干旱区研究 ›› 2022, Vol. 39 ›› Issue (3): 955-967.doi: 10.13866/j.azr.2022.03.29

• 土壤与生态 • 上一篇    下一篇

近25 a来甘肃省耕地资源时空变化及其影响因子

侯青青1(),陈英1,2(),裴婷婷2,吉珍霞3,谢保鹏2   

  1. 1.甘肃农业大学草业学院,甘肃 兰州 730070
    2.甘肃农业大学管理学院,甘肃 兰州 730070
    3.甘肃农业大学资源与环境学院,甘肃 兰州 730070
  • 收稿日期:2021-10-09 修回日期:2022-01-18 出版日期:2022-05-15 发布日期:2022-05-30
  • 通讯作者: 陈英
  • 作者简介:侯青青(1996-),女,博士研究生,主要从事生态遥感研究. E-mail: 1307243647@qq.com
  • 基金资助:
    甘肃省高等学校科研项目(2018A-037);甘肃省高等学校科研项目(2018A-38);甘肃省高等学校科研项目(2019A-046);甘肃省高校创新基金项目(2020B-117);甘肃农业大学公招博士科研启动基金(GAU-KYQD-2017-35)

Analysis of cultivated land’s spatio-temporal changes and influencing factors in Gansu Province in recent 25 years

HOU Qingqing1(),CHEN Ying1,2(),PEI Tingting2,JI Zhenxia3,XIE Baopeng2   

  1. 1. College of Pratacultural Science, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    2. College of Management, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    3. College of Resources and Environment, Gansu Agricultural University, Lanzhou 730070, Gansu, China
  • Received:2021-10-09 Revised:2022-01-18 Online:2022-05-15 Published:2022-05-30
  • Contact: Ying CHEN

摘要:

研究耕地资源时空变化及驱动因子,对于提高区域粮食安全,严守耕地保护红线,制定耕地保护政策和措施具有重要的实践意义。以甘肃省1995年、2005年、2015年和2020年4期土地利用数据为基础,在ArcGIS和GeoDa等技术的支持下,从栅格、格网和县域尺度全面分析了甘肃省近25 a耕地时空变化特征,并利用地理探测器对引起耕地变化的主要驱动因子进行了探测。结果表明:(1) 甘肃省1995—2020年间耕地减少幅度达1.6%,1995—2005年耕地面积增加,2005—2020年耕地面积递减,且耕地主要流向草地、林地和建设用地,而未利用地主要向耕地和草地转移。(2) 耕地空间分布呈“东南多、西北少”的典型特征。耕地空间分布受自然因素和社会经济因素的共同作用,其中,人口和土地开发强度的交互作用是1995年、2005年和2015年甘肃省耕地空间分布差异性的主要原因,而2020年温度和降水的交互作用成为影响耕地的主导因素。研究结果可为甘肃省耕地保护管理提供科学依据。

关键词: 土地利用, 耕地, 时空演变, 驱动因子, 甘肃省

Abstract:

Studying the temporal and spatial changes and driving factors of cultivated land resources have important practical significance for improving regional food security, strictly cultivated land protection red lines, and formulating cultivated land protection policies and measures. Based on the land use data of Gansu Province in 1995, 2005, 2015, and 2020, with the support of ArcGIS and GeoDa. This paper comprehensively analyzed the temporal and spatial evolution characteristics of cultivated land resources in Gansu Province in the recent 25 years from the grid, reseau, and county scale using geographic detectors to detect the main driving factors causing cultivated land changes. The results showed that (1) the cultivated land in Gansu Province was 1.6% from 1995 to 2020, increasing from 1995 to 2005 and decreasing from 2005 to 2020. The cultivated land mainly flowed to grassland, forest, and construction land, while the unused land mainly moved to cultivated land and grassland. (2) The spatial distribution of cultivated land showed the typical characteristics of “more in the southeast and less in the northwest.” (3) The spatial distribution of cultivated land was influenced by the interaction of natural and socio-economic factors. The interaction between population and land development intensity was the main reason for the difference in the spatial distribution of cultivated land in Gansu Province in 1995, 2005, and 2015. However, the interaction between temperature and precipitation has become the dominant factor affecting cultivated land in 2020. Findings from this study can serve as a scientific basis for the protection and management of cultivated land in Gansu Province.

Key words: land use, cultivated land, spatio-temporal evolution, driving factors, Gansu Province