Construction and Application of Ecological Remediation Technology for Sandy Soils in Northwest China

Jing Jiang, Qian Wang, Jinmei Zhao (), Jun Zhang (), Bo Dong and Xin Huang
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Jing Jiang: School of Management, Gansu Agricultural University, Lanzhou 730070, China
Qian Wang: School of Management, Gansu Agricultural University, Lanzhou 730070, China
Jinmei Zhao: College of Forestry and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China
Jun Zhang: College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China
Bo Dong: College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China
Xin Huang: School of Management, Gansu Agricultural University, Lanzhou 730070, China

Sustainability, 2023, vol. 15, issue 20, 1-17

Abstract: This study investigated the impact of three ecological restoration methods: PRS, OLRS, and NRM, on the soil quality and ecological environment of the cold plateau area in northwest Sichuan, China. Over a period of 3 years, these restoration modes were applied, and their effects on soil enzyme activity, organic carbon, and nitrogen were critically analyzed. The results demonstrated that PRS was the most effective restoration method, enhancing soil water content, organic activity, and enzyme content the most, followed by OLRS and NRM, respectively. In the 0~60 cm soil layer, each restoration model was able to improve the vegetation characteristics, and the modification effects were PRS > ORRS > NRM > UMD in descending order. After the restoration, the summer surface temperature decreased from 41.3 °C to 23.1 °C. The average moisture content of the soil increased from 3.11% to 5.86%. The average moisture content of the soil increased from 3.11% to 5.86%, and the bulk density decreased from 1.47 g/m 3 to 1.40 g/m 3 , resulting in a more rational soil structure. This research offers invaluable insights into the nutrient restoration mechanism of sandy lands, emphasizing the significant role of appropriate vegetation restoration measures in ecological restoration. The findings further suggest the potential application of the PRS model for optimal soil repair effects in similar ecological settings.

Keywords: northwest Sichuan; soil remediation; enzyme activity; organic carbon; soil nitrogen; ammonia; active enzyme regulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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