山地旅游经济区耕地生态安全诊断及障碍度分析——以梵净山旅游经济区为例

Ecological Security Diagnosis and Obstacle Analysis of Cultivated Land in Mountain Tourism Economic Zone: Taking Fanjingshan Tourism Economic Zone as an Example

以梵净山旅游经济区为例,建立PSR耕地生态安全综合评价指标体系,对研究区域的生态安全进行评价,进而确定影响该区域耕地生态安全的障碍因素。研究结果表明:(1)从研究区域2006—2016年耕地生态安全综合指数走势看,该区域耕地生态安全总体处于改善上升的趋势;(2)研究区域的耕地生态安全综合评价指数从2006年的0.52提升到2016年的0.6315,年均增长率为1.1054%,耕地生态安全等级由临界安全转为较安全;(3)从分类指标看,梵净山旅游经济区压力指标呈下降趋势,从2006年的0.597下降到2016年的0.459,年均递减率为1.25%,说明人类活动对耕地生态系统的影响有所增强;(4)单位GDP占地量、人均耕地面积、单位耕地农药负荷、土地垦殖率、农民人均纯收入、水土流失程度、土地整治强度是阻碍研究区域生态安全的主要因素。

The comprehensive evaluation index system of cultivated land ecological security of PSR is established to evaluate the ecological security of Fanjingshan Tourism Economic Zone, so as to determine the obstacle factors in this area. The results show that： Firstly, from the trend of the comprehensive index from 2006 to 2016, the overall ecological security of cultivated land in this area tends to improve. Secondly, the comprehensive index rises to 0.6315 in 2016 from 0.52 in 2006, with an average annual growth rate of 1.1054%, which shows that the ecological security level of cultivated land in this area has been switched from critical safe to safer. Thirdly, according to the classification indicators, the pressure indicator in this area shows a downward trend, which declines to 0.459 in 2016 from 0.597 in 2006, with an average annual decline rate of 1.25%, indicating that the impact of human activities on cultivated land ecosystems becomes greater. Fourthly, land occupation per unit GDP, cultivated land per capita, pesticides load of per unit farmland, land Reclamation rate, per capita net income of farmers, degree of water and soil loss and intensity of land consolidation are the main obstacle factors of the cultivated land ecological security in the study area.