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作 者 ：于明坚 陈启常 李铭红 史美中 曹剑波

期 刊 ：林业科学 1996年 32卷 2期 页码：103-110

关键词：青冈常绿阔叶林；元素含量；元素贮量；养分元素的累积特征；

Keywords:Evergreen broad-leaved forest dominated by Cyclobalanopsisglauca, Contents of elements, Amount of elements, Accumulating characteristics of elements,

摘 要 ：1990年至今对浙江建德青冈常绿阔叶林生态系统的养分循环进行了研究。报道了死地被层现存量,死地被层(包括L、F、H三亚层)和土壤(包括A、E、B三层)中C和8种养分元素的分布,以及植物对养分元素的累积特征。结果表明:死地被层现存量为14.141t/hm²,其中H>F>L.死地被物中9种元素含量和贮量大小依次为C>N>Ca>Mn>K>Mg>P>Zn>Cu,而土壤中为C>N(K)>K(N)>Mg>Mn>Ca>P>Zn>Cu。与其它地区相比,本区土壤中Mn和N的含量较高而P和Ca较低.不同元素具有不同的层次分布和季节变化特征。自表层至深层,C、N、Ca、Mn的含量呈下降趋势;而K、Mg的含量均在表层较低,并在深层有较高的含量;而P、Cu和Zn则以H与A层的含量为最高.植物对元素的累积特征因元素和层次(种类)而异。各元素中以Ca的富集系数最高,N次之,Cu和Zn最低;一般而言,藤本、草本和下木层植物对元素的累积程度比乔木层和亚乔木层要高。

Abstract:Nutrient cycling in the evergreen broad-leaved forest dominated by Cyclobalanopsis glauca was studied from 1990. In this paper,the amount of the forest floor,dynamics of carbon and eight nutrient elements in the forest floor(including three sublayers:L,F,H)and the soil(including three layers:A,E,B),and accumulating characteristics of nutrients in main plants are reported. The results show that:The amount of the forest floor is 14. 141t/hm², in which H>F>L.The order of contents and amount of elements in the forest floor is C>N>Ca>Mn>K>Mg>P>Zn>Cu, and that of the soil is C>N(K) >K(N)>Mg>Mn>Ca>P>Zn>Cu.Compared with other regions,the soil in this area have higher contents of Mn and N, and lower contents of P and Ca.Varied elements‘contents having different changing regularities in various layers and seasons.The contents of C,N and Ca descend with the drop of depth.The contents of K, Mg are lower in thesurface.The contents of P,Cu and Zn are higher in H sublayer and A layer,and that of K,Mg are higher in deep layers.The accumulating characteristics of nutrients in plants are different among elements and layers(species).The accumulating degree of Ca is the highest,the second is N,and that of Cu and Zn is the lowest.In general,the accumulating degree of liana,herbs and understory plents is higher than that of trees and subtrees.

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