山东省耕地多功能耦合协调度时空格局分析

以山东省132个县区为研究单元,构建耕地多功能评价指标体系,评价各县区耕地多功能时空差异,并运用耦合协调度及空间自相关模型对耕地功能耦合作用的时空特征进行分析。研究表明,2005—2015年,山东省耕地各单项功能时空格局变化差异明显,综合功能持续增长,以中值水平为主,农业生产和社会保障功能对耕地综合功能增长有较强的推动作用,景观格局和生态环境功能影响相对较小;研究期间,耕地多功能耦合协调度由拮抗阶段向磨合阶段逐步提高,地域差异较为明显,农业发展重点地区耦合协调度水平高于经济发展重点区域;耕地多功能耦合协调度具有较高的空间聚集性,但空间相关性逐渐降低,显著H-H区与显著L-L区空间聚集性较强,显著L-H区与显著H-L区数量较少,且分布零散,无明显规律。本研究可为耕地区域差异化治理、促进耕地多功能协调发展、提升耕地综合功能提供参考。

Spatial-temporal Pattern Analysis of Cultivated Land Multi-functional Coupling Coordination Degree in Shandong Province

Taking 132 counties and districts in Shandong Province as the research units, the multi-function evaluation index system of cultivated land was established to evaluate the spatial-temporal differences of multi-function of cultivated land, and the spatial-temporal characteristics of the coupling effect of cultivated land function were analyzed by using coupling coordination degree model and the spatial autocorrelation model. The results showed that from 2005 to 2015, the spatial-temporal pattern changes of each single function of cultivated land in Shandong Province were obviously different, and the comprehensive function continued to grow, mainly at the median level. Agricultural production function and social security function had a strong role in promoting the growth of the comprehensive function of the cultivated land, while landscape pattern function and ecological environment function had relatively little impact on comprehensive function of the cultivated land. During the study period, the degree of multi-function coupling coordination of cultivated land was gradually increased from the antagonistic stage to the running-in stage with obvious regional differences. The level of coupling coordination degree in key areas of agricultural development was higher than that in key areas of economic development. The multi-function coupling coordination degree of cultivated land had high spatial aggregation, but the spatial correlation was gradually decreased. The significant H-H area and significant L-L area had strong aggregation, and the number of significant L-H area and significant H-L area was small and scattered with no obvious rule. The research results can provide basis for the regional differentiated management of cultivated land, the coordinated development of multi-functions of cultivated land, and the enhancement of the comprehensive functions of cultivated land.