Arid Zone Research ›› 2022, Vol. 39 ›› Issue (3): 955-967.doi: 10.13866/j.azr.2022.03.29

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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 E-mail:1307243647@qq.com;cheny@gsau.edu.cn

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