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中国农学通报 ›› 2016, Vol. 32 ›› Issue (7): 118-126.doi: 10.11924/j.issn.1000-6850.casb15100026

所属专题: 耕地保护

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于能值理论的荥经县土地系统脆弱性分析

徐留兴,常毅   

  1. 四川师范大学,四川师范大学
  • 收稿日期:2015-10-10 修回日期:2016-01-25 接受日期:2015-12-07 出版日期:2016-03-18 发布日期:2016-03-18
  • 通讯作者: 常毅
  • 基金资助:
    四川省应用基础研究计划“四川省盆周山区土地系统脆弱性研究”(2013JY0138);四川省软科学研究计划“攀西地区创新驱动发展的实现路径研究”(2015ZR0006)。

Land System Vulnerability Analysis Based on Energy Theory:A Case Study of Yingjing County

  • Received:2015-10-10 Revised:2016-01-25 Accepted:2015-12-07 Online:2016-03-18 Published:2016-03-18

摘要: 土地系统脆弱性作为制定土地可持续发展政策的重要依据,已成为当前土地系统可持续发展研究的重要组成部分。应用能值分析方法,在对荥经县土地系统能值投入产出动态分析的基础上,对土地系统脆弱性状况进行分析,旨在为当地区域可持续发展寻求途径和对策。研究结果显示:(1)从1996—2011年,全县土地系统总能值投入从1.36E+21 sej增加到2.37E+21 sej,总能值产出从1.59E+21 sej增加到1.96E+21 sej;(2)土地能值密度、人均能值及环境负载率均呈现增长趋势;(3)能值投入产出比及可持续发展指数均有所下降。结果表明荥经县人民生活水平虽有所提高但土地系统所承受的环境压力却越来越大,其脆弱性在逐渐增强。

关键词: 光响应, 光响应, CO2响应, 净光合速率, 蒸腾速率, 水分利用效率

Abstract: Land system vulnerability is an important basis of making land system sustainable development policy. It has become the important part of sustainable development studying. Taking Yingjing as a case, the vulnerability was analyzed on the basis of analyzing the energy input-output by using the method of energy analysis. [Objective] The purpose is to seek suggestions and strategies for sustainable development. The results show that:①The total energy input increased from 1.36E 21sej to 2.37E 21sej, total energy output changed from 1.59E 21sej up to 1.96E 21sej; ②The land energy density, per-capital energy and environmental loading ration all have an upward trend; ③Energy input-output ration and sustainable index have a downward trend. [Conclusion] It indicated that people’s living standard of Yingjing has been improved but the environmental pressure and land system vulnerability has become more and more serious.