2022年11月28日 星期一
亚高山云冷杉混交林树木生长释放与干扰分析
Growth release and disturbance of conifer trees in subalpine spruce-fir mixed forest
1997年 第6卷 第1期 页码[1-8]    下载全文[1MB]  
摘要

对云南碧塔海亚高山云冷杉林内 4 个样地冠层树木的生长压制和释放的历史, 用树木年轮分析方法进行了重建, 然后根据生长释放频率推测林冠干扰强度(10 年冠层树木的死亡百分)。 4 个林分(1 个中龄林, 3 个成过熟林)生长释放的平均百分率为 48 %~ 92%。 中龄林内, 均生长释放频率为 7.1%/ 10a, 成过熟林则为 7.4 %~ 9.5 %/10a, 在油麦吊云杉Picea brachytyla
var.complanata (M ast .)Cheng ex Rehd .〕占优势的林分和大果红杉(Larix potaninii var.macrocarpa Law)-油麦吊云杉混交林分内, 估测的林冠干扰强度分别为 4.8%/ 10a 5.9 %/ 10a

 

Abstract

Tree ring analysis was used to reconstruct the history of growth suppression and release of conifer trees in four stands within a subalpine spruce-fir mixed fo rest in Bitahai Natural Reserve, nor thr-west of Yunnan Province. And then , the canopy disturbance intensity (the percent of mortality of canopy trees per decade)were infered from the frequency of the growth release.For all stands (one was young growth,the others were old-growth), the average values of growth release frequency were 7 .1% per decade in y oung stand and 7.4% to 9 .5 %per decade in the old stands. The estimated disturbance intensities were 4 .8 % per decade in the stand do minated by Picea brachytyla var.complanata (M ast .)Cheng ex Rehd.and 5.9 % per decade in Larix potaninii var. macrocarpa Law-Picea brachytyla var. complanata (M ast.)Cheng ex Rehd.stand .

关键词林冠干扰; 生长释放; 生长压制; 林冠干扰强度估计;
Key wordscanopy disturbance; g rowth release; grow th suppressio n; estimation of canopy disturbance intensity
作者夏 冰 ,贺善安 ,兰 涛 ,邓 飞, 姚 淦
所在单位江 苏 省中国科学院植物研究所, 南京 210014
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基金项目国家自然科学基金资助项目(39470564)