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Evaluating the Dynamic Response of Cultivated Land Expansion and Fallow Urgency in Arid Regions Using Remote Sensing and Multi-Source Data Fusion Methods

Author

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  • Liqiang Shen

    (School of Science, Shihezi University, Shihezi 832000, China)

  • Zexian Li

    (School of Science, Shihezi University, Shihezi 832000, China)

  • Jiaxin Hao

    (School of Science, Shihezi University, Shihezi 832000, China)

  • Lei Wang

    (School of Mathematical Sciences, Dalian University of Technology, Dalian 116000, China)

  • Huanhuan Chen

    (School of Science, Shihezi University, Shihezi 832000, China
    Xinjiang Production and Construction Corps Key Laboratory of Oasis Town and Mountain-Basin System Ecology, Shihezi 832000, China)

  • Yuejian Wang

    (School of Science, Shihezi University, Shihezi 832000, China
    Xinjiang Production and Construction Corps Key Laboratory of Oasis Town and Mountain-Basin System Ecology, Shihezi 832000, China)

  • Baofei Xia

    (School of Science, Shihezi University, Shihezi 832000, China)

Abstract

In order to cope with the ecological pressure caused by the uncontrolled expansion of cultivated land in arid areas and ensure regional food security, the implementation of a cultivated land fallowing system has become an effective way to restore the ecology, alleviate the pressure on cultivated land, and increase productivity. In view of this, this paper takes the Tarim River Basin, located in the arid zone of China’s agricultural continent, as the research object. Using a land use transfer matrix and a gravity center migration model, the paper analyzes the spatiotemporal characteristics of cultivated land expansion in the Tarim River Basin from 2000 to 2020. Through remote sensing and the integration of multi-source data, the paper constructs an arable land fallow urgency index (SILF) from multiple dimensions such as human activity intensity, ecological vulnerability, output value, water resources status, and terrain conditions. The research results show that (1) cultivated land in the Tarim River Basin expanded by 15,665.133 km 2 in general, which is manifested by spreading around based on existing cultivated land, mainly from the conversion of grassland and unused land; the center of gravity of cultivated land moved 37.833 km to the northeast and 7.257 km to the southwest first. (2) The area of not urgently fallow (NUF) in the watershed showed an overall downward trend, decreasing by 10%, while the area of very urgently fallow (VUF) increased by 16%. VUF is mainly distributed in the marginal areas of cultivated land close to the desert and is gradually expanding into the interior of cultivated land. (3) The overall ecological environment of cultivated land in the watershed is showing a deteriorating trend, and the deterioration is gradually spreading from the edge of the cultivated land to the interior. (4) There are significant differences in the SILF values of different land use types after conversion to cultivated land. The urgency of fallowing cultivated land converted from unused land is the highest, followed by grassland, forest land, water bodies, and construction land. The expanded cultivated land has a higher SILF value than the original cultivated land. The research results can provide insights into regional land resource management, the formulation of cultivated land protection policies, and the ecological restoration of cultivated land.

Suggested Citation

  • Liqiang Shen & Zexian Li & Jiaxin Hao & Lei Wang & Huanhuan Chen & Yuejian Wang & Baofei Xia, 2025. "Evaluating the Dynamic Response of Cultivated Land Expansion and Fallow Urgency in Arid Regions Using Remote Sensing and Multi-Source Data Fusion Methods," Agriculture, MDPI, vol. 15(8), pages 1-27, April.
    • Handle: RePEc:gam:jagris:v:15:y:2025:i:8:p:839-:d:1633820
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    References listed on IDEAS

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