基于耦合协调度模型量化耕地自然质量与立地条件协同关系

耕地自然质量条件与立地系统共同决定了耕地可持续的生产能力,测算二者之间的协同比例关系可为耕地资源的保护分区提供理论和方法借鉴。该文以辽宁省不同地貌区为例,通过构建不同地貌区耕地自然质量评价系统与耕地立地条件评价系统,运用耦合协调度模型量化分析二者之间的协同关系,最后依据二者之间协同关系特征建立耕地资源保护分区。研究结果表明:在辽宁省西部的丘陵地貌区、中部的平原地貌区以及东部的山地地貌区,耕地资源保护优势条件特征存在区域差异,3个地貌区耕地自然质量条件与立地条件协同关系比值分别为4:6、6:4和5:5,应遵循耕地资源条件的地域差异特征实行协同保护。在此基础上,依据耕地资源优势条件特征将辽宁省耕地区域划分为核心保护区、优势整治区以及重点调控区,并提出不同区域耕地资源差异化的利用和保护措施。该研究结果体现了不同地貌区耕地资源优势保护条件特征的差异性与规律性,可为省域尺度耕地资源的永续利用提供参考借鉴。

Quantification of synergetic relationship between natural quality and site conditions of cultivated land based on coupling coordination degree model

Abstract: The natural quality conditions and site conditions of cultivated land jointly determined the sustainable production capacity of cultivated land. The research on the synergistic relationship between natural quality and site conditions could provide theoretical and methodological references for the scientific protection and sustainable use of cultivated land resources. This paper took the cultivated land resources of different geomorphological areas in Liaoning Province as the research objects, which were the hilly area in the west, plain area in the center and mountain area in the east of Liaoning Province. From the perspective of ensuring grain production capacity and sustainable utilization, this paper established natural quality and site condition evaluation system suitable for the characteristics of cultivated land resources in different geomorphological areas. Based on the coupling coordination degree model, this paper quantified the coordination relationship between the natural quality and the site conditions of cultivated land resources, and established synergy system of natural quality and site condition suitable for the characteristics of cultivated land resources in different geomorphic regions based on the LESA (land evaluation and site assessment) system model. In order to verify the scientificity and practicality of the cultivated land synergy system in different geomorphological areas, this paper used Kriging interpolation method to conduct an empirical analysis. Grading the evaluation results according to the natural breakpoint method, and based on the natural quality of farmland and the site property, this paper studied the arable land resources of Liaoning Province and revealed the regularity and difference of farmland resource protection in different landforms. Result shows: The natural quality of cultivated land resources covered the conditions such as soil and topography, and the site conditions of cultivated land resources covered the use condition, regional condition, and ecological and environmental conditions. The order of the natural quality conditions of cultivated land in different landform areas was plain area in the center > hilly area in the west > mountain area in the east. The order of the environmental conditions of cultivated land in different landform areas was hilly area in the west > mountain area in the east > plain area in the center. There were regional differences in the superior characteristics of cultivated land resource protection. The synergistic relationship between the natural quality and the site conditions of cultivated land is 4:6, 6:4 and 5:5, respectively, for the hilly area in the west, plain area in the center and mountain area in the east. According to the proportional coefficient, based on the LESA system, 3 comprehensive evaluation systems for the natural quality and site conditions of cultivated land were constructed conforming to the differences of different landforms. Through the empirical analysis of the collaborative system of natural quality and site environmental conditions of cultivated land in different landforms, the cultivated land of Liaoning was divided into core protection zone, dominant remediation zone and key regulation zone based on the natural quality conditions of the cultivated land, site conditions, and comprehensive quality scores. In the future construction and rectification process, and differentiated management should be implemented. The research results reflect the differences and regularity of the superior characteristics of cultivated land resources in different geomorphological areas, which can provide reference for the sustainable use of cultivated land resources at the provincial scale.