基于GIS技术的农用地等级评价方法研究

Evaluation of Farmland Grade Based on GIS Technology

研究利用GIS技术,结合传统农用地等级评价方法,提出基于GIS技术的县域农用地等级评价方法。针对昭阳区农用地资源现状,综合分析影响农用地等级的各种因素,利用土壤图、土地利用现状图及行政区划图叠置划分法确定评价单元,选取土壤管理、立地条件、剖面与耕层理化性状、耕层养分状况、气候等5个方面16个评价因子,建立农用地等级评价体系及模型。重点对利用层次分析法(AHP)、模糊评价法建立农用地等级评价体系及其评价模型进行了论述,并最终通过综合指数法评价得到农用地等级。

The aim of this paper is to study how to tion of GIS technology with traditional methods of evaluate farmland productivity through the combinaevaluating soil productivity. An evaluation method based on GIS is then put forward. Based on the actuality of the farmland resources in Zhaoyang County and all possible factors influencing farmland productivity, then confirmed the evaluation unit by the method of overlapping soil distribution map, land utilization map and administrative division map, then selected 16 factors from five aspects as land management, land growing situation, physical and chemical characteristics of the top soil, soil nutrient condition, climate, established the evaluation system and evaluation model of land productivity. The discussion is made mainly on how to establish the farmland productivity evaluation systems and models using analytical hierarchy process （AHP）, Fuzzy evaluation. By adopting the method of integrated indexes, the level of farmland was established.