摘要
以辽宁省为例,运用GIS技术、地统计学、景观生态学和典型相关分析方法相结合研究农用地质量空间分布及影响因素。结果表明:(1)农用地的自然、经济和利用质量等别均为中部平原区最高。在全省,其等别由中心区域向外部逐渐递减,自然质量和经济质量的空间分布均呈中等相关,利用质量表现出纯块金效应。(2)各质量等指数多样化和集中性分析表明,辽西地区自然质量等别多,受人为影响因素最强;中部平原地区自然质量等别较齐全,土地利用率高且多样化。辽东山地丘陵区和中部平原区各质量农用地区位优势较辽西低山丘陵区明显。(3)农用地质量影响因素典型相关分析表明,辽宁省农用地质量主要受生产劳动、经济投入等人类活动的影响和土壤有效土层厚度、地形坡度、灌溉保证率、地表岩石露头度、pH、表层土壤质地和有机质含量等自然因素的限制。
Taken Liaoning Province as an example,the spatial distribution pattern of farmland resources quality and factors was studied by combined the methods of GIS,geostatistics analysis,landscape ecology and canonical correlation analysis.The results showed that the physical quality,utilization quality and economic quality were all the highest in the central plain region,and the distribution in the whole province had gradually reduced from the central region to the external region.The spatial distribution of physical quality and economic quality were medium-related,but utilization quality performance out of a pure nugget effect.Analysis of diversification and concentration showed that the grade of natural was most in western hilly regions,which more affected by the man-made factors strongly.The natural quality of the central plains region was more complete than that in other regions,and it had high utilization and diversification.Agricultural land locational advantages in the eastern hilly region and the central plain region were significantly higher than western hilly regions.Canonical correlation analysis showed that the quality of agricultural land in eastern hilly regions was affect by land use,economic investment and natural factors.The quality of agricultural land in western regions is mainly affected by human activities and soil layer thickness,irrigation assurance rate,slope and other natural factors.In the central plain area,in addition to the above factors the pH and irrigation has no influence to the agriculture land quality.
出处
《土壤通报》
CAS
CSCD
北大核心
2011年第2期273-279,共7页
Chinese Journal of Soil Science
基金
辽宁省国土资源厅课题"辽宁省农用地分等研究"资助
关键词
辽宁省
农用地质量
空间分布
地统计学
景观生态学
Liaoning province
Agricultural land resources quality
Spatial distribution
Geostatistics
Landscape Ecology