| 李洪庆，杨 瑀，张俊红，李文麒.基于 PSR 模型的生态脆弱区山南市土地生态安全评价[J].广东农业科学,2022,49(6):90-99 |
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基于 PSR 模型的生态脆弱区山南市土地生态安全评价 |
| Evaluation of Land Ecological Security in EcologicallyFragile Region of Shannan City Based on PSR Model |
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| DOI：10.16768/j.issn.1004-874X.2022.06.012 |
| 中文关键词: 土地生态安全 压力 - 状态 - 响应（PSR）模型 障碍度模型（ODM） 山南市 |
| 英文关键词: land ecological security Pressure-State-Response (PSR) Model Obstacle Degree Model (ODM) Shannan City |
| 基金项目:国家自然科学基金（41801216） |
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| 中文摘要: |
| 【目的】对西藏自治区山南市土地生态安全进行评价，揭示影响土地生态安全的主要因素，为该
市实现生态环境保护和土地可持续利用提供合理建议，在保障土地生态安全的前提下，推动经济持续健康发展。
【方法】基于压力 - 状态 - 响应（PSR）模型构建土地生态安全评价指标体系，评价山南市 2010—2020 年土地
生态安全状况，并通过障碍度（ODM）模型识别影响土地生态安全的主要因素。【结果】2010—2016 年山南市
土地生态安全指数处于 0.41~0.50 之间，呈小幅度波动；2016—2018 年持续下降至 0.44；2018—2020 年快速上
升，由 0.44 攀升至 0.69，其演变趋势与山南市经济发展和生态环境保护策略密切相关。压力、状态、响应指数
中，压力指数对生态安全的影响变化不大，在生态安全指数中的占比由 2010 年的 29.19% 提高至为 2020 年的
31.46%；状态指数对生态安全的影响大幅下降，占比由 41.62% 下降至 29.39%；响应指数对生态安全的影响大
幅攀升，占比由 29.19% 升高为 39.16%。2010—2020 年间山南市土地生态安全的主要影响因素为人均 GDP、农
村人均可支配收入、环境保护年支出和固定资产投资。 【结论】为了保障山南市土地生态安全，建议未来在快
速发展经济、提高人均 GDP 和农村人均可支配收入的同时，协调统筹增加环境保护年支出、优化固定资产投资
结构等。 |
| 英文摘要: |
| 【Objective】The study evaluated the land ecological security in Shannan City of Tibet Autonomous Region,
revealed the main factors affecting the land ecological security, with a view to providing reasonable suggestions for the
realization of ecological environment protection and sustainable land use in Shannan City, and promoting the sustainable
and healthy economic development on the premise of ensuring the land ecological security. 【Method】An evaluation
index system of land ecological security was established based on Pressure-State-Response (PSR) Model to evaluate the
state of land ecological security in the city from 2010 to 2020, and the main factors affecting land ecological security were
identified by Obstacle Degree Model (ODM).【Result】From 2010 to 2016, the land ecological security index of Shannan
City was between 0.41 and 0.50, showing a slight fluctuation. It continued to decrease from 2016 to 2018, and decreased to
0.44. From 2018 to 2020, the land ecological security index increased rapidly from 0.44 to 0.69, which was closely related to the economic development and ecological environment protection strategies of Shannan City. Among the pressure, state and
response indexes, the impact of pressure index on ecological security had little change, and its proportion in ecological security
index increased from 29.19% in 2010 to 31.46% in 2020. The influence of state index decreased significantly from 41.62%
in 2010 to 29.39% in 2020. The influence of response index increased significantly, from 29.19% in 2010 to 39.16% in 2020.
The main influencing factors of land ecological security in Shannan City from 2010 to 2020 were per capita GDP, per capita
rural disposable income, annual expenditure of environmental protection and fixed-asset investment.【Conclusion】In order
to en sure the land ecological security of Shannan City, it is suggested to increase the annual expenditure of environmental
protection and optimize the investment structure of fixed assets in a coordinated way while developing economy rapidly and
increasing per capita GDP and rural per capita disposable income in the future. |
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