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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (17): 186-189.doi: 10.11924/j.issn.1000-6850.2013-2377

所属专题： 资源与环境； 农业生态

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于RS和转移矩阵的区域生态风险强度指数测算——以庆阳市西峰区为例

孙林军 盖艾鸿   

  • 收稿日期:2013-09-06 修回日期:2013-10-11 出版日期:2014-06-14 发布日期:2014-06-14

Measuring of the Intensity of Regional Ecological Risk Index Based on RS and Transfer Matrix:Taking Xifeng District, Qingyang City as An Example

  • Received:2013-09-06 Revised:2013-10-11 Online:2014-06-14 Published:2014-06-14

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摘要： 为了反映庆阳市西峰区1990—2010年土地利用的生态风险的演变，最大限度地降低土地利用风险水平，笔者运用RS与GIS技术，引入生态风险强度指数与转移矩阵的方法，并用转移矩阵来反映土地生态风险的转换。结果表明：1990—2010年庆阳市西峰区林地的生态风险转向草地、建设用地、耕地、水域、未利用地的生态风险中，林地生态风险主要转向了耕地；草地、建设用地、未利用地的生态风险也分别主要转向了耕地；而耕地的生态风险主要转向未利用地；水域的生态风险主要转向草地。通过引入转移矩阵更加直观地反映出生态风险的流向，表现出各种土地类型之间生态风险的转换，为生态环境的保护提供依据。

关键词: 木薯, 木薯, 亚麻仁苷酶, 生氰糖苷, RT-PCR, 高氰

Abstract: In order to reflect the revolution of the ecological risk of land use from 1990 to 2000 in Xifeng District Qingyang City, maximum reduce the risk of land utilization level. The author used RS and GIS technology, introduced the method of ecological risk index and the transfer matrix, and used the transfer matrix to reflect the conversion of land ecological risk. The results showed that: from 1990 to 2010 the Xifeng District Qingyang City’s forest ecological risk to the ecological risks of grassland, construction land, cultivated land, water and unutilized land, the main of the transfer was forest to cultivated land; and the ecological risks of grassland, construction land, cultivated land also mainly to cultivated land, respectively. And the ecological risk of cultivated mainly to unutilized land; water’s mainly to grassland. By introducing a transfer matrix was more intuitive reflect the flow direction of the ecological risk, showed the ecological risk of conversion between various land types, providing the basis for the protection of the ecological environment.