长江三角洲地区土壤质量退化的类型、驱动力与对策

STUDY ON THE SOIL DEGRADATION,ITS DRIVING FORCES AND COUNTERMEASURES IN YANGTSE DELTA

本文概述了长江三角洲土壤质量演变过程中存在的一些主要问题。城郊型农业区由于污水的灌溉、污泥的施用而带来重金属的污染 ;集约农业区由于过量施用化肥产生的面源污染 ;丘陵地区属于传统农业区 ,土壤养分较为贫瘠、水土流失严重。针对上述问题提出了提高土壤质量的几点技术措施。

In this paper, the increasing soil quality problems in Yangtse delta have been discussed. There are different problems in the three agricultural regions. In suburb regions, due to application of sewage sludge and P fertilizer, etc., the mainy soil problem is heavy metals contamination. In intensive agriculture areas, excessivey chemical fertilizers have brought serious eutrophication in the rivers and lakes. And in concerned low hilly regions, water loss and soil erosion as well as soil nutrients decrease have taken placed widely. Arming at the above soil problems, some countermeasures have been put forward.