摘要
以秦巴山区陕西省安康市汉阴县为例,在通过土壤调查采样和室内化验分析获得的相关耕地地力数据信息的基础上,运用层次分析、模糊评价等方法改进了灰色关联模型,实现了耕地地力综合评价的定量化和自动化。结果表明,该地区耕地基础地力可分为5级,其中Ⅰ级地占耕地总面积的7.32%,Ⅱ级地占耕地总面积的15.41%,Ⅲ级地占耕地总面积的21.61%,Ⅳ级地占32.47%,Ⅴ级地占23.18%;研究区内耕地地力属中等偏差水平,其中河谷阶地的耕地地力水平状况相对较好,低山丘陵区的耕地地力水平相对较差,中低山的耕地地力水平最差。
Chosen Hanyin County of Shaanxi Province as the study area,this research intended to assess the quantitative methods of farmland productivity evaluation.On the basis of field investigations,sampling and chemical analysis,the automatic and quantitative evaluation procedure was realized by adopting the modified grey relation model,which was improved with incorporation of analytics hierarchy process and fuzzy math.The proposed evaluation method is of positive significance in scientifically managing and utilizing the cultivated land resources in China.The results show that farmland productivity in the study area could be classified into five grades,with grade Ⅰ accounting for 7.32% of the total area,grade Ⅱ for 15.41%,grade Ⅲ for 21.61%,grade Ⅳ for 32.47%,and grade Ⅴ for 32.47%,respectively.The results also indicate that the farmland productivity in the study area ranged from inferior to intermediate;the farmlands of the river valleys have relatively high productivity,the farmlands of the rolling-hill areas have low productivity,and the farmlands of mountainous areas have the lowest.
出处
《水土保持通报》
CSCD
北大核心
2012年第2期122-126,131,共6页
Bulletin of Soil and Water Conservation
基金
国家重点基础研究(973)发展计划项目"区域水土流失过程与趋势分析"(2007CB407203)
国家自然科学基金项目(30872073)
国家科技基础性专项重点项目"秦巴山区生态群落与生物种质资源调查"(2007FY110800-07)
关键词
秦巴山区
耕地地力
灰色系统
综合评价
Qinling-Bashan mountainous region
farmland productivity
grey system
comprehensive evaluation
