起源和坡向对陕北黄龙山油松林土壤特征的影响  

Physical and Chemical Properties of Soil in Pinus tabuliformis Forest of Huanglong Mountains Based on Aspects and Forest Origins

作　　者：武建超 吴普侠 刘奕博 陈佳卉 宋淏 WU Jian-chao;WU Pu-xia;LIU Yi-bo;CHEN Jia-hui;SONG Hao(Shaanxi Academy of Forestry,Xi'an,Shaanxi 710082;College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100)

机构地区：[1]陕西省林业科学院,西安710082 [2]西北农林科技大学林学院,陕西杨凌712100

出　　处：《陕西林业科技》2020年第6期6-13,共8页Shaanxi Forest Science and Technology

基　　金：国家重点研究发展计划项目(2016YFD0600203);陕西省林业重点项目(SHLY-2018-02)。

摘　　要：以陕西省延安市黄龙山林区24块不同起源、不同坡向的油松林样地为对象,研究分析了不同类型油松林中土壤理化性质的差异,探讨了引起差异的主要原因。结果显示:(1)不同样地类型间,土壤理化性质指标的相关性不同,且含量存在差异。(2)土壤化学性质中,土壤全磷、全碳、有机质的含量有显著差异。全磷含量、全碳含量、土壤碳氮比均表现为阳坡大于阴坡,而土壤有机质含量表现为阴坡大于阳坡。全碳含量和土壤碳氮比在人工林样地中显著大于天然林样地。(3)土壤物理性质中,除土壤酸碱度外,其余指标均无显著差异。(4)主成分分析结果显示,油松天然林和人工林的主要土壤理化性质特征分别为土壤有机质含量和土壤含水量。Soil characteristics is highly related to the development of forest ecosystem.In order to explore the differences of soil physical and chemical properties among different Pinus tabuliformis forests and to provide theoretical basis for the region's future plantation management,we established 24 study plots located at different slope aspects and with different origins in Huanglongshan forest region of Shaanxi province.The physical and chemical properties of soil were analyzed.The results showed that i)the correlations of physical and chemical properties among different land types were different,and the content of soil physical and chemical properties was significantly different;ii)of soil chemical properties,the content of soil total phosphorus,total carbon,organic matter content were significantly different among plots.The total phosphorus content,total carbon content and soil carbon nitrogen ratio were all higher in sunny slopes than in the shade slopes,while the organic matter content was higher in the shade slopes than in the sunny slopes.The total carbon content and soil C/N ratio in plantation forest plots were significantly higher than that in natural forest plots;iii)there was no significant difference among soil physical properties except soil pH values,and iv)by principal component analysis,the content of soil organic matter and soil water content are the main physical and chemical character of natural forest plots and plantation forest plots,respectively.

关 键 词：森林起源 坡向 油松 主成分分析 

分 类 号：S791.254.02[农业科学—林木遗传育种]