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Open AccessArticle

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

by Linghua Duo 1 and Zhenqi Hu 1,2,*
1
Institute of Land Reclamation and Ecological Restoration, China University of Mining and Technology, Beijing 100083, China
2
School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China
*
Author to whom correspondence should be addressed.
Sustainability 2018, 10(11), 4310; https://doi.org/10.3390/su10114310
Received: 20 September 2018 / Revised: 9 November 2018 / Accepted: 18 November 2018 / Published: 21 November 2018
With continuous population growth and decreasing cultivated land area, China’s food security is greatly threatened. Additionally, coal mining in China is primarily underground mining, which causes land subsidence and destroys existing cultivated land. This effect aggravates the contradiction between a growing population and a shrinking area of cultivated land. The purpose of this study was to introduce a method of filling reclamation with Yellow River sediments to restore farmland and realize the sustainable utilization of cultivated land. The properties of the soil and crop yields in reclaimed farmland were assessed. This study examined farmland reclaimed with Yellow River sediments at an experimental site located in Jining City, Shandong Province, China. Filling reclamation procedures with Yellow River sediments were applied. The reclaimed farmland (RF) and unaltered farmland (CK) were continuously monitored for three years, and the soil was sampled six times. A total of 180 soil samples were collected from RF and CK. The soil properties were measured at three depths: 0–20 cm, 20–50 cm, and 50–80 cm. Crop yields were monitored regularly. The results indicate that filling reclamation with Yellow River sediments is an effective method for restoring farmland. The RF and CK soils were weakly alkaline, non-saline soils. The RF soil was suitable for the growth of local crops. With an increasing number of farming years, both the quality of cultivated land and crop yields have increased. Therefore, filling reclamation with Yellow River sediments is an effective way to realize the sustainable utilization of cultivated land. View Full-Text
Keywords: land reclamation; farmland; mining; Yellow River sediments; crop yield; sustainability land reclamation; farmland; mining; Yellow River sediments; crop yield; sustainability
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Duo, L.; Hu, Z. Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments. Sustainability 2018, 10, 4310.

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