首页 | 官方网站   微博 | 高级检索  
     

冲积平原区高程因子对土壤剖面质地构型的影响--以封丘县为例
引用本文:檀满枝,密术晓,李开丽,陈杰.冲积平原区高程因子对土壤剖面质地构型的影响--以封丘县为例[J].生态学报,2011,31(8):2060-2067.
作者姓名:檀满枝  密术晓  李开丽  陈杰
作者单位:1. 土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,南京,210008
2. 土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,南京,210008;中国科学院研究生院,北京,100049
3. 郑州大学水利与环境学院,郑州,450001
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目),中国科学院重大资助项目,中国科学院知识创新项目
摘    要:河流冲积平原区土壤剖面质地构型对土壤水肥保持、供给能力以及水盐运动产生极为重要的影响。区域土壤的六大成土因素中,地形的影响最为突出。分析土壤剖面质地构型的地形影响,对于指导农业生产具有重要的理论与现实意义。本研究应用模糊c-均值算法模型,基于土壤剖面特征质地层厚度数据,得到研究区9种土壤剖面质地构型。对比分析典型区和研究区土壤剖面质地构型的地形影响结果表明:隶属于土壤剖面质地构型砂-砂-砂的隶属度值与高程之间始终存在正相关,说明地形较高部位发育的土壤质地偏砂的规律性始终存在,而从典型区到研究区,其它土壤剖面质地构型、0-60cm土层质地类型、以及表土层、心土层和底土层质地类型受地形影响的规律性减弱。地形较低部位发育的土壤剖面质地构型相对复杂,而地形较高处,发育的土壤剖面质地构型相对简单。土壤剖面质地构型复杂的地区可能更多地受到人为因素的干扰,从而表现出受地形影响的规律性不明显。

关 键 词:封丘县、模糊c-均值、剖面质地构型、高程
收稿时间:3/26/2010 4:49:33 AM
修稿时间:1/13/2011 5:44:59 PM

Influence of elevation factor on soil profile texture configuration: a case study of the alluvial plain of Fengqiu County
TAN Manzhi,MI Shuxiao,LI Kaili and CHEN Jie.Influence of elevation factor on soil profile texture configuration: a case study of the alluvial plain of Fengqiu County[J].Acta Ecologica Sinica,2011,31(8):2060-2067.
Authors:TAN Manzhi  MI Shuxiao  LI Kaili and CHEN Jie
Affiliation:Institute of Soil Science, Chinese Academy of Sciences
Abstract:Profile texture configuration of the soil in alluvial plains is a crucial factor determining soil water and nutrient conserving and supplying capacity and water and salt movement in the soil. Among the six major soil-forming factors in this regional soil, topography stands out to be the most prominent one. Analysis of the influence of topography on soil profile texture configuration is of important theoretical and practical significance to guiding agricultural production. Using the fuzzy c-means algorithm model nine soil profiles different in texture configuration was defined. Based on the data of thicknesses of the characteristic texture layers of nine soil profiles including sandy, loamy and clayey, surface layers, (0-(30±10)cm), sandy, loamy and clayey center layers((30±10)cm-(60±10)cm)and sandy, loamy and clayey bottom layers((60±10)cm-(90±10)cm), nine types of soil profile texture configuration were identified, i.e. loam-clay-loam, loam-loam-clay, loam-clay-clay, clay-clay-clay, sand-sand-clay, sand-sand-sand, sand-loam-loam, loam-loam-sand and loam-loam-loam, among which loam-loam-loam and sand-sand-sand were the dominant types. As a result of frequent flooding by the Yellow River in history, complex process of sediment deposition, and in addition farming practices and soil amelioration measures, like irrigation, deep plowing and field leveling, soil profile texture configuration varied sharply in distribution at a small spatial scale. Comparison analysis of the influence of landform on soil texture profile configuration in the whole study area and the typical area relatively concentrated with various types of soil profile texture configuration, shows that a positive correlation always exists between membership value of the soil profile texture configuration of the sand-sand-sand type and elevation, suggesting that the law prevails that soils in lands relatively high in elevation tend to be sandy, while the influence of landform on soil profile texture configuration of other types, and soil texture of the 0-60cm soil layer, surface soil layer, subsoil layer and bottom soil layer, does not follow any specific law. The reason is probably that as the influence factor of soil profile texture configuration is relatively simple in the typical area than in the whole study area; elevation can be viewed as the main factor controlling spatial distribution of various types of soil profile texture configuration. Based on the definition of 0-60cm texture control layer, soil profile texture configurations with the same texture function layer or texture control layer were collated. It was found that the soils with a texture control layer of the sand-sand-loam type were generally distributed in areas on average over 70m in elevation, while the soils with a texture control layer of the loam type or the loam-clay type were in areas that did not vary much in average elevation, i.e. below 70 m. The two were often overlapped in distribution at a micro-region scope.At the study area scope, the spatial and temporal heterogeneity of the sedimentary environment, the wind transporting process and the soil farming and amelioration practices, such as local irrigation sedimentation, deep tillage, was great, which to a large extent reduced and masked the influence of elevation on spatial distribution of soil profile texture configuration. The higher the elevation of the parts of landform, the fewer the type of soil profile texture configuration developed; and the lower the elevation, the more the type developed. Moreover, the parts lower in elevation are often complex in soil profile texture configuration, and higher in elevation, simple in soil profile texture configuration. Areas complex in soil profile texture configurations may have been subjected to exposure of human interference, and as a result that the influence of landform on soil profile texture configuration does not have any specific law to follow.
Keywords:Fengqiu county  fuzzy c-means algorithm model  soil profile texture configuration  elevation
本文献已被 万方数据 等数据库收录!
点击此处可从《生态学报》浏览原始摘要信息
点击此处可从《生态学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号