首页   按字顺浏览 期刊浏览 卷期浏览 Natural regeneration on planted clear‐cuts in boreal Sweden
Natural regeneration on planted clear‐cuts in boreal Sweden

 

作者: Lennart Ackzell,  

 

期刊: Scandinavian Journal of Forest Research  (Taylor Available online 1994)
卷期: Volume 9, issue 1-4  

页码: 245-250

 

ISSN:0282-7581

 

年代: 1994

 

DOI:10.1080/02827589409382837

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Natural regeneration was registered on 97 clear‐felled and scarified sites in northeastern Sweden ten growing seasons after planting. On each site, three fix plots were laid out at planting and the planted seedlings were mapped. Ten years later all healthy non‐planted seedlings were registered in an anulus of size 15.7 m2. Non‐planted seedlings were also observed in four 4 m2squares on each fix‐plot to estimate the zero‐square frequency. Species were classified asPinus sylvestris,L.,Picea abies(L) Karst. and deciduous species(Betula pendulajpubescensRoth./Ehrh.,Populus tremulaL.,Alnus incana(L) Moench.). On average, 7 133 non‐planted seedlings ha‐1were found, of which 29% were conifers. Among the conifers, 71% wereP. abies.More than 2 500 conifer non‐planted seedlings ha‐1were found on 27% of the plots. The number of non‐planted seedlings was correlated to the presence of neighbouring seed‐producing stands within 100 m and decreased with rising altitude.Pinus sylvestrisseedlings were more frequent on dry soils while the deciduous seedlings were more frequent on wet sites. In the 4 m2squares, the zero‐square frequency was 29% if both conifers were and deciduous seedlings were considered and 63% if only conifers were considered. Mean height of the tallest seedling per species and square was 62 cm forP. sylvestris,42 cm forP. abiesand 107 cm for the deciduous seedlings. Key words:Alnus incana, Betula, broad‐leaves, deciduous, Norway spruce, Picea abies, Pinus sylvestris, Populus tremula, reforestation, Scots pine.

 

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