|Table of Contents|

Effects of Municipal Sewage Sludge Addition on Soil Quality in a Rocky Desertification Area

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2019年15
Page:
99-107
Research Field:
Publishing date:

Info

Title:
Effects of Municipal Sewage Sludge Addition on Soil Quality in a Rocky Desertification Area
Author(s):
YANG Dan; LI Mian; HE Shaodong; GUAN Qingli
(College of Biological and Environmental Engineering,Guiyang University,Guiyang,Guizhou 550005)
Keywords:
rocky desertification; municipal sewage sludge; water-holding capacity; soil nutrient; soil microbial biomass
PACS:
-
DOI:
10.11937/bfyy.20190067
Abstract:
In order to assess the impact of municipal sewage sludge (MSS) on soil quality in Karst rocky desertification regions,a simulated soil ripening experiment was conducted,in which soil sampled in a rocky desertification region and MSS collected from a domestic sewage treatment plant were the test materials.Soil water-holding capacity,nutrient content and soil microbial biomass were analyzed in soils added with 20% to 75% of MSS.The results showed that,as the addition rate of MSS increased,saturated water content of soil increased by 22.04%-67.07%,the water-holding time prolonged 5.19-16.25 days,and soil organic carbon,nitrogen,phosphorus and microbial biomass increased significantly.However,the increase of soil microbial biomass was not proportional to the application dosage of MSS.Soil microbial biomass were obviously higher in soils with 20%-35% MSS addition than that with high proportion of MSS.The contents of Cd and Zn even exceeded the standard of soil quality while added with 50%-75% MSS in soil.Therefore,soil water-holding capacity and fertility in rocky desertification region could be improved with suitable dosage of MSS amendment,and low rate application (20%-35%) would take advantage of such effect.

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Last Update: 2019-08-16