我国江苏北部淮阴等地,在地下一米左右或更深处埋藏有一层老沼泽土层,富含有机质,有明显的小团块状结构,农民称之为“黑土”。当地农民有用翻盖“黑土”的办法来改良盐渍土的习惯。盐渍土在翻盖“黑土”后,抑制了地表返盐,增产效果显著。众所周知,土 Huaiyin and other places in northern Jiangsu Province of China have buried a layer of old swamp soil layer about one meter underground or deeper, which is rich in organic matter and has obvious small lumpy structure. Farmers call it “black soil.” Local peasants have the advantage of clamshell “black soil” to improve the habit of saline soil. Salted soil in clamshell “black soil”, the inhibition of the surface salt return, significant yield increase. As we all know, soil