Ecological Security Evaluation and Obstacle Factors Diagnosis of Cultivated Land in Dongting Lake Plain from 2007 to 2017

Wen Gaohui; Yuan Quan; Zhao Yi; Xiong Zixin; Zhang Man

doi:10.13961/j.cnki.stbctb.2021.02.024

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Ecological Security Evaluation and Obstacle Factors Diagnosis of Cultivated Land in Dongting Lake Plain from 2007 to 2017

- Ecological Security Evaluation and Obstacle Factors Diagnosis of Cultivated Land in Dongting Lake Plain from 2007 to 2017
- Bulletin of Soiland Water Conservation Vol. 41, Issue 2, Pages: 178-187(2021)
- 作者机构：
  
  1. 湖南师范大学地理科学学院,湖南,长沙,410081
  2. 地理空间大数据挖掘与应用湖南省重点实验室,湖南,长沙,410081
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.02.024
  CLC： F301.21
- Published：2021
- 稿件说明：
移动端阅览
Wen Gaohui, Yuan Quan, Zhao Yi, et al. Ecological Security Evaluation and Obstacle Factors Diagnosis of Cultivated Land in Dongting Lake Plain from 2007 to 2017[J]. Bulletin of Soiland Water Conservation, 2021, 41(2): 178-187.
DOI：

Wen Gaohui, Yuan Quan, Zhao Yi, et al. Ecological Security Evaluation and Obstacle Factors Diagnosis of Cultivated Land in Dongting Lake Plain from 2007 to 2017[J]. Bulletin of Soiland Water Conservation, 2021, 41(2): 178-187. DOI： 10.13961/j.cnki.stbctb.2021.02.024.

摘要

[目的] 研究洞庭湖平原耕地生态安全状况，并诊断其障碍因子，为区域耕地合理利用和耕地污染治理提供参考依据。[方法] 基于DPSIR模型构建洞庭湖平原耕地生态安全评价指标体系，从县域尺度，采用基于熵权的改进TOPSIS模型测度洞庭湖平原2007—2017年耕地生态安全指数，并采用障碍度模型诊断耕地生态安全状态的主要障碍因子。[结果] 2007—2017年洞庭湖平原整体耕地生态安全程度处于临界状态，整体安全指数在研究期内波动上升但增速缓慢；不同县（区、市）耕地生态系统安全变化特征不一；中低产田改良比例、秸秆还田比例、测土配方施肥比例、农药使用强度、地膜使用强度、化肥施用强度、农业自然灾害成灾比例等是制约耕地生态安全的主要障碍因子。[结论] 为改善洞庭湖平原耕地生态安全状况，应大力实施全域土地综合整治，加强农业面源污染治理。

Abstract

[Objective] The ecological security status of cultivated land was evaluated and its obstacle factors were diagnosed in Dongting Lake plain

in order to provide reference for rational utilization and pollution control of cultivated land.[Methods] The ecological security evaluation index system of cultivated land in Dongting Lake plain was established based on DPSIR model. From the county scale

the improved TOPSIS method based on entropy weight was used to calculate the cultivated land ecological security status in Dongting Lake plain from 2007 to 2017. And the obstacle degree model was employed to diagnose the main obstacle factors of cultivated land ecological security status.[Results] The ecological security degree of cultivated land in Dongting Lake plain was in a critical state from 2007 to 2017. The comprehensive index of cultivated land ecological security fluctuated and increased slowly during the study period. The change characteristics of cultivated land ecosystem security in different counties were different. The main obstacle factors restricting the ecological security of the cultivated land system included the improved proportion of medium and low yield field

the proportion of straw returning

the proportion of soil testing and formulated fertilization

the intensity of pesticide use

the intensity of plastic film use

the intensity of fertilizer use

and the proportion of agricultural natural disasters.[Conclusion] To improve current ecological security status of cultivated land in Dongting Lake plain

comprehensive land consolidation should be implemented and agricultural non-point source pollution control should be strengthened.

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