Response of Soil Fertility and Bacterial Community Composition to Vegetation Species in a Coal Mining Subsidence Area: A Survey After 20-Year Reclamation

Wang, Yuming; Yang, Fan; Wang, Qiu-Ya; Zhang, Shiwen; Shi, Yu; Zheng, Xianqing

doi:10.3389/fenvs.2022.937688

Cited by 2 publications

(1 citation statement)

References 52 publications

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“…Several studies examined the variations in soil properties during different reclamation periods and generally observed that soil organic matter and nitrogen content decreased significantly after the reclamation of saline soils [8]. For black soils in Northeast China, it was observed that the initial 20 years of reclamation had much higher rates of decreasing soil nitrogen and organic matter content, after which the soil nitrogen and organic matter content decreased stably [9]. To counteract the carbon and nutrient decline, enhanced fertilizer applications and strengthened nutrient management practices are needed.…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Liu,

Li,

Zhang

et al. 2023

Agronomy

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The saline soils in the Yellow River Delta are primarily affected by seawater intrusion resulting from the intersection of land and sea, which exhibit variations in salinity. The quality of these soils is also influenced by anthropogenic reclamation, including fertilization and irrigation. This study quantitatively evaluated the distinct soil properties and soil quality characteristics of the Yellow River Delta during different reclamation years (i.e., 0a, 1a, 5a, 10a, and 20a) using principal component analysis (PCA) and the Soil Quality Index (SQI). The findings indicated that the soil salt content (SSC) significantly decreased (p < 0.05) from 6.60 g/kg in the initial reclamation year (0a) to 1.63 g/kg in the 10th year (10a) and then slightly increased to 2.85 g/kg in the 20th year (20a). Consequently, the soil salinity level shifted from saline soil to slight salinity and then increased to medium salinity. Ammonium nitrogen (NH4+-N) notably increased by 8.31 mg/kg during the first five years of reclamation (0a to 5a) and gradually decreased by 2.56 mg/kg in the 20th year (20a). On the other hand, nitrate nitrogen (NO3−-N) experienced a significant decrease of 2–5 times after reclamation but continued to increase by 8.96 mg/kg with subsequent reclamation years. The available nitrogen (AN), available phosphorus (AP), and soil organic carbon (SOC) exhibited a significant increase of 24.87 mg/kg, 10.11 mg/kg, and 6.76 g/kg, respectively, with increasing reclamation years. However, available potassium (AK) gradually decreased after reclamation and then increased in the 20th year (20a). The values of SQI for different reclamation years were 0.307 for 0a, 0.339 for 1a, 0.320 for 5a, 0.318 for 10a, and 0.327 for 20a, indicating an increasing trend with increasing reclamation years. It was discovered that long-term reclamation significantly reduced soil salinity and improved soil quality, leading to the sustainable development of reclaimed saline soils in the Yellow River Delta.

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Section: Introductionmentioning

confidence: 99%

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Liu,

Li,

Zhang

et al. 2023

Agronomy

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Spatial Variability in Land Subsidence and Its Relation to Groundwater Withdrawals in the Choshui Delta

Liu

2022

Applied Sciences

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In this article, the characterization of land subsidence with the spatial variability of soil formation and groundwater withdrawals in Choshui delta, Taiwan, is presented. Levelling surveys, borehole logging, multi-layer compaction monitoring network, multi-layer groundwater level monitoring network, and the electricity consumption of wells in the study area are adopted. Various factors, including the percentage of coarse-grained soil, percentage of fine-grained soil, length of average maximum drainage path, percentage of agricultural land use, electricity consumption of wells, and accumulated depth of land subsidence, are applied. Thematic maps based on these factors are established using geographic information system spatial analysis. A principal component analysis (PCA) is then employed to obtain the dominant factors for land subsidence. The results indicate that the largest subsidence rate is observed in the region that has both a high electricity consumption of wells and a large percentage of fine-grained soil. The PCA results reveal that the electricity consumption of wells is highly correlated with the accumulated depth of land subsidence. The first principal component is the acquired factor causing land subsidence, such as the excessive withdrawal of groundwater. The second principal component is the congenital factor causing land subsidence, which corresponds to fine sand, silty and clayey soils.

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Response of Soil Fertility and Bacterial Community Composition to Vegetation Species in a Coal Mining Subsidence Area: A Survey After 20-Year Reclamation

Cited by 2 publications

References 52 publications

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Soil Quality Improvement with Increasing Reclamation Years in the Yellow River Delta

Spatial Variability in Land Subsidence and Its Relation to Groundwater Withdrawals in the Choshui Delta

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