ABSTRACT

Assessing the temporal and spatial characteristics of cultivated land fragmentation is necessary to identify management practices that can reduce negative environmental effects. Thus, the purpose of this study was to use principal component analysis and spatial autocorrelation to analyze the dynamic characteristics of cultivated land fragmentation in different landform areas in Liaoning Province, China, in terms of time and space. An additional objective was to match the changes with the natural and social environment to support the sustainable development of fragmented cultivated land. The results indicated that the evolutionary trends of cultivated land fragmentation in the central plain area showed a weakening trend, contrary to those observed in the western hilly and eastern mountainous areas. Moreover, the spatial distribution characteristics of cultivated land fragmentation in the western hilly area were generally “external low, internal high,” primarily because of the edge density of cultivated land patches. The spatial distribution characteristics of cultivated land fragmentation in the central plain area were generally “external high, internal low,” primarily because of the number and division of cultivated land patches. The spatial distribution characteristics of cultivated land fragmentation in the eastern mountainous area were generally “south low, north high” because of the division of cultivated land patches. These results can provide guidelines for planners, managers, decision-makers and others to formulate regulatory policies, identify land remediation areas, and promote the sustainable development of cultivated land.

摘要

必须评估耕地破碎化的时间和空间特征，以识别可以减少负面环境影响的管理实践。因此，本研究的目的是利用主成分分析和空间自相关来分析辽宁省不同地形区域耕地破碎化的时空动态特征。另一个目标是使变化与自然和社会环境相适应，以支持零散的耕地的可持续发展。结果表明，中西部平原地区耕地破碎化的演变趋势呈减弱趋势，与西部丘陵和东部山区相反。此外，西部丘陵地区耕地破碎化的空间分布特征一般为“外部低，内部高”，这主要是由于耕地斑块的边缘密度所致。中部平原地区耕地破碎化的空间分布特征通常是“外部高，内部低”，这主要是由于耕地斑块的数量和划分。由于耕地斑块的划分，东部山区耕地破碎化的空间分布特征一般为“南低北高”。这些结果可以为规划者，管理者，决策者和其他人提供指导方针，以制定监管政策，确定土地整治区并促进耕地的可持续发展。