Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (4): 250-257.doi: 10.11924/j.issn.1000-6850.2014-2089

Special Issue: 资源与环境 农业生态 耕地保护

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The Dynamic Study of Land Ecological Security in Gelmud’s Basin

Ma Zhi’ang, Gai Aihong, Sun Linjun   

  1. (College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070)
  • Received:2014-07-31 Revised:2014-09-17 Accepted:2014-10-13 Online:2015-03-20 Published:2015-03-20

Abstract: In order to do the evaluation on ecological security of regional land, the land ecological security assessment index system was built by using the model of ‘pressure-state-response’, then the author used mean squared error to calculate the weight of the each indicator, and used the method of comprehensive index method to calculate the land ecological security situation of the basin of Gelmud at the year of 2000, 2005, 2010 which were classified into different grades. The findings showed that: the degree of land ecological security was on the rise in general. Land ecological security composite index rose from 0.3740 in 2000 to 0.5899 in 2010, basic close to good condition. And from 2000 to 2005, the index rise was quite gently, from 2005 to 2010, the index rise was forceful. The latter stage was the former 3 times.