| 西南喀斯特地区不同石漠化阶段土壤物理参数的变异研究 |
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| 引用本文： | 周炼川,陈效民,李孝良,,杨新强,夏雯,崔晨.西南喀斯特地区不同石漠化阶段土壤物理参数的变异研究[J].延边大学理工学报,2010,0(2):195-199. |
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| 作者姓名： | 周炼川 陈效民 李孝良 杨新强 夏雯 崔晨 |
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| 作者单位： | (1.南京农业大学 资源与环境科学学院,江苏 南京 210095; 2.安徽科技学院 植物科学学院,安徽 凤阳 233100) |
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| 摘 要： | 为了探索中国西南喀斯特地区石漠化过程中土壤物理性质的变异规律,采用野外采样与实验室分析相结合的方法,对贵州省荔波县及普定县不同石漠化阶段典型土壤的物理参数进行了研究。结果表明:土壤有机质质量分数随石漠化程度的加深逐渐减小;非石漠化土壤重度仅为6.15N/m3,随着石漠化的发展,土壤重度逐渐增大,总孔隙度随之减小;石漠化的发展导致土壤黏粒含量升高;土壤水稳性团聚体质量分数及微团聚体的结构系数均随石漠化程度加深而减小;土壤有机质质量分数与重度、砂粒含量、大于5mm团聚体含量及结构系数的相关系数分别为-0.9212、0.8277、0.9072、0.8993,均达到极显著水平。通过封山育林等措施增加喀斯特地区有机质积累可改善土壤物理性质,对防治石漠化具有重要意义。
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| 关 键 词： | 喀斯特地区 石漠化 物理参数 变异 有机质 土壤结构 |
Variation of Physical Parameters of Soil Under Different Rocky Desertification in Karst Region,Southwest China |
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| ZHOU Lian-chuan,CHEN Xiao-min,LI Xiao-liang,' target="_blank" rel="external">,YANG Xin-qiang,XIA Wen,CUI Chen.Variation of Physical Parameters of Soil Under Different Rocky Desertification in Karst Region,Southwest China[J].Journal of Yanbian University (Natural Science),2010,0(2):195-199. |
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| Authors: | ZHOU Lian-chuan CHEN Xiao-min LI Xiao-liang " target="_blank">' target="_blank" rel="external"> YANG Xin-qiang XIA Wen CUI Chen |
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| Affiliation: | (1.School of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China; 2.School of Plant Sciences, Anhui Science and Technology University, Fengyang 233100, Anhui,China) |
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| Abstract: | In order to explore the variation of soil physical properties under rocky desertification, the physical parameters of soil collected in Libo and Puding Counties of Guizhou Province were studied by means of field sampling and indoor analysis. The result showed that: content of soil organic matter decreased with serious rocky desertification; bulk density of soil(only 6.15 N/cm3), which did not degrade, increased and soil porosity decreased with serious rocky desertification; content of soil clay particles rose because of serious rocky desertification; content of water-stable aggregates and coefficient of soil structure decreased with serious rocky desertification; correlation coefficients among content of soil organic matter, sandy particles and water-stable aggregates(>5 mm)and soil structure index were extremely significant, and the values were -0.921 2, 0.827 7, 0.907 2 and 0.899 3, respectively. Enhancing content of soil organic matter with forest conservation was an effective way to prevent rocky desertification and to improve soil physical properties in Karst region. |
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| Keywords: | Karst region rocky desertification physical parameters variation organic matter soil structure |
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