Soils development in opencast coal mine spoils reclaimed for 1–13 years in the West-Northern Loess Plateau of China

Zhao, Zhongqiu; Shahrour, Isam; Bai, Zhongke; Fan, Wenxiang; Feng, Li; Li, Huifeng

doi:10.1016/j.ejsobi.2012.08.006

Cited by 141 publications

(93 citation statements)

References 28 publications

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“…This indicates that in similar pedogenetic conditions, time has a positive effect on the evolution of the SOC in reclaimed soils [25]. Several chronosequence studies [19,26,28,35] have shown that SOC constantly accumulates in reclaimed soils over time, which shows great potential for carbon sequestration. The carbon sequestration potential of reclaimed soils depends mainly on the biomass they contain and its return to the soil; moreover, the carbon sequestration potential is affected by the mechanism protecting the soil carbon [36].…”

Section: Discussionmentioning

confidence: 90%

“…In the present study, despite the constant increase in the SOC content with the reclamation age, the growth rate was very slow, and the SOC content of R13 was only 1.24 that of R4. Zhao et al [35] found that the SOC content increased rapidly when forest and grassland ecosystems were reconstructed in an open-pit mine area; after 13 years of reclamation, the value reached 3.1 times what it was after four years. This may be because during the reconstruction of forest and grassland ecosystems, the aboveground vegetation biomass and litter constantly increase and undergo humification, which can effectively improve the soil texture and promote the rapid accumulation of SOC.…”

Section: Discussionmentioning

confidence: 99%

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Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Yu-le

et al. 2017

Sustainability

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Soil organic carbon (SOC) plays an essential role in the early stages of pedogenisis and ecological restoration in reclaimed mine soils. Dynamic changes in the SOC content are essential for assessing the quality of reclaimed mine soils and the effect of ecological restoration. To objectively assess the carbon dynamics of reclaimed soils, we selected the surface (0-20 cm) soil of farmland under agricultural use (soybean-wheat rotation) from a reclamation chronosequence (R4: 4 years of reclamation, R7: 7 years of reclamation, R10: 10 years of reclamation and R13: 13 years of reclamation) in the Dongtan Mining Area, Shandong Province, China. The adjacent normal, unaffected farmland was used as a control (CK). The results showed that the SOC content gradually increased with the reclamation age until it reached 7.98 g·kg −1 for R13, which accounted for 76% of that of the CK. However, the total carbon contents of the reclaimed soils did not significantly differ from and even appeared higher than that of the CK. This is mainly because the inorganic carbon contents of the reclaimed soils ranged from 2.98 to 12.61 g·kg −1 , all of which were significantly higher than the 0.87 g·kg −1 obtained for the CK. The microbial biomass carbon (MBC) content and the microbial quotient significantly increased with the reclamation age of the soil, and both parameters were markedly higher for R13 than for the CK. The dissolved organic carbon (DOC) content and its ratio to the SOC were significantly higher for R4-R13 than for the CK and DOC/SOC gradually decreased with the reclamation age. Both the reclamation age and the temperature had positive effects on the soil basal respiration (SBR). The SBR rate constantly increased with the reclamation age and was markedly higher at 25 • C than at 15 • C. The temperature sensitivity (Q 10 ) of the SBR showed a clearly decreasing trend for the reclamation chronosequence, but its value remained higher for R13 than for the CK (2.37). The metabolic quotient constantly decreased with the reclamation age, which suggests that the survival pressure imposed on soil microbes by the soil environment gradually decreased. These results indicate that it takes a long time for organic carbon to accumulate in reclaimed mine soil and that rational agricultural use contributes to sustained improvement of the quality of reclaimed soil.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Yu-le

et al. 2017

Sustainability

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“…Coal mining has made important contributions to economic development, however, with the expansion of the scale of coal mining, it has caused tremendous pressure and severe damage to the local ecological environment (Zang et al 2010;Zhao et al 2013). More than 95 % of coal production is from underground mining in China.…”

Section: Introductionmentioning

confidence: 99%

Role of the different planting age of seabuckthorn forests to soil amelioration in coal mining subsidence land

2014

Int J Coal Sci Technol

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To investigate the effects of seabuckthorn (Hippophae rhamnoides) on soil amelioration, using the space replacement method, soil physical and chemical indexes as well as the microorganism quantity and soil enzyme activities were analyzed. The results showed that: the soil bulk density of surface soil decreased and soil porosity and field capacity increased after afforestation with seabuckthorn. The plant was found to effectively reduce the soil pH, increase the soil conductivity, soil organic matters and available nutrients. Soil microorganism quantity, soil enzyme activities were both higher in 0-20 cm layer than in 20-40 cm layer. With the increase years of remediation with seabuckthorn, the quantity of soil microorganism and enzyme activities were increasing to a higher level 5 to 8 years later. Our study indicates that seabuckthorn can effectively improve soil physical and chemical properties, increase the quantity of soil microorganisms and enzyme activities, which is of great significance for the ecosystem restoration in mining areas.

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“…The annual mean temperature range is from 5.1 • C to 7.1 • C, with a higher temperature in the southeastern and central part and lower values in the hilly region. The average annually effective evaporation, however, is approximately 1152.1 mm, which is almost three times greater than the amount of precipitation [12,36]. Loess soil is widely distributed in this region.…”

Section: Study Watershedmentioning

confidence: 99%

Estimation of Sediment Yield Change in a Loess Plateau Basin, China

Zhang

Karthikeyan

Zhang

et al. 2017

Water

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Soil erosion is one of the most serious land degradation problems and the primary environmental issue in the Loess Plateau region of China. To identify the critical sub-basins and assess the impacts of land use change and climatic variability change on soil loss, this study tested the feasibility of the Soil and Water Assessment Tool (SWAT) model on sediment load simulation in the upper Sang-kan (USK) River basin. Based on a land use map of 1986, the SWAT model (Scenario 0) was calibrated at a monthly step using climate data from 1979 to 1985; then it was validated using climate data from 1986 to 1990. The monthly sediment simulation results indicated that the model did not work as well as streamflow simulation, indicating lower NS (Nash-Sutcliffe Efficiency) and r 2 values of 0.68, 0.69 and 0.61, 0.59 for the calibration period and validation period, respectively. This model could perform well under relatively low rainfall events, but it underestimated or overestimated the sediment load under high rainfall events. Comparing the results of scenarios with different land use maps (year of 1986 vs. 2012) and climate periods (1979-1990 vs. 2001-2012), it can be concluded that: (i) extreme and severe erosion almost always happened in FRST (forest land) and RNGE (grassland) in the hilly area; (ii) long-term traditional farming weakens the soil anti-erosion capability of land, leading to higher soil erosion, while forest can improve the soil structure, enhance the soil anti-erosion capability, and reduce soil erosion; (iii) both land use change and climatic change have led to the sediment yield decrease in the USK basin. Acting as the major influencing factor, land use change contributed to about 64.9% of the sediment yield reduction in the USK river basin.

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Soils development in opencast coal mine spoils reclaimed for 1–13 years in the West-Northern Loess Plateau of China

Cited by 141 publications

References 28 publications

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Carbon Dynamics of Reclaimed Coal Mine Soil under Agricultural Use: A Chronosequence Study in the Dongtan Mining Area, Shandong Province, China

Role of the different planting age of seabuckthorn forests to soil amelioration in coal mining subsidence land

Estimation of Sediment Yield Change in a Loess Plateau Basin, China

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