Next Article in Journal
Power Market Equilibrium under the Joint FIP-RPS Renewable Energy Incentive Mechanism in China
Previous Article in Journal
Geochemical Characteristics of Rare Earth Elements in Soils from Puding Karst Critical Zone Observatory, Southwest China
Open AccessArticle

Effect of Underground Coal Mining on the Regional Soil Organic Carbon Pool in Farmland in a Mining Subsidence Area

1
Institute of Land Science, College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China
2
College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241003, China
*
Authors to whom correspondence should be addressed.
Sustainability 2019, 11(18), 4961; https://doi.org/10.3390/su11184961
Received: 20 June 2019 / Revised: 2 September 2019 / Accepted: 4 September 2019 / Published: 11 September 2019
(This article belongs to the Section Sustainable Use of the Environment and Resources)
The soil organic carbon (SOC) pool in farmland is changing rapidly due to human activities, thereby greatly affecting the regional and global environment, as well as influencing soil fertility and crop yields. The present study investigated the effects of underground coal mining on the regional SOC pool in farmland in the Jiuli Mining Area of Xuzhou City in China as a typical coal mining region based on field sampling, chemical analysis, model construction, and spatial analysis using the software of ArcGIS. The results showed that in the mining subsidence area, spatial variations in the SOC content and soil bulk density were mainly caused by structural factors (mining subsidence, subsidence waterlogging, and other structural factors due to coal mining) at a regional scale. SOC storage in farmland soil decreased sharply in non-waterlogged subsidence farmland and seasonally waterlogged subsidence farmland in the areas with mining, whereas the SOC storage increased in waterlogged wetland after coal mining. The SOC was reduced by 102,882 tonnes (32.81%) compared with the original SOC stock as a consequence of coal mining, and thus the effect of underground coal mining on the regional SOC pool in farmland was characterized as a carbon loss process. Land-use changes, soil degradation and erosion contributed almost equally to the carbon loss process in the study area. The results of this study may facilitate evaluations of low-carbon land reclamation and ecological compensation in mining areas. View Full-Text
Keywords: coal mining; carbon loss; evaluation model; kriging interpolation; soil organic carbon pool coal mining; carbon loss; evaluation model; kriging interpolation; soil organic carbon pool
Show Figures

Figure 1

MDPI and ACS Style

Xu, Z.; Zhang, Y.; Yang, J.; Liu, F.; Bi, R.; Zhu, H.; Lv, C.; Yu, J. Effect of Underground Coal Mining on the Regional Soil Organic Carbon Pool in Farmland in a Mining Subsidence Area. Sustainability 2019, 11, 4961.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop