摘要
【目的】分析影响色季拉山典型天然林急尖长苞冷杉Abies georgei var. smithii天然更新影响因子,为有效提高其天然更新提供理论指导。【方法】基于野外样方调查,分析色季拉山阴坡与阳坡5种影响因子与急尖长苞冷杉天然更新幼苗密度的相关性;通过通径分析找到影响其天然更新的关键因子。【结果】阳坡和阴坡种子带翅长度、种子千粒重、苔藓厚度、凋落物厚度及阳坡林分郁闭度与急尖长苞冷杉天然更新幼苗密度均呈现极显著正相关(P<0.01);通径分析认为阳坡凋落物厚度是影响急尖长苞冷杉天然更新幼苗生长的最关键因子,阳坡各影响因子对幼苗密度的影响大小依次为凋落物厚度、种子千粒重、苔藓厚度、种子带翅长度、林分郁闭度;阴坡苔藓厚度是影响急尖长苞冷杉天然更新幼苗生长的最关键因子,阴坡各影响因子对幼苗密度的影响大小依次为苔藓厚度、凋落物厚度、种子千粒重、林分郁闭度、种子带翅长度。【结论】凋落物厚度是影响色季拉山阳坡急尖长苞冷杉天然更新幼苗密度的最大因子,阴坡苔藓厚度是最关键因子。
[Objective] This paper with an analysis of the influencing factors of natural regeneration of Abies georgei var. smithii in Sejila Mountain, is aimed to provide theoretical guidance for the effective promotion of its natural regeneration. [Method] Based on a field sample survey as well as an analysis of the correlation between the seedlings density and the five influencing factors on shady and sunny slopes of A. georgei var.smithii in Sejila Mountain, the path analysis was carried out to find out the key factors affecting its natural regeneration. [Result] On both sunny and shady slopes, there was a significant positive correlation between the natural regeneration seedlings and the length of seed wing, 1 000-seed weight, moss thickness, litter thickness,canopy density of sunny slope. Litter thickness was the most important factor affecting the growth of natural regeneration seedlings of A. georgei var. smithii on sunny slope and the order of contribution to seedlingsdensity was litter thickness, 1 000-seed weight, moss thickness, winged seed length and canopy density. Moss thickness was the most important factor affecting the growth of natural regeneration seedlings of A. georgei var.smithii on shady slope and the order of contribution to seedlings density was moss thickness, litter thickness, 1 000-seed weight, canopy density and winged seed length. [Conclusion] Litter thickness was the largest factor affecting the density seedlings of A. georgei var. smithii on sunny slope, while moss thickness on shady slope was the most critical factor.
作者
王瑞红
潘刚
张新军
李江荣
张新建
WANG Ruihong;PAN Gang;ZHANG Xinjun;LI Jiangrong;ZHANG Xinjian(Research Institute of Tibet Plateau Ecology,Tibet Agriculture&Animal Husbandry University,Linzhi 860000,Tibet,China;National Key Station of Field Scientific Observation&Experiment,Tibet Agriculture&Animal Husbandry University,Linzhi 860000,Tibet,China;Tibet Key Laboratory of Forest Ecology in Plateau Area,Ministry of Education,Tibet Agriculture&Animal Husbandry University,Linzhi 860000,Tibet,China;Organization Department of CPC Tibet Agriculture&Animal Husbandry University Committee,Linzhi 860000,Tibet,China)
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2021年第3期652-658,共7页
Journal of Zhejiang A&F University
基金
西藏自治区自然科学基金资助项目[XZ2018ZRG-18,XZ2018ZRG-27(Z)]。
关键词
急尖长苞冷杉
天然更新
相关性分析
通径分析
色季拉山
Abies georgei var.smithii
natural regeneration
correlation analysis
path analysis
Sejila Mountain
