论文部分内容阅读
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。
Taking Liaoning Province as an example, the spatial distribution of farmland quality and its influencing factors were studied by using GIS, geostatistics, landscape ecology and canonical correlation analysis. The results showed that: (1) The natural, economical and utilization qualities of agricultural land were the highest in the central plains. In the whole province, the difference gradually decreases from the central area to the outside. The spatial distribution of natural and economic quality shows a moderate correlation, and the use of quality shows a pure gold effect. (2) Indices of diversification and concentration showed that the quality of natural resources in western Liaoning was quite different and was the most affected by anthropogenic factors. The quality of central plain was more complete and the land use was higher and diversified. Liaodong mountainous hilly areas and the central plains quality of agricultural land advantage than Liaoxi hilly area obvious. (3) Canonical correlation analysis of agricultural land quality factors shows that the quality of agricultural land in Liaoning Province is mainly affected by human activities such as production labor and economic input, as well as the influence of soil active soil thickness, topography gradient, irrigation guarantee rate, surface rock outcrop, pH , Surface soil texture and organic matter content and other natural factors.