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首页> 外文期刊>Forest Research Papers >Increase of natural regeneration area of Norway spruce (Picea abies L. Karst.) in the Kaszuby Lake District during the decade 2002–2012
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Increase of natural regeneration area of Norway spruce (Picea abies L. Karst.) in the Kaszuby Lake District during the decade 2002–2012

机译：挪威云杉自然再生区的增加（Picea Abies L.喀斯特。）在2002 - 2012年的Kaszuby Lake区

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The Kaszuby Lake District is located beyond the natural range of Norway spruce, however its share in local forest stands is considerable (14.8%) and its vitality and growth are here not less than within the natural range. The study presents the results of stock-taking of natural regeneration of Norway spruce in this region in year 2002 and 2012 and the relevant silvicultural recommendations. The stock of spruce natural regeneration was taken using the electronic database of the Regional Headquarters of State Forests in Gdańsk. The regeneration was put into following categories: seedlings (height below 0.5 m), lower advanced growth (height above 0.5 m and DBH below 7 cm), higher advanced growth (height above 3 m and DBH above 7 cm) and undergrowth (with dominating self sown spruce). In total 20 834 ha of Norway spruce natural regenerations were listed in year 2002 and 26 016 ha in year 2012 (increase by 24.9%). Most of them occur in fresh sites suited for mixed deciduous forests (LM?w) - in years 2002 and 2012 respectively 52.5% and 50.1%, and fresh sites suited for mixed coniferous forests (BM?w) - in years 2002 and 2012 respectively 30.4% and 32%. The increase of natural regeneration of Norway spruce in this period was connected with the 23.6% decrease in volume of spruce stands in age of above 40 years. Majority of spontaneously arriving spruce regenerations turn to the undergrowth, because of unfavorable light conditions under canopy and much to high density of seedlings and advanced growth. Good quality advanced growth on suited forest sites should be uncovered by thinning cuttings and consequently included into the future multispecies stands, with Norway spruce share up to 30%.
机译：Kaszuby Lake District位于挪威云杉的自然范围之外，然而其在当地森林站立的份额相当大（14.8％），其活力和增长在这里不低于自然范围内。该研究提出了2002年和2012年该地区挪威云杉自然再生的股票采购结果，以及相关的居文化建议。云杉自然再生库存是使用GDAńsk的地区森林区域总部的电子数据库采取的。再生被提出下列类别：幼苗（高于0.5米），增长率降低（高于0.5米和DBH以下低于7厘米），高级生长（高于3米高于7厘米以上的高于3厘米）和灌木自我播种的云杉。在2012年，2002年和26 016公顷上市总共20挪威尔韦挪威云杉自然再生（增加24.9％）。其中大部分都发生在适合于混合落叶林（LM？W）的新遗址 - 2002年和2012年分别为52.5％和50.1％，以及适合于混合针叶林（BM？W）的新遗址分别于2002年和2012年30.4％和32％。本期挪威云杉自然再生的增加与40岁以上的云杉大量减少23.6％。大多数自发到达云杉再生转向灌木丛，因为在树冠下不利的光线条件和高密度的幼苗和高级生长。高质量的森林地点的先进增长应通过稀释切割来揭示，并因此包含在未来的多层展台中，挪威云杉股份量高达30％。

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