华中丘陵红壤物理性质空间变异性的研究
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SPATIAL VARIABILITY OF PHYSICAL PROPERTIES OF RED SOIL IN HILLY LAND OF CENTRAL CHINA
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    摘要:

    本文应用地学统计学方法对丘陵红壤地区50×100m2面积内30个观察点进行了土壤饱和导水率、粘粒、水稳性团聚体、孔隙性等空间变异性研究。通过半方差函数和自相关函数分析,发现这些性质在一定范围內存在空间相关性。采用Kriging方法对各点进行了估测,并应用Cokriging技术,由一种参数估测另一种参数,取得了较为满意的结果。

    Abstract:

    Spatial variability of saturated hydraulic conductivity, clay and physical clay particles, water-stable aggregate and porosity of red soil were studied using a geostatistical method. Field experiments were undertaken on a red soil at Yingtan, Jiangxi Province, Clhina. There were thirty sampling locations in the experimental field with an area of 50×100 m. The autocor relation distances of various physical parameters determined in field were different according to the analysis of sermivariogram and autocorrelogram: saturated hydraulic conductivity of soil 42.0 m, clay 43.5m, physical clay 56.0 m, macroaggregate 47.0 m, total porosity 65.0m,porosity in diameter of > 0.03 mm 37.5 m and clay in layer B (20-30 cm) 45.0 m. The estimation of seven soil parameters by using Kriging interpolation method shows chat Kriging method was obviously better than Jackkniffing technology. Its estimated error was lust 67.5-30.5% of Jackniffings. Tlae saturated hydraulic conductivity of soil was esti0 mated by porosity in diameter of >0.01 mm and the clay content in B layer was estiamted by clay content in A layer in terms of Colcringing technology. Its estimated error was only 54.1-65.5% of that of linear regression method arid 36.2-86% of Kriging's respectively.

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梁春祥,姚贤良.华中丘陵红壤物理性质空间变异性的研究[J].土壤学报,1993,30(1):69-78. Liang Chunxiang, Yao Xianliang. SPATIAL VARIABILITY OF PHYSICAL PROPERTIES OF RED SOIL IN HILLY LAND OF CENTRAL CHINA[J]. Acta Pedologica Sinica,1993,30(1):69-78.

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  • 在线发布日期: 2013-02-25
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