。针对盐池灌区土壤次生盐渍化实际，提出了若干防止与治理对策。更多还原

【Abstract】 After 2 years of irrigation there was 220.45hm2 of farmland in the pumping irrigation area in Yanchi county found has produced secondary salinization and another 221.1hm2　under potential salinization. The distributional regularity of secondary salinization in the pumping irrigation area in Yanchi is as follows :(1)In areas where tertiary system red clay was found existing underneath and top clay layer was thinner than 2.0m.(2)Low land between hills and middle and low sections of gentle hills. So these areas should not be considered as suitable locations for new irrigation areas to be developed. In view of the practical situation of secondary salinization of soil in irrigation area in Yanchi some measures for its control and remedy are put forward.更多还原