江苏省类黄土丘陵地的土壤类型及其分布规律
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*南京立业大学;江苏省土壤普查办公室;中国科学院南京土壤研究所地理室


CATEGORY AND DISTRIBUTION OF SOILS FROM LOESSLIKE SEDIMENTS IN HILL AREAS OF JIANGSU PROVINCE
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    摘要:

    调查分析了江苏省连云港、铜山、泗洪、南京、宜兴等5个丘陵地区类黄土发育的土壤。结果表明,以土壤剖面表下层的粉/粘比及其非粘粒部分的TiO2和Fe2O3含量等三项指标检验,省境內各地区类黄土母质的性质是逐渐变异的,很难截然划出下蜀组和戚咀组的界限。母质在性质上的这种变异特点,是类黄土所发育土壤呈现多样性的原因之一。参照《中国土壤系统分类(首次方案)》的标准,省境内丘陵区类黄土所发育的土壤可归入2土纲6土类(硅铝土纲的褐土、棕壤、酸性棕壤和铁硅铝土纲的黄褐土、黄棕壤、棕红壤);以主分量分析为基础的数值分类也得出类似结果,只是少了1个土类(棕壤)。各土壤剖面点在二维平面上的排序图显示,按地理区域围起来的土壤剖面点包括不同的土类,因而土壤带的范围与土类实际分布范围并非重合,而是部分交叠。目前习用的、从南到北区划的黄红壤、黄棕壤、黄褐土、棕壤褐土等3个地带,不能精确表达这一复杂现象。省境內类黄土发育的土壤从南到北虽也表现出一定的地带分异趋势,但各土类实际上是呈犬牙交错式分布,表现出交叠地带性规律。

    Abstract:

    Soils derived from the loess-like sediments in 5 hill areas of Jiangsu Province were studied.The examination results of the contents of TiO2 and Fe2O3 in non-clay fraction and the silt/clay ratio of subsoil samples showed that the properties of loess-like parent materials within Jiangsu Province varied gradually with location,and the boundary between Xiashu group and Qizui group of loess-like sediments was hard to ascertain.Such variation was one of the reasoms that diversified soils from the loess-like sediments.In the hill areas of Jiangsu Province,referring to Chinese Soil Taxonomic Classifition (1 st scheme),soils derived from loess-like sediments could be allocated into 6 soil great groups under 2 soil orders,i.e.,cinnamon soil,brown earth,acidic brown earth of Siallisols and yellow cinnaman soil,yellow-brown soil and brown-red soil of Ferosiallisols.Soil numerical classificatioci based on the principal component analysis reached a similar conclusion except that brown earth was absent.

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徐柏忠,罗汝英,李桂荣.江苏省类黄土丘陵地的土壤类型及其分布规律[J].土壤学报,1993,30(2):191-198. Xu Baizhong, Luo Ruying, Li Guirong. CATEGORY AND DISTRIBUTION OF SOILS FROM LOESSLIKE SEDIMENTS IN HILL AREAS OF JIANGSU PROVINCE[J]. Acta Pedologica Sinica,1993,30(2):191-198.

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  • 在线发布日期: 2013-02-25
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