长江流域资源与环境 >> 2012, Vol. 21 >> Issue (08): 1000-.

• 生态环境 • 上一篇    下一篇

基于GIS和生态位适宜度模型的园地适宜性评价——以湖北宜昌市夷陵区为例

聂 艳| 喻 婧| 崔 灿   

  1. (华中师范大学城市与环境科学学院|湖北 武汉 430079)
  • 出版日期:2012-08-20

RESEARCH ON SUITABILITY EVALUATION OF GARDEN LAND IN YILING DISTRICT BASED ON GIS AND NICHEFITNESS MODEL

NIE Yan| YU Jing| CUI Can   

  1. (College of Urban &|Environment Sciences,Huazhong Normal University,Wuhan 430079,China)
  • Online:2012-08-20

摘要:

生态位适宜度是对经典生态位理论和方法的深化与发展,在合理优化和发挥作物、环境最大共生效应,及农业结构调整和布局中具有重要的理论和实际意义。以宜昌市夷陵区园地为研究对象,将生态位适宜度模型引入到适宜性评价研究中,构建了5个因素12个因子的指标体系并提出了语言型、阈值型和空间型指标的量化方法,采用加权求和与限制因子模型对各评价单元柑橘的生态位适宜度值及限制因子进行了定量分析。结果表明:研究区生态位适宜度值整体较高,最大值达0.893,生境条件基本能满足柑橘的生长发育需求;园地适宜性评价结果以2级为主,所占面积达41.34%,1级地也达到21.58%;限制该地区园地生产潜力的生态因子主要为:土壤质地、冷月平均气温和道路通达度。同时,丰富了土宜评价的理论和方法体系,能直接指导农业生产实践、促进园地的合理开发利用与管理

Abstract:

The Nichefitness theory is a further development of the classical niche theory and an extension of the related methods.The nichefitness model developed on the basis of niche can reflect the fitness degree of crops to environmental conditions relatively well.It can also be utilized to analyze factors restricting the growth of crops.However,there is little work on suitability evaluation especially multisuitability evaluation on tillage by applying the nichefitness theory.Under the guidance of the theory of sustainable development for Chinese agriculture,this paper aimed to use nichefitness model to assess suitability degree and limiting factors of garden land in Yiling District of Hubei Province in China.Firstly,the index system of suitability evaluation was established including 5 subgoals and 12 indices.Then,in order to normalize the measured value,indicators were categorized into numerical type,linguistic type and spatial diffusion type according to their attributes.After constructing the suitability evaluation models,the degree of suitability for garden land was classified into 4 levels,where the nichefitness value ranged from 0372 to 0893 with a maximum of 0893;one level and two level were predominant portions with their areas accounting for 6292 percent of the total.Four level with lower suitability and quality accounted for 643 percent of the total.The soil texture,average temperature of the coldest month and accessibility of road were the primary limiting factors and important issues of agriculture management.The results can be used as a quantitative basis in evaluation of garden land quality and resolution of the land reasonable utilization in this region.On the other hand,the research can extended and deepened theory and methodology of traditional land suitability evaluation subject

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