新郑市耕地生态安全动态预警研究

发布时间：2018-04-29 22:16

  本文选题：耕地生态安全 + 障碍度　； 参考：《水土保持研究》2017年01期

【摘要】：耕地生态安全预警对改善耕地生态安全水平,保障粮食安全具有重要的意义。以河南省粮食主产区新郑市为研究对象,基于压力、状态、响应(P-S-R)和生态、环境、经济、社会(E-E-E-S)框架模型,构建了耕地生态安全预警指标体系。引入变权理论确定指标权重,运用改进物元可拓模型确定新郑市2001—2010年耕地生态安全预警等级,并采用障碍度模型分析耕地生态安全障碍因子。结果表明:2001—2010年新郑市耕地生态安全水平总体呈现上升趋势,预警等级由Ⅲ级(预警)上升为Ⅳ级(较安全);2009—2010年预警等级虽处于较安全(Ⅳ级),但有下降趋势。制约新郑市耕地生态安全水平的主要障碍因子是地均化肥使用强度、耕地复种指数、人均粮食产量、城市化水平、耕地垦殖率、人口自然增长率、人均水资源量、地均地膜使用强度、第三产业占GDP比重、农业经济比重、未利用土地比重等,这些因子应是今后改善新郑市耕地生态安全的重点。
[Abstract]:Early warning of cultivated land ecological security plays an important role in improving the level of cultivated land ecological security and ensuring food security. Taking Xinzheng City, the main grain producing area of Henan Province, as the research object, based on pressure, state, response P-S-R) and the framework model of ecology, environment, economy and society, the early warning index system of ecological security of cultivated land was constructed. The variable weight theory is introduced to determine the index weight, the improved matter-element extension model is used to determine the ecological security of cultivated land in Xinzheng City from 2001 to 2010, and the obstacle degree model is used to analyze the obstacle factors of cultivated land ecological security. The results showed that the level of ecological security of cultivated land in Xinzheng city from 2001 to 2010 showed an upward trend, and the level of early warning increased from grade 鈪，

本文编号：1821806