搜索结果: 1-15 共查到“林学 Douglas-fir”相关记录19条 . 查询时间(0.071 秒)
Shifts in Foliage Biomass and Its Vertical Distribution in Response to Operational Nitrogen Fertilization of Douglas-Fir in Western Oregon
Douglas-fir nitrogen fertilization foliage distribution allometry biomass
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2024/2/4
Nitrogen (N) fertilization is a commonly applied silvicultural treatment in intensively managed coast Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) plantations. Field trials were e...
Dynamics and Vertical Distribution of Roots in European Beech Forests and Douglas Fir Plantations in Bulgaria
Keywords annual production biomass Decision Matrix necromass root traits root mass sequential coring turnover rate
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2024/2/26
Recently, increasing attention has been paid to the anthropogenic degradation of the riverbed and its relationship to the ecological status of the adjacent river landscape. The key objective of this r...
Root system development in naturally regenerated Douglas-fir saplings as influenced by canopy closure and crowding
natural regeneration competition shading physical tree stability
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2015/9/15
Documented information on the growth dynamics and related silvicultural manipulation of naturally
regenerat ed Douglas-fir beneath a canopy shelter is scarce. We hypothesized that long regeneration ...
Does prolonged stratification of Douglas fir influence the yield of seedlings?
provenance germination emergence
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2015/7/2
A total of ten seed lots were used for evaluating germination capacity, originating from the Czech Republic, Slovakia,
France and the USA. Germination capacity, emergence rate and yield of seedlings...
Double-spined bark beetle (Ips duplicatus) (Coleoptera: Curculionidae): a new host – Douglas fir (Pseudotsuga menziesii) – Short Communication
Czech Republic forestry pest Scolytinae
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2015/7/2
This paper documents the first recorded
successful development of I. duplicatus on Douglas fir (Pseudotsuga menziesii) (Mirbel) Franco. Two densely infested
Douglas fir trees were found in a fores...
Results of 20 years old Douglas-fir provenance experiment established on the northern slopes of Rila Mountain in Bulgaria
Pseudotsuga menziesii introduction
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2015/5/5
The purpose of this study is to facilitate the detection of provenances relevant to the reforestation practice
in Bulgaria. Studies were carried out in a Douglas-fir provenance trial plantation esta...
Prosperity of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) plantations in relation to the shelter
forest regeneration clear-cut area size
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2015/4/24
The study evaluates the mortality, growth and qualitative characteristics of Douglas fir transplants planted out on clear-cut areas with different shelter. We assessed 11 clearings situated in the For...
Soil-forming effect of Douglas fir at lower altitudes – a case study
tree species composition forest soil changes Norway spruce nutrient cycle
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2015/4/24
Forest ecosystem and in particular forest soil biodiversity and stability could be jeopardised by the impropriate tree species composition. Douglas fir is a species which has a high potential in Europ...
Production of Douglas-Fir in the Czech Republic based on national forest inventory data
Douglas-fir introduced species time series age structure production
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2015/4/24
This article summarizes basic estimates of productivity and trend analysis of one of the principal introduced forest tree species in the Czech Republic, i.e. Douglas-fir (Pseudotsuga menziesii [Mirbel...
Root system development in Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) on fertile sites
Douglas fir root system fertile sites
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2015/4/14
The paper analyses the root system development in the artificially established stands of Douglas fir aged 10, 20, 30, 60 and 80 years on aerated soils (Cambisols) without skeleton. On these sites, the...
Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration
Douglas fir herbicides introduced tree species natural regeneration
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2015/3/19
Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration under parent stand after weed suppression was investigated in the area of the Training Forest Enterprise in Kostelec nad Če...
Production potential of Douglas fir in acid sites of H鵵ky Training Forest District, Secondary Forestry School in P韘ek
Douglas fir Norway spruce Scots pine
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2015/3/16
The study is a follow-up of the production potential of Douglas fir in mesotrophic sites of the K鴗iny Training Forest Enterprise (TFE) (Journal of Forest Science, No. 7, 2008). Production parameters (...
Humus conditions of stands with different proportion of Douglas fir in the H鵵ky Training Forest District and K鴗iny Training Forest Enterprise
species composition soil forest floor reserves
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2015/3/16
The paper presented evaluates reserves and chemical composition of forest floor of three stands of Douglas fir, spruce and spruce with beech at acid sites (3K) in the H鵵ky Training Forest District (TF...
Production potential of Douglas fir at mesotrophic sites of Křtiny Training Forest Enterprise
Douglas fir Norway spruce European larch production potential mesotrophic sites
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2015/3/12
The study evaluates production parameters (height, diameter at breast height, volume) of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) at mesotrophic sites of the Křtiny Training Forest Ente...
Natural regeneration of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) in forest stands of Hurky Training Forest District, Higher Forestry School and Secondary Forestry School in Pisek
self-seeding advance growth radiation
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2015/3/6
Possibilities are assessed of the natural regeneration of Douglas fir under conditions of Hůrky Training Forest District, Higher Forestry School and Secondary Forestry School in Písek, in stand 1...