[1]WEN Gaohui,WANG Zicheng,HE Qing,et al.Eco-environmental Risks and Decoupling Effects of Fertilizer Non-Point Source Pollution in Dongting Lake Plain[J].Research of Soil and Water Conservation,2023,30(04):301-308.[doi:10.13869/j.cnki.rswc.2023.04.004.]
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Eco-environmental Risks and Decoupling Effects of Fertilizer Non-Point Source Pollution in Dongting Lake Plain
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 04
Page number:
301-308
Column:
Public date:
2023-06-10
- Title:
- Eco-environmental Risks and Decoupling Effects of Fertilizer Non-Point Source Pollution in Dongting Lake Plain
- Keywords:
- cultivated land; non-point source pollution; risk assessment; decoupling relationship; Dongting Lake Plain
- CLC:
- X592; F303.4
- DOI:
- 10.13869/j.cnki.rswc.2023.04.004.
- Abstract:
- [Objective] The decoupling of agricultural economic growth from the eco-environmental risk of fertilizer non-point source pollution was promoted, so as to provide theoretical support for the effective control of the non-point source pollution of cultivated land and the sustainable use of cultivated land. [Methods] Based on the eco-environmental risk assessment model, the eco-environmental risk of fertilizer non-point source pollution in each area of the Dongting Lake Plain was evaluated at the county level, and the regional difference of the eco-environmental risk of fertilizer non-point source pollution in Dongting Lake Plain was estimated by non-parameter kernel density, and then the decoupling model was used to further analyze the decoupling relationship between agricultural economic growth in the Dongting Lake Plain and the eco-environmental risk of fertilizer non-point source pollution on cultivated land. [Results](1)From 2009 to 2019, the eco-environmental risk index of fertilizer non-point source pollution in the Dongting Lake Plain showed a trend of rising first and then falling. The eco-environmental risk index of fertilizer non-point source pollution first rose from 0.749 in 2009 to 0.762 in 2014, and then decreased to 0.732 in 2019, first from moderate risk to high risk, and then to moderate risk. Pollution in the central region was more serious.(2)The regional differences in the ecological environment risk of fertilizer non-point source pollution were obvious, showing the characteristics of decentralized agglomeration of two poles, and the internal gap was first expanded and then narrowed.(3)The decoupling relationship between agricultural economic growth and the eco-environmental risk of fertilizer non-point source pollution in the Dongting Lake Plain showed obvious stage characteristics: the first stage was the fluctuation period(2009—2013), and the second stage was the strong decoupling period(2014—2019). [Conclusion] With the promotion of cultivated land source pollution control, the eco-environmental risks of fertilizer non-point source pollution in Dongting Lake Plain had experienced a trend of first rising and then falling, showing obvious regional differences, and the stable decoupling from agricultural economic growth had been basically achieved, and the overall trend of green and sustainable development had been presented.
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Last Update:
2023-06-10