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缙云山森林土壤速效N、P、K时空特征研究 预览 被引量:31

Study on temporal and spatial characteristics of available soil nitrogen ,phosphorus ,and potassium among the forest ecosystem of Mt.Jinyun
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摘要 研究了缙云山森林生态系统内4个演替阶段群落的土壤速效N、P、K的时空特征,结果表明:①除灌草丛的速效K外,速效N、P、K含量在不同群落的土壤剖面上均具有明显的层次性,即腐殖质层(A)>沉积层(B)>母质层(C).②A、B两层的速效N、K含量随群落演替方向升高,即灌草丛<针叶林<针阔混交林<常绿阔叶林,速效P含量则为:针叶林<针阔混交林<灌草丛<常绿阔叶林.C层速效N、P、K含量似乎与群落演替规律无必然联系.③各群落内A、B层土壤速效N、P、K含量均表现出明显的季节动态,动态规律因元素类型和土壤层次而有差别. Temporal and spatial distribution characteristics for the availability of soil nitrogen,phosphorus,and potassium among four successional communities of forest ecosystem on Mt.Jinyun are studied in this paper.The results showed that,(1)Except for available potassium of shrub\|grassland,the content of nitrogen,phosphorus and potassium of soil profiles in different communities has evident gradients,i.e.,humus horizon(A)>illuvial horizon(B)>parent material horizon(C);(2)The content of available nitrogen and potassium of A and B horizons increases along the successional direction,i.e.,shrub\|grassland<coniferous forest<coniferous\|broad leaved mixed forest<evergreen broad leaved forest.Except for shrub\|grassland,the content of available phosphorus of A and B horizons also increases with the successional direction,i.e.,coniferous forest<coniferous\|broad leaved mixed forest<evergreen broad leaved forest.The content of available nitrogen,phosphorus and potassium of C horizons shows no certain relationships with the successional law;(3)The content of available N,P,and K of A and B horizons in various plant communities has evident seasonal fluctuations,the fluctuations depend on the element types and soil horizons.
作者 杨万勤 钟章成 陶建平 何维明 YANG Wan\|Qin,ZHONG Zhang\|Cheng,TAO Jian\|Ping,HE Wei\|Ming (College of Life Science,Southwest China Normal University,Chongqing\ 400715)
出处 《生态学报》 CAS CSCD 北大核心 2001年第8期 1285-1289,共5页 Acta Ecologica Sinica
基金 国家自然科学基金
关键词 时空特征 森林土壤 缙云山 速效N 速效P 速效K available nitrogen phosphorus and potassium temporal and spatial distribution characteristics forest soil Mt.Jinyun
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