Spatiotemporal Distribution and Fragmentation Driving Mechanism in Paddy Fields and Dryland of Urban Agglomeration in the Middle Reaches of the Yangtze River
Author:
Li Dehua123,
Duo Linghua123,
Bao Chenhao123,
Zhang Xiaoping123,
Zou Zili123
Affiliation:
1. Key Laboratory of River Basin Ecological Processes and Information in Jiangxi Province, East China University of Technology, Nanchang 330013, China
2. School of Surveying and Geoinformation Engineering, East China University of Technology, Nanchang 330013, China
3. Key Laboratory of Mine Environmental Monitoring and Improving around Poyang Lake of Ministry of Natural Resources, East China University of Technology, Nanchang 330013, China
Abstract
The spatial-temporal distribution pattern of China’s cultivated land has changed dramatically from 1990 to 2020, and the problem of cultivated land fragmentation has become more prominent. However, the existing research lacks a focus on the two specific land use types, paddy fields and dryland. In this study, the spatiotemporal distribution pattern and the fragmentation driving mechanism of paddy field and dryland during the years 1990 to 2020 were identified by using the center of gravity center migration model, standard deviation ellipse, and land-use dynamic model for the urban agglomeration in the middle reaches of the Yangtze River as an example. The results show that there are significant differences in the spatiotemporal distribution characteristics of paddy field and dryland in the MRYRUA. Among the provinces and cities, Hubei province and its Xiangyang city showed the most obvious trend of change. The loss and gain of paddy fields and dryland is related to economic and policy contexts in each period. The main driving factor of paddy field and dryland fragmentation is natural condition, whereas a relatively important factor is the per capita disposable income of rural residents. The effects of each factor on paddy field and dryland fragmentation were not independent; any two factor interactions had a stronger effect on paddy field and dryland fragmentation than a single factor. In general, this study provides guidance and references for the main grain-producing areas undergoing rapid urbanization relating to cultivated land conservation, food security, and sustainable agricultural utilization.
Funder
Jiangxi Provincial Social Science Foundation Project
Humanities and social science research project of universities in Jiangxi Province
Open Fund of Key Laboratory of Mine Environmental Monitoring and Improving around Poyang Lake of the Ministry of Natural Resources
Key Laboratory for Digital Land and Resources of Jiangxi Province, East China University of Technology
Science and Technology Research Project of Jiangxi Provincial Department of Education
Doctoral Research Initiation fund of East China University of Technology
Jiangxi Provincial Natural Science Foundation Project
Subject
Nature and Landscape Conservation,Ecology,Global and Planetary Change
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