[1]ZHENG Yuanyuan,YU Dun,SUN Congkang,et al.Evaluation on Ecological Security of Cultivated Land in Poyang County of Jiangxi Province Based on State Space Model[J].Research of Soil and Water Conservation,2020,27(03):218-224,237.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
218-224,237
Column:
目次
Public date:
2020-04-20
- Title:
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Evaluation on Ecological Security of Cultivated Land in Poyang County of Jiangxi Province Based on State Space Model
- Author(s):
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ZHENG Yuanyuan1,2, YU Dun1,2, SUN Congkang1,2, WANG Jianping1,2, ZHANG Tian1,2
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(1.College of Land Resources and Environmental Sceinces, Jiangxi Agricultural University, Nanchang 330045, China; 2.Key Laboratory of Poyang Lake Basin Agricultural Resources and Ecology of Jiangxi Province, Jiangxi Agricultural University, Nanchang 330045, China)
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- Keywords:
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ecological security of cultivated land; evaluation; state space model; Poyang County
- CLC:
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F301.21
- DOI:
-
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- Abstract:
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The ecological security of cultivated land has become a national strategic issue concerning the national economy, people's livelihood and sustainable development of society. The analysis and evaluation of cultivated land ecological security of Poyang County, Jiangxi Province can provide a scientific reference for promoting the healthy development of regional cultivated land ecosystem and alleviating the contradiction between people and land. From the three aspects of natural factors, economic factors and social factors, 18 indicators were selected to construct the evaluation index system. The coefficient of variation and entropy method were used to determine the weight, and the state space model method was used to quantitatively evaluate and analyze the ecological security of cultivated land in Poyang County from 2008 to 2017. The results show that the ecological security level of cultivated land in Poyang County presented the the rising trend from 2008 to 2017, and the ecological security of cultivated land was gradually improving. As far as each subsystem was concerned, the subsystem of natural factor had a fluctuating downward trend in 2008—2011, reaching the bottom in 2011, showing an upward trend in 2012—2017, and peaking in 2015; the subsystem of economic factor was continuously fluctuating, showing a the V-shaped situation, reached the peak in 2010, and reached its bottom in 2012; the subsystem of social factor was in a state of continuous fluctuations, showing a steady upward trend. The constructed state space model can accurately evaluate the ecological security level of local cultivated land, indicating that the model has certain applicability in the ecological security evaluation of cultivated land.