不同海拔高度毛竹林凋落量动态分析  

Dynamics of Litterfall at Different Altitudes in Moso Bamboo Plantations

作　　者：唐轶琳[1] 周本智[1] 邓宗付[2] 唐荣清 王小明[1] 葛晓改[1] 曹永慧[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]中国林业科学研究院亚热带林业实验中心,江西分宜336600 [3]湖南省永州市冷水滩区林业局,湖南永州425000

出　　处：《林业科学研究》2013年第2期214-219,共6页Forest Research

基　　金：国家林业公益性行业科研专项项目(201104006);"十二五"国家科技支撑计划课题(2012BAD22B05);中国林科院亚热带林业研究所基本科研业务费项目(RISF6152)

摘　　要：2008年6月至2011年12月,通过对江西大岗山不同海拔高度(低海拔350 m,高海拔650 m)毛竹林凋落物的定位观测,分析研究了该地区毛竹林的凋落大小年周期、凋落进程以及凋落量受海拔高度的影响等。结果表明:(1)观测的2个海拔高度对毛竹林凋落量的影响不显著。观测期间,高海拔、低海拔年平均凋落量为(1 695.05±87.23)kg.hm-2。(2)毛竹林凋落大小年周期与日历年并不吻合,是跨年度的,持续时间12个月左右,周期的分界点在每年的6月前后,且小年的四季变化较大年更明显,仅春夏两季凋落量就占全年总凋落量的68.71%72.39%。(3)2008年初的特大冰雪灾害对毛竹林产生一定程度的干扰,且对高海拔的干扰相对低海拔更严重;但灾害发生2 a之后,其高海拔、低海拔凋落动态的各项指标均接近于该地区之前对未受灾毛竹林的研究结果。因此,认为冰雪灾害发生2 a之后,即2010年6月前后开始,该地区毛竹林凋落量已逐渐恢复到了灾前的正常状态。To assess the effects of altitude on litterfall dynamics and changes of periodic rules on moso bamboo （Phyllostachys edulis） , the seasonal and annual dynamics at different altitudes （350 m and 650 m） from June 2008 to December 2011 in Mount Dagangshan, Jiangxi Province, were studied. The results showed that ： （ 1 ） The annual average litter production of moso bamboo plantations at different altitudes during the period was estimated to be （ 1 695.05 ± 87.23 ） kg · hm^-2. The ANOVA analysis suggested that the influence of elevation to litter production was not significant. （2） There existed periodic rules in on-year and off-year, with a length of about 12 months and dividing point of every June. Compared with on-year, the seasonal variation of litter production in off-year was more remarkable. Litter production in spring and summer contributed 68.71% - 72. 39% of the total in off-year. （3） The moso bamboo plantations at high elevation site were more seriously affected by the 2008＇ s ice storm disas-ter compared with that of the low elevation site. Based on the study, it could be concluded that by June, 2010, the moso bamboo plantations may have recovered to be normal.

关 键 词：毛竹林 海拔 凋落周期 凋落动态 

分 类 号：S795[农业科学—林木遗传育种]