Soil heterogeneity and root distribution of mature loblolly pine stands in piedmont soils
Soil heterogeneity and root distribution of mature loblolly pine stands in piedmont soils
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DOI：
10.2136/sssaj1996.03615995006000060043x
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发表时间：
1996-11
影响因子：
2.9
通讯作者：
M. M. Parker-M.;D. V. Lear
中科院分区：
文献类型：
--
作者：
M. M. Parker-M.;D. V. Lear
对成熟林分中影响生根模式的因素知之甚少。对火炬松(Pinus taeda L.)在克莱姆森大学实验森林，克莱姆森，南卡罗来纳州克莱姆森，沟渠剖面中的根和选定的土壤物理特征沿水分梯度的相关生根。旱生和亚旱生地的根密度大于中间立地。根密度随土层深度呈指数下降。细根(~lt；4mN)占总根数的83~95%，根槽平均比土壤基质高17倍。岩土界面上的根密度也高于土壤基质中的根密度。土壤的形态和物理特征以及立地在景观中的相对位置影响火炬松成熟林的根系生长和存活，并显著影响根系的分布。
Factors that influence rooting patterns in mature forest stands are poorly understood. We examined the distribution of loblolly pine (Pinus taeda L.) roots in trench profiles and related rooting to selected soil physical features along a moisture gradient on the Clemson University Experimental Forest, Clemson, SC. Root density was greater on xeric and subxeric sites than on intermediate sites. Root density declined exponentially with soit depth. Fine roots (<4 mn) accounted for 83 to 95% of all roots and averaged 17 fold higher in root channels than in the soil matrix. Root density was also higher along rock-soil interfaces than in the soil matrix. Soil morphological and physical features, as well as the relative position of the site in the landscape, influence root growth and survival and markedly affect the distribution of roots in mature loblolly pine stands.