搜索结果: 1-9 共查到“农学 Pseudotsuga menziesii”相关记录9条 . 查询时间(0.078 秒)
Double-spined bark beetle (Ips duplicatus) (Coleoptera: Curculionidae): a new host – Douglas fir (Pseudotsuga menziesii) – Short Communication
Czech Republic forestry pest Scolytinae
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...
Eff ects of Douglas-fi r (Pseudotsuga menziesii [Mirb.] Franco) on understorey layer species diversity in managed forests
species community composition nitrification
2015/5/5
In total, 67 parallel plots were chosen from the database of 153 phytosociological relevés made in the
Douglas-fir and parallel Norway spruce, European Beech and oak-dominated stands to find influen...
Economic Impact of Douglas-fi r (Pseudotsuga menziesii [Mirb.] Franco) production in the Czech Republic
forest production cost forest production efficiency
2015/5/5
The article addresses the issues of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) production in
the Czech Republic (CR). Our analysis shows that the tree species can occupy 149,616–163,713 ha i...
Prosperity of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) plantations in relation to the shelter
forest regeneration clear-cut area size
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...
Root system development in Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) on fertile sites
Douglas fir root system fertile sites
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
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...
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
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...
Diversification of increment reactions of Douglas fir (Pseudotsuga menziesii Franco) from mountainous regions of southern Poland
Douglas fir dendroclimatology tree ring
2015/1/28
Dendroclimatological research presented in this paper concerns Douglas fir (P. menziesii) at 17 sites located in the area of the Sudetes Mountains, the Polish part of the Carpathians and Roztocze. The...
The Effects of Origin and Regional Differences on the Density of Douglas Fir [Pseudotsuga menziesii（Mirb.）Franco] Wood
Origin and Regional Differences Density of Douglas Fir [Pseudotsuga menziesii (Mirb.) Franco] Wood
2009/1/16
In this study, the effects of origin and regional differences on the density of Douglas Fir [Pseudotsuga menziesii (Mirb.) Franco] wood were investigated. A total of 18 trees of 23 different ages obta...