苏北沿海盐土含盐量重,結构差,且耕作层浅,易板結,肥力低。耕作稍有不当,就会导致土壤返盐退化。近几年来在改良盐土过程中,积极发展綠肥,保护地面复盖,增进肥力,抑制返盐。这样,对耕作就提出了新的要求: 1.浅层耕作,耕翻层不宜超过現有熟土层; 2.耕后地面应保留一定的植被复盖,即要求耕作后綠肥呈半掩半埋状态; 3.对含盐量在0.15％以上的盐土,应完全保 Salinization of coastal salt in northern Jiangsu heavy, poor structure, and tillage shallow, easy to knot, low fertility. Tillage slightly improper, it will lead to degradation of soil salt back. In recent years in the process of improving salt, active development of green manure, to protect the ground cover, increase fertility, inhibit back to salt. In this way, put forward new requirements for farming: 1. Shallow tillage, tilling the soil should not exceed the existing mature soil layer; 2. Tillage surface should retain some vegetation cover, which requires farming green manure was half buried half State; 3. salt content of 0.15% or more saline, should be completely protected