近几年来，我们沿海一带的土壤出现了不同程度的返盐现象，有些田块较为严重。１９９５年我在跃华村搞旱育秧示范，当水稻秧苗长到三叶期时，秧苗根系瘦弱变细，叶片发枯而死。分析其原因，该田块的土壤ｐＨ９．５。再查对１９８６年土壤普查资料，该地区的土壤ｐＨ７．５... In recent years, the soil along the coast of our country has returned to salt to some extent, with some fields more serious. In 1995, I conducted a demonstration of nursery seedlings at Yuehua Village. When the rice seedlings grew to a three-leaf stage, the roots of the seedlings became thinner and thinner, and the leaves withered and died. Analysis of the reasons, the field of soil pH9.5. Then check the 1986 soil census data, the region’s soil pH7.5 ...