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搜索结果: 1-15 共查到农学 Douglas fir相关记录19条 . 查询时间(0.578 秒)
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...
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...
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 ...
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...
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...
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...
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...
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...
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...
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...
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...
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 (...
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...
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...
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...

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