Study the Restoration Technology of Concentrated Application-Natural Diffusion about Amendments of Acidified Soil of Hilly Woodland
丘陵林地土壤酸化改良剂的集中施用-自然扩散修复技术研究

Through concentrated application of lime, sewage sludge and lime+sewage sludge on the sloping top of the hilly woodlands, the restoration effects of the three soil amendments on the acidified soil of hilly woodland were studied. The results showed that: 1Joint application of sewage sludge+lime can significantly (P<0.05) decrease soil acidity, promote the rapid increase in soil organic matter and nitrogen content, Increase soil cation exchange capacity, and effectively improve acidified soil. 2Through natural diffusion mechanisms of surface and subsurface runoff, a large area of acidified soil of hilly woodlands can be restored by concentrated application of soil amendments on the sloping top of the hilly woodlands. 3It is conducive to solve the pollution problems of the urban sewage sludge by using municipal sewage sludge to restore acidified soil, but only for the restoration of acidified soil of timber forest.