耕地景观破碎化成因及对农村收入影响分析

Assessment of determinants of cultivated land fragmentation and its impacts on rural income

为了定量分析耕地破碎化的驱动因素,评价其对农村收入水平的影响,该文基于景观指数分析法选取景观指标计算景观指数,使用熵权法计算贵州省遵义市播州区21个乡镇的耕地破碎化综合指数;利用地理加权回归模型,计算耕地破碎化综合指数与各环境因子间的相关性,同时分析耕地破碎化综合指数对农村年人均可支配收入的影响。实验结果显示,该区域耕地破碎化是各类环境因素综合作用的结果,农村收入水平与耕地破碎度呈负相关。由此可见,景观指数分析与地理加权回归分析相结合既能够较好地反映耕地破碎化程度,同时也能清晰地揭示耕地破碎化的驱动因素及其对农村收入水平的影响,有助于我们进一步理解耕地破碎化的内涵,为提升农村收入水平提供理论参考。

In order to quantitatively analyze the driving factors of cultivated land fragmentation,evaluate its impact on rural income,taking Bozhou District of Zunyi City,Guizhou Province as the research area,based on landscape index analysis method,this paper selected landscape indicators to calculate landscape metrics,by which the comprehensive index of cultivated land fragmentation in 21 towns of Bozhou District are calculated through entropy weight method. Potential driving factors were selected and geographically-weighted regression model was used to explore the causes of local cultivated land fragmentation and its impact on rural per capita disposable income. Results showed that the fragmentation of cultivated land in this area was the result of combination of various factors and rural income was negatively correlated with the fragmentation of cultivated land. To draw a conclusion,the combination of landscape index analysis and geographically weighted regression analysis could better reflect the degree of cultivated land fragmentation and its correlation with various environmental factors and rural income,which would help us better understand the connotation of rural cultivated land fragmentation and provided a theoretical reference for improving the income of rural areas.