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中国农学通报 ›› 2021, Vol. 37 ›› Issue (1): 108-115.doi: 10.11924/j.issn.1000-6850.casb2020-0316

所属专题: 资源与环境 耕地保护

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

贵阳市1998—2018年土地资源承载力分析与预测

代磊1(), 王志杰1,2(), 张万胜1   

  1. 1贵州大学生命科学学院,贵阳 550025
    2山地生态与农业生物工程协同创新中心,贵阳 550025
  • 收稿日期:2020-08-01 修回日期:2020-09-22 出版日期:2021-01-05 发布日期:2020-12-25
  • 通讯作者: 王志杰
  • 作者简介:代磊,男,1998年出生,贵州贵阳人,硕士研究生,研究方向:区域与景观生态、喀斯特山地城市生态。通信地址:550025 贵州贵阳花溪区 贵州大学西校区生命科学学院,E-mail:dai.35@qq.com
  • 基金资助:
    国家自然科学基金项目“西南喀斯特丘陵区坡耕地土壤侵蚀对土地资源承载力的影响机制”(41701319);贵州省科技支撑计划项目“基于多光谱遥感的喀斯特高原典型植物群落定量识别分类综合技术研究”(黔科合支撑[2017]2854)

Analysis and Prediction of Land Resources Carrying Capacity of Guiyang City from 1998 to 2018

Dai Lei1(), Wang Zhijie1,2(), Zhang Wansheng1   

  1. 1College of Life Science, Guizhou University, Guiyang 550025
    2Collaborative Innovation Center of Mountain Ecology and Agricultural Bio-engineering, Guiyang 550025
  • Received:2020-08-01 Revised:2020-09-22 Online:2021-01-05 Published:2020-12-25
  • Contact: Wang Zhijie

摘要:

为揭示和预测快速城市化与生态建设双重背景下喀斯特山地城市贵阳市土地资源承载力的时间动态,从耕地承载力、生态承载力和社会经济承载力出发,运用熵权法对贵阳市1998—2018年土地资源承载力进行评价,引入障碍度模型得出贵阳市土地资源承载力的障碍因素,并预测研究区未来10年土地资源承载力的发展趋势。结果表明:1998—2018年贵阳市土地资源承载力逐渐上升,从1998年的0.1809上升到2018年的0.8908,年均增长0.0338,由危机状态转变为富裕状态。各子系统对贵阳市土地资源承载力的贡献程度不一,不同时间段内不同子系统对土地资源承载力的贡献不同,2005年以前主要是以耕地承载力的贡献最大,2005年以后则是以社会经济承载力和生态承载力为主导。城市建成区绿化率、就业人口数量和固定资产投资密度是贵阳市土地资源承载力的直接障碍因子,人均粮食产量、人均水资源量和人口密度是潜在障碍因子。未来10年贵阳市土地资源承载力持续增加,达到富裕状态。研究可为贵阳市生态环境建设与保护、社会经济可持续发展以及国土三生空间规划提供重要的科学依据。

关键词: 土地资源承载力, 熵权法, 子系统, 障碍度模型, 灰色预测模型, 贵阳市

Abstract:

To reveal and predict the time dynamics of land resources carrying capacity of karst mountain city Guiyang under the background of rapid urbanization and ecological construction, based on the carrying capacity of cultivated land, ecological carrying capacity and social-economic carrying capacity, the authors used the entropy weight method to evaluate the carrying capacity of land resources of Guiyang from 1998 to 2018, and introduced the obstacle degree model to get the obstacle factors of land resource carrying capacity and forecast the development trend of land resources carrying capacity in the future decade. The results showed that: from 1998 to 2018, the bearing capacity of land resources of Guiyang gradually increased from 0.1809 in 1998 to 0.8908 in 2018, with an average annual growth of 0.0338 and the state of crisis was transformed into a state of prosperity. The contribution degree of each subsystem to the land resources carrying capacity of Guiyang was different, and the contribution of different subsystems was different in diverse time periods. Before 2005, the main contribution was from cultivated land bearing capacity, and after 2005 the social-economic carrying capacity and ecological carrying capacity became dominant. The green rate, the number of employed population and the investment density of fixed assets in urban built-up areas were the direct obstacle factors of the land resources carrying capacity of Guiyang, and the per capita grain output, per capita water resources and population density were the potential obstacle factors. In the future decade, the land resources carrying capacity of Guiyang will continue to increase and become rich. The research provides a scientific basis for the construction and protection of ecological environment, the sustainable development of social economy and the spatial planning of land resources in Guiyang.

Key words: carrying capacity of land resources, entropy weight method, subsystems, obstacle model, grey prediction model, Guiyang City

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