Ao Yong,Zhang Yiheng,Wang Xiaofeng,et al.Spatiotemporal Changes and Driving Factors of Cultivated Land Fragmentation in Guanzhong Region Based on Landscape Index[J].Research of Soil and Water Conservation,2024,31(03):401-411.[doi:10.13869/j.cnki.rswc.2024.03.039]
基于景观指数的关中地区耕地细碎化程度的时空变迁及其驱动因素
- Title:
- Spatiotemporal Changes and Driving Factors of Cultivated Land Fragmentation in Guanzhong Region Based on Landscape Index
- 文章编号:
- 1005-3409(2024)03-0401-11
- Keywords:
- cultivated land fragmentation; temporal and spatial changes; geographic detector; landscape pattern index; Guanzhong area
- 分类号:
- F301.21
- 文献标志码:
- A
- 摘要:
- [目的]优化陕西耕地细碎化治理,协调粮食需求增长与环境约束之间的矛盾,维护地区粮食安全和促进农业现代化发展。[方法]以关中地区为研究区,以土地利用数据和其他自然经济数据为基础,运用洛伦兹曲线、变异系数法、景观指数、空间自相关等方法构建耕地细碎化评价模型以探索关中地区耕地细碎化(Cultivated Land Fragmentation,简称CLF)的时空变迁,并利用地理探测器对区内CLF进行了驱动力分析。[结果](1)关中地区耕地资源空间分布相对均衡,耕地专业化程度保持较高水平。(2)关中地区的CLF程度变化时空差异显著,CLF程度整体呈现下降态势,但部分地区CLF程度呈增减并存趋势,整体呈现东低西高的态势。(3)关中地区CLF时空分化受多种因素影响,社会经济因素的综合影响明显强于自然因素,其中海拔高度、人口密度、人均耕地面积和地区总产值GDP为主要影响因素; 因子间的交互作用效应强于单因子,以双因子增强和非线性增强为主。[结论]关中地区耕地细碎化问题在20年间得到了一定程度的改善,但呈现出较大的地区差异,应进一步在社会经济因素方面对耕地细碎化现象加强综合治理,以推动关中地区农业机械化、现代化发展。
- Abstract:
- [Objective] The aims of this study are to optimize the fine management of cultivated land in Shaanxi Province, to coordinate the contradiction between food demand growth and environmental constraints, to maintain regional food security, and to promote agricultural modernization. [Methods] The Guanzhong area was taken as the research area. Based on land use data and other natural economic data, Lorentz curve, coefficient of variation method, landscape index, spatial autocorrelation and other methods were used to construct an evaluation model of cultivated land fragmentation to explore the temporal and spatial changes of cultivated land fragmentation(CLF)in Guanzhong area, and geographic detectors were used to analyze the driving force of CLF in the area. [Results](1)The spatial distribution of cultivated land resources in Guanzhong area was relatively balanced, and the degree of cultivated land specialization remained at a high level.(2)The spatial and temporal differences in the degree of CLF in Guanzhong region were significant, and the overall degree of CLF showed a downward trend, but the degree of CLF in some areas showed a trend of increasing and decreasing, and the overall trend was low in the east and high in the west.(3)The spatiotemporal differentiation of CLF in Guanzhong region was affected by many factors, and the comprehensive influence of socio-economic factors was significantly stronger than that of natural factors, among which altitude, population density, per capita arable land area and regional GDP were the main influencing factors. The interaction effect between factors was stronger than that of single factor, and two-factor enhancement and nonlinear enhancement were the mainstay. [Conclusion] The problem of cultivated land fragmentation in Guanzhong area has been improved to a certain extent in the past 20 years, but there are large regional differences, and the comprehensive management of cultivated land fragmentation should be further strengthened in terms of social and economic factors, so as to promote the development of agricultural mechanization and modernization in Guanzhong area.
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备注/Memo
收稿日期:2023-06-02 修回日期:2023-06-15
资助项目:陕西省土地整治重点实验室开放基金“污染调查与评估研究污损土地遥感技术”(2018-JC08); 自然资源部退化及未利用土地整治工程重点实验室开放基金(SXDJ2019-03); 国家重点研发计划“国家生态屏障区生态系统动态演变特征”(2018YFC0507301-2)
第一作者:奥勇(1963—),男,陕西富平人,副教授,主要从事遥感科学与技术方面的研究。E-mail:aoyong@chd.edu.cn