| 杉木纯林土壤性质与林下植被的通径分析1） |
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| 引用本文： | 卢妮妮,高志雄,张鹏,徐雪蕾,王新杰.杉木纯林土壤性质与林下植被的通径分析1）[J].东北林业大学学报,2015(7):73-77. |
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| 作者姓名： | 卢妮妮 高志雄 张鹏 徐雪蕾 王新杰 |
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| 作者单位： | 北京林业大学，北京，100083 |
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| 基金项目： | 1)“十二五”农村领域国家科技计划课题(2012BAD22B05)。 |
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| 摘 要： | 以闽西北地区不同林龄的杉木人工纯林为研究对象，对林地土壤的理化性质、林下植被生物多样性和生物量进行通径分析。结果表明：（1）随着土层深度的加深和杉木纯林林龄的增长，土壤密度逐渐增大，土壤总孔隙度和土壤含水率逐渐减小，毛管孔隙度无明显变化。（2）随着林龄的增加，全钾、全氮、全磷质量分数呈逐渐增加趋势，速效钾、速效磷、有机质、铝和锌的质量分数先减少后增加。（3）随土层的加深，土壤中速效钾、碱解氮、速效磷、全氮和有机质的质量分数逐渐减少，铝、铁和镁元素的质量分数则逐渐增加。（4）随着林龄的增加，灌木的Shannon－Wiener指数先减小后增大，生物量逐渐增大；草本的Shannon－Wiener指数和生物量均先增大后减小。（5）土壤物理性质对灌木生物量和草本生物量有较大的影响；土壤中速效钾、全钾、全磷、铁和锌对林下植被多样性和生物量均有显著影响（ P＜0．05）。
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| 关 键 词： | 通径分析 杉木 土壤理化性质 林下植被 生物量 生物多样性 |
Path Analysis between Soil Properties and Undergrowth Vegetation in Pure Chinese Fir Forest |
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| Abstract: | We studied the characteristics and impact degree between soil property and undergrowth vegetation in pure Chinese fir forest with different ages by path analysis.With the increasing of soil depth and the growth of the Chinese fir, the soil bulk density increased, while the soil porosity and the moisture content decreased.There was no significant change on capillary of different age of Chinese fir.With the growth of the trees, total K, total N and total P were in the increasing trend, and available K, available P, organic matters and Zn content reduced first and then increased.With the increasing of soil depth, available K, available N, available P, total N and organic matter reduced gradually, while Al, Fe and Mg in-creased.As the trees grew , Shannon-Wiener index of shrub showed a“V” type trend, while that of herb was opposite.The biomass of shrub increased rapidly and that of herb showed reverse“V” type changing.Soil physical properties mainly af-fected shrub biomass and herb biomass,and the contents of available K , total K, total P, Fe and Zn played an important role on the growth of shrub and herb ( P<0.05) . |
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| Keywords: | s Path analysis Chinese fir Soil physicochemical properties Undergrowth vegetation Biomass Biodi-versity |
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