摘要
以兰州市为例,运用PSR模型构建兰州市土地生态安全评价体系,选取了16个指标,并运用熵权法计算各项指标的权重,根据综合指数和评价标准划定兰州市土地生态安全等级。结果表明,2007—2016年兰州市土地生态安全综合指数呈波动式上升趋势,且波动幅度较小。2007—2010年安全等级处于临界安全的状态;2011年安全等级变为较不安全的状态;2012—2015年安全等级处于临界安全的状态;经过生态系统的自我调节和社会的不断努力,2016年安全等级变为较安全的状态。因此,为了保证兰州市社会经济能够在稳定的土地生态环境中继续发展,这就要求在未来的发展中解决土地生态压力与土地生态安全之间的矛盾,切实改善兰州市的土地生态安全状态。
Taking Lanzhou city as an example,the land ecological safety evaluation system of Lanzhou city is constructed by using PSR model.Selecting 16 indexes,and the weight of each index is calculated by using entropy method,and the evaluation level of Lan⁃zhou land ecological safety is delimited according to the comprehensive index.The results show that the comprehensive index of land ecological security in Lanzhou city shows a fluctuating upward trend from 2007 to 2016,with a small fluctuation.From 2007 to 2010,the safety level is in the critical safety state.In 2011,the safety level became less safe.2012—2015 safety level is in critical safety state;Through the self-regulation of the ecosystem and the continuous efforts of the society,the security level became relatively safe in 2016.Therefore,in order to ensure that the social economy of Lanzhou can continue to develop in a stable ecological environment,it is necessary to resolve the contradiction between land ecological pressure and land ecological security in the future development,and effectively improve the land ecological security situation in Lanzhou city.
作者
马婷
邵战林
MA Ting;SHAO Zhan-lin(School of Management,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《湖北农业科学》
2021年第20期67-71,86,共6页
Hubei Agricultural Sciences
关键词
土地生态安全
PSR模型
熵权法
兰州市
land ecological security
PSR model
entropy weight method
Lanzhou city
