STUDY ON NUTRIENT ELEMENTS OF LAKE MUD FILLING RECLAMATION SOIL IN COAL MINING SUBSIDENCE AREA
CAOMeng-zhu
FEI Bo
LI Xiang-dong
Abstract：Changes in soil organic carbon (SOC), totalN, totalP, total K concentrations and pH value in the original topography venue were compared with subsided venue, lake mud filling reclamation 5 years and 12 years venue. The soil were sampled every 20 cm from 0 cm to 60 cm. Soil nutrient concentrations were compared among the four venues for 0～20 cm, 20～40 cm, and 40～60 cm soil.The results were as follows: In these four venues, SOC, totalN, total P and total K concentrations decreased in the soil profile from the top to the bottom sampled layer.In the range of 0～20 cm, SOC, total N, totalP, total K concentrations in the soil profile of the lake mud fillingreclamation 12 years venue were higher than the original topography venue.In the range of 20～40 cm and 40～60 cm, SOC, total N, total P, total K concentrations in the soil profiles of the lake mud filling reclamation 12 years venue reached the original topography venue level.SOC, total N, total P and total K concentrations in soil profiles of the lake mud filling reclamation 5 years venue were lower than those in the original topography venue, but appeared a great improvementcompared to the subsided venue.The soil pH values of the four venues were not obviously different. All of them were in the neutral range, which was suitable for the growth of plants and microorganisms.
Keywords：Coal mining areaLake mud fillingReclamationCharacteristics of soil
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 21-24 )