基于GIS的喀斯特地区耕地适宜性评价与可持续发展:以贵州省普安县石古河小流域为例  

Suitability Assessment and Sustainable Development of Arable Land in Karst Area Based on GIS:Taking small watershed of Shigu river in Pu'an county,Guizhou as an example

作　　者：袁晓冬[1] 安裕伦[2] 

机构地区：[1]贵州师范大学地理与环境科学学院,贵州贵阳550001 [2]贵州师范大学山地资源与环境遥感重点实验室,贵州贵阳550001

出　　处：《贵州农业科学》2011年第9期96-99,共4页Guizhou Agricultural Sciences

基　　金：贵州省科技攻关项目"喀斯特石漠化信息遥感定量提取技术研究"[黔科合GY字(2007)3017];贵州省科技攻关项目"基于中巴02B星的毕节地区生态建设与演化遥感示范研究"[黔科合GY字(2008)3022];贵州省重大专项"遥感数据库与空间信息网络共享平台试点研究"(黔科合重大专项字2006-6006-2)

摘　　要：为喀斯特地区耕地的开发和管理提供依据,以贵州省普安县石古河小流域为例,选择有机质含量、土壤质地、石漠化等级、土层厚度、坡度、坡向、灌溉条件、降水量和海拔等指标为参评因子,采用GIS与加权指数法结合的耕地适宜性评价模型,对该研究区的耕地适宜性与可持续发展进行了评价和研究。结果表明:区域内高度适宜耕地283.55hm2,占耕地面积的24.60%;边际适宜耕地和不适宜耕地占耕地面积的50.07%。耕地质量差,数量少,多表现为有机质含量低,坡度大,土层薄,裸岩比例高,土壤侵蚀重。The indexes of soil organic content,soil texture,stony desertification degree,soil thickness,gradient,slope aspect,irrigation condition,precipitation and elevation of arable land were analyzed to establish the evaluation model of arable land suitability by using GIS and weighted index method for suitability evaluation and sustainable development of arable land in small watershed of Shigu river,Pu＇an county,Guizhou and to provide the scientific basis for development and management of arable land in Karst areas.The results showed that the area of highly suitable land in the area was 283.55 hm2,accounting for 24.60%,while the area of marginally suitable land and unsuitable cultivation accounted for 50.07% of total arable land area.The feature of low organic matter content,steep slope,thin soil thickness,high bare rock proportion and heavy soil erosion causes poor quality and less amount of arable land in small watershed of Shigu river,Pu＇an county,Guizhou.

关 键 词：耕地 适宜性评价 GIS 加权指数法 普安县石古河小流域 贵州 

分 类 号：S159[农业科学—土壤学] F293.2[农业科学—农业基础科学]