苏南菜地土壤酸化特点及成因分析

Study on the Characteristic and Cause of Vegetable Soil Acidification in the Area of Southern Jiangsu Province

菜地利用方式下的土壤,其酸化特点不同于其他利用方式下的土壤,本文着重研究昆山地区菜地土壤的酸化特点.结果表明:菜地土壤酸化程度明显高于稻田土壤;上层土壤 pH值低于下层,酸化更明显;而且土壤酸化程度随着菜地种植年限的增加而加剧,不同时间区间内的菜地土壤,酸化程度和酸化特性都有所不同.氮肥的过量施入、不合理的菜地种植模式和种植方式是加剧菜地土壤酸化的主要原因,文章根据酸化的原因提出了相应对策.

Different land use influences soil acidification.This paper worked over the characteristic of vegetable soil acidification by means of some experiment between soil on vegetable soil and paddy soil. Results indicate that the former pH was far lower than the latter one and the pH of topsoil is lower than that of subsoil, and the planting age was positively correlated to the declining degree on soil pH. The cause of soil acidification focused on the increasing input of fertilization, false planting pattern and planting method. Based on those factors, some countermeasures were advanced to slow soil acidification and mend the vegetable soil.