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亚热带樟树林凋落物量及其养分动态特征

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2009年至2010年,在湖南省森林植物园对樟树林的凋落物生物量及养分归还量进行为期1 a的定位研究.结果表明:樟树林的年凋落物量为3.26 t·hm-2a-1,凋落叶占绝对优势(71.09％),年凋落物量的月变化模式为单峰型,8月份出现高峰值；N、S、P、K、Ca、Mg这6种大量元素的养分年归还量共计为78.433 9±4.129 1 kg·hm-2a-1,N最大,P最小；就各组分而言,各元素在凋落物各组分中的养分归还量均表现为落叶＞落枝＞落果；樟树林凋落叶的分解速率为2.465 1 t·a-1,95％周转期为1.22 a,50％周转期为0.28 a,而凋落枝的分解速率为0.928 9 t·a-1,95％周转期为3.23 a,50％周转期为0.75 a；凋落枝和叶的分解均是在夏季速度最快.
Litter fall production and nutrient dynamics of Cinnamomum camphora in subtropical region
Based on the position research of Cinnamomum camphora forest for a year (2009～2010) in Hunan forest botanical gardens, the biomass and nutrition returns of the stand were investigated. The results show that the annual litter of the forest was 3. 26 t · hm-2a-1 and leaf dominated(in 71. 09%), and the monthly litter fall pattern appearing single peak, appeared litter peak in August; the total of forest litter nutrients return quantity of N, S, P, K, Ca, Mg was 78. 433 9±4. 129 1 kg · hm-2a-1. To every components, the elements in the litter nutrient components were ordered from large to small: foliage>branches>fruits; the decomposition rate of leaf litter was 2. 465 1 t · a-1, 95% turnover was 1. 22 year, 50% turnover was 0. 28 year, and that of branch litter was 0. 928 9 ta-1, turnover was 3. 23 year, 50% turnover was 0. 28 year. The decomposition of the branches and leaf of the litter was the fastest in the summer.

litter production dynamicslitter nutrient dynamicslitter decomposition rateCinnamomum camphora

李洁冰、闫文德、马秀红

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中南林业科技大学，湖南长沙410004

北京市天竺苗圃，北京100621

凋落物量动态 凋落物养分动态 凋落物分解速率 樟树

国家林业公益性行业科研专项教育部新世纪优秀人才支持计划湖南省科技厅项目湖南省教育厅资助项目长沙市科技局项目

200804030NCET-10-01512010TP4011-3湘财教字[2010]70号K1003009-61

2011

中南林业科技大学学报
中南林业科技大学

中南林业科技大学学报

CSTPCDCSCD北大核心
影响因子：1.442
ISSN：1673-923X
年,卷(期)：2011.31(5)
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