杉木中龄林和老龄林凋落物数量、组成及动态比较  

Litterfall in Two Forests of Middle-aged and Old-growth Chinese Fir:Amount,Composition and Seasonal Dynamics

作　　者：高玉春[1,2] 高人[1,2] 杨智杰[1,2] 盛浩[1,2] 张彪[1,2] 马书国[1,2] 

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]湿润亚热带生态-地理过程省部共建教育部重点实验室,福州350007

出　　处：《亚热带资源与环境学报》2010年第2期39-45,共7页Journal of Subtropical Resources and Environment

基　　金：福建省自然科学基金资助项目(D0510018)

摘　　要：通过对福建省南平市王台镇溪后村安曹下杉木中龄林(16 a生)和老龄林(88 a生)凋落物的数量、组成及动态进行为期2年的野外观测,结果表明:16 a生和88 a生杉木林年均凋落物总量分别为3.6 t.hm-2和3.4 t.hm-2,两林分的年均凋落物总量差异不显著,凋落物总量、落叶量、落枝量、落花量以及落果量在2007年和2008年间差异都不显著.落叶、落枝、落花和落果量占凋落物总量的比例分别为60%～63%、21%～24%、1%～3%和10%～13%.16 a生和88 a生杉木林凋落物总量及各组分凋落量的月动态曲线呈不规则型.统计分析得出,88 a生杉木林的落枝量与土壤体积含水量呈显著正相关的关系,这表明水分对杉木林凋落物动态具有一定程度的影响.The primary purpose of the present study was to determine litter amount and seasonal dynamics in middle-aged（16 year-old） and old-growth（88 year-old） plantations of Chinese fir（Cunninghamia lanceolata,CUL） in Nanping,Fujian,during 2007 and 2008.The mean annual total litterfall was 3.6 t·hm^-2 in the 16 year-old CUL and 3.4 t·hm^-2 in the 88 year-old CUL,respectively.Neither the difference of mean annual total litterfall in two CUL plantations,nor the differences of annual total litterfall and other litterfall fractions in two CUL plantations during 2007 and 2008 were significant.Of total litterfall in two plantations,proportions of the leaf,branch,flower and cone were 60%～63%、21%～24%、1%～3% and 10%～13%.Litterfall of two CUL plantations showed an irregular distribution pattern.The branch litter of the 88-year-old CUL was positively correlated with soil volumetric water content,suggesting that to certain extent water had effect on seasonal dynamics of litterfall in CUL.

关 键 词：杉木人工林 凋落物 林龄 土壤温度 土壤体积含水量 

分 类 号：Q948[生物学—植物学] S718.5[农业科学—林学]