横断山区凉山州耕地景观安全格局演变及驱动力分析  

Analysis on the evolution and dynamic degree of cultivated land landscape safety pattern in Hengduan Mountain area of Liangshan Prefecture

作　　者：张丽芳 冉丹阳 杨存建[1,2] 廖雨 祝聪 张英 ZHANG Lifang;RAN Danyang;YANG Cunjian;LIAO Yu;ZHU Cong;ZHANG Ying(The Institute of Geography and Resources Science,Sichuan Normal University,Chengdu 610068,China;Key Lab of Land Resources Evaluation and Monitoring in Southwest,Ministry of Education,Sichuan Normal University,Chengdu 610068,China)

机构地区：[1]四川师范大学地理与资源科学学院,成都610068 [2]四川师范大学西南土地资源评价与监测教育部重点实验室,成都610068

出　　处：《生态科学》2020年第2期25-31,共7页Ecological Science

基　　金：国家自然科学基金(40771144);国家973项目(2015CB452706)。

摘　　要：针对横断山区凉山彝族自治州1995年-2015年的耕地安全评价与演变等问题,采用耕地安全评价模型、土地动态度方法和地理探测器模型法,对其进行时空格局演变与驱动力分析。结果表明:(1)1995年-2015年凉山州耕地斑块呈现破碎化状态,脆弱度呈现先增加后降低的发展趋势;(2)与1995年-2005年相比,2005年-2015年凉山州的耕地安全等级呈明显下降趋势,低安全水平主要分布在西昌市及其周边县区;(3)耕地动态变化度主要受第一产值、有效灌溉面积、化肥使用量、耕地安全指数、人口密度等5个因子的影响。该研究结果可为凉山彝族自治州的耕地整理与利用提供科学的参考,并对横断山的其他区域的耕地可持续发展提供借鉴意义。Aiming at the problems of cultivated land safety assessment and evolution in Liangshan Yi Autonomous Prefecture from 1995 to 2015 in Hengduan Mountain area,the spatial-temporal pattern evolution and driving force analysis were carried out by using cultivated land safety evaluation model,land dynamic attitude method and geographical detector model.The results showed that:(1)the patch of cultivated land in Liangshan Prefecture was broken from 1995 to 2015,and the vulnerability increased first and then decreased.(2)Compared with 1995-2005,the cultivated land safety level of Liangshan Prefecture in 2005-2015 showed an obvious downward trend,and the low safety level mainly distributed in Xichang City and its surrounding counties.(3)The dynamic change degree of cultivated land was mainly influenced by five factors,such as the first output value,effective irrigated area,fertilizer use,cultivated land safety index,population density and so on.The results can provide scientific reference for cultivated land arrangement and utilization in Liangshan Yi Autonomous Prefecture and for sustainable development of cultivated land in other areas of Hengduanshan Mountain.

关 键 词：耕地 景观安全格局 时空演变 驱动力分析 横断山区 

分 类 号：S157.2[农业科学—土壤学]