| Spatio\|temporal patterns and factors influencing farmland abandonment in autumn in Western Guanzhong during the last 20 years |
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| DOI：10.7606/j.issn.1000-7601.2023.03.29 |
| Key Words: farmland abandoned in autumn spatio\|temporal pattern Landsat images influencing factors western Guanzhong |
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| Abstract: |
| In recent years, the abandonment of arable land after the harvest of winter wheat in the central and western regions of China (abbreviated as autumn abandonment) has become increasingly serious. Taking Fengxiang, Qishan and Fufeng counties as examples, this study selected one Landsat image in spring and autumn for nine years during 2000-2020 and used CART decision tree classification method to extract the temporal and spatial variation characteristics of cultivated land abandonment in autumn for selected nine years. A field questionnaire survey was conducted to explore its influencing factors and driving mechanisms. The results showed that the autumn cultivated land abandonment in the study area was mainly distributed in the southwest of Fengxiang County, the central part of Qishan County, and the area near the mountains in the north of the three counties. Since 2000, the fall abandonment of cultivated land in the study area had shown a fluctuating upward trend. The abandoned area gradually increased during 2000-2007, declined during 2007-2013, and rose rapidly during 2013-2020. In 2020, the area of abandonment was the widest, and the abandonment rate reached 64.64%. In the past 20 years, the autumn abandoned plots in the study area had gradually changed from a small\|scale sporadic distribution to a large\|scale concentrated distribution. Irrigation conditions were the main factors influencing autumn cultivated land abandonment in the study area, and the degree of influence increased year by year. Economic location, farming radius and traffic conditions also had a certain influence on the abandonment rate, but the degree of influence decreased year by year. The marginalization of arable land was the fundamental reason why farmers chose autumn abandonment in the study area. The shortage of labor was the main reason for abandonment in autumn in the study area. The lack of irrigation, insufficient accumulated temperature, and fragmentation of cultivated land were the direct causes of autumn abandonment in the study area. |
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