Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps
Báo cáo lâm nghiệp: "Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) natural regeneration" ppsx
... on high growing stock, wood production and especially the values of mensurational indices attract attention. At Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) ... Effect of site preparation on survival and growth of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) seedlings. New Forests, 3: 89–98. G L. (1996): Production capacity evaluation of the ... Czech)B F. 2007b): Natural regeneration of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) in forest stands of Hůrky Training Forest District, Higher Forestry School and Secondary Forestry...
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Báo cáo lâm nghiệp: "Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects on cambioxylophagous fauna" docx
... chemical thinning consists in the fact that trees killed by chem-ical treatment and left in the stand to their natural Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects ... Institute, Brandýs nad Labem, Czech RepublicABSTRACT: Chemical thinning was applied in blue spruce (Picea pungens Engelm.) stands by the application of Roundup Klasik and Garlon 4 EC. e thinning efficacy ... 2008). At present, thinning and re-constructions of these stands are carried out on a large scale. Silvicultural procedures applied in these stands are demanding both economically and tech-nologically....
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Báo cáo lâm nghiệp: "Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societies" ppt
... past Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societiesF. SZurich, SwitzerlandABSTRACT: e present distribution ... it has integrated increasing societal de-mands into current management practices. To assess the present and future options in management of forests, one has to be aware of the historical context. ... potential of forests in rural and urban areas (B et al. 2004; B, S 2005). e issues at stake are meeting local, national, and increasingly international environmental de-mands,...
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Báo cáo lâm nghiệp: " Long-term effects of CO2 enrichment on bud phenology and shoot growth patterns of Norway spruce juvenile tree" potx
... Research Intention of Institute of Systems Biology and Ecology, Project No. AV0Z 60870520. Long-term effects of CO2 enrichment on bud phenology and shoot growth patterns of Norway spruce juvenile ... acceleration of bud phenology result in prolonga-tion of the shoot growth period and in a subsequent enhancement of wood production (B 1994). e effect of long-term (months and years) CO2 enrichment ... the bud scales, and 4 – leaf per needle elon-gation). Shoot elongation growth was observed on exposed and shaded apical (ExA and ShA) and exposed and shaded lateral (ExL and ShL) buds/shoots....
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Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest" ppt
... precipitation rates, these machines are likely to remain the most common type of skid-ding machine used. In mountainous and steep areas, the terrain slope is an important factor that a ects operational ... costs and erosion. It may also a ect the soil compaction, so in planning forest operations and aligning skid trails the terrain slope may be an im-portant consideration for protecting soil ... productivity can be originated by such intense logging operations.e common effects on soils from ground based forest operations are increased compaction and removal of litter mass in skid trails (T...
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Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps
... variables, the stratification of the crown and the deletion of segments. In the present study, the effects of the choice of the auxiliary variable and of the created crown structure (segments and nodes, ... dele-tion of the stem segments. After this closer look at the old pine, the effect of stratification and deletion of the stem segments on the precision of estimates is to be studied for all trees of ... e analysis of the effects of the crown structure concentrates on the stratification of the crown and on the deletion of greater segments (e.g. the stem) by using the classical RBS. Statistical...
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Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps
... Hydrotechnical meliorations. Drainage channels. Praha, ČSNI 1993. (in Czech) Drainage (1973): Principles and applications. Part II – eo-ries of drainage and watershed runoff. Wageningen, Interna-tional ... based on the expansion and shrinkage of variable source areas and consequent changes in a drainage network during a discharge event. e runoff investigation was carried out in a forested watershed ... precipitation minus interception, in ltration, evaporation and storage losses (H 1988; K 1996).First, the effects of drainage treatment and stand growth on changes in runoff were analyzed...
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Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot
... Weevils of the genus Phyllobius – consumption of food on birch affected by differentiated inputs of nitrogen Fig. 7. e weight of the dry matter of birch leaves affected by the application of ammonium ... Mean consumption of food by females of Phyllobius arborator after 6 days of feeding in a laboratory rearing (0.95 reliability intervals)Fig. 10. Mean consumption of food by males of Phyllobius ... nega-tive response induced by the nitrogen surplus when the content of nitrogen ions in the substrate probably acted as a stress factor causing the disturbance of the uptake of other nutrients...
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Báo cáo lâm nghiệp: "The effects of flooding and Phytophthora alni infection on black alder" pps
... test).RESULTS AND DISCUSSIONConfirmation of flooding and P. alni infection effects on black aldere analysis of covariance confirmed that the both factors (flooding and P. alni infection) and their ... condition was Table 1. e effect of long-term flooding and Phytophthora alni infection on the development of black alder saplings Treatment per valid NLength of necrosis (cm)Root biomass (g)Actinorrhiza ... of the factors plant height (covariate), flooding, P. alni and ooding ì P. alni interaction on depend-ing variables (increase in stem length, length of leaves and biomass of leaves, roots and...
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Báo cáo lâm nghiệp: "Differences in fine root traits between Norway spruce (Picea abies [L.] Karst.) and European beech (Fagus sylvatica L.) " potx
... problem, for instance comparing Norway spruce (Picea abies [L.] Karst.) and European beech (Fagus sylvatica L.; S 2002), Norway spruce, Scots pine (Pinus sylvestris L.) and European beech (F ... E., 2007. Variation in fine root biomass of three European tree species: beech (Fagus sylvatica L.), Norway spruce (Picea abies L. Karst.), and Scots pine (Pinus sylvestris L.). Plant Biosystems, ... situations and, consequently, also differences in the resistance of particular tree species to changing Differences in fine root traits between Norway spruce (Picea abies [L.] Karst.) and European beech...
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Báo cáo lâm nghiệp: "Variation in wood volatile compounds in a mixed oak stand: strong species and spatial differentiation in whisky-lactone content" pptx
... threeecological zones: a small valley, a plateau and a regular intermediateslope. The plateau is covered by a well drained soil and composedof sand and slit. The small valley is characterized ... compounds in a mixed oak stand: strong species and spatial differentiation in whisky-lactone contentAndrei P a ,AlexisDb,RémyJ.Pb, Gérard Nc, Jean-Louis P a * a Unité ... extractive compounds of cooperage oak wood play an essential role in wine and spirits maturation in oak casks. They generally have low aroma thresholds so thattheir sensorial detection takes place...
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Báo cáo lâm nghiệp: "Predicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliation" potx
... 10.1051/forest:2005018Original articlePredicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliationDavid POTHIERa*, Daniel MAILLYb, ... – To predict the reduction in growth of balsam fir (Abies balsamea (L.) Mill.) subjected to spruce budworm (Choristoneurafumiferana (Clem.)) epidemics, tree-ring chronologies of dominant trees ... of inventory and the starting year of calculations.Therefore, the general objective of this study is to test thepredictive capacity of the historical records of defoliation toexplain the growth...
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Báo cáo lâm nghiệp: "Carbon pool and substitution effects of an increased use of wood in buildings in Switzerland: first estimates" pdf
... GHG-related effects of an increased use of wood within technosphere.One important effect of an increased use of wood wasneglected: the decline of the carbon storage in the forestsbecause of an increased ... articleCarbon pool and substitution effects of an increased use of wood in buildings in Switzerland: first estimatesFrank WERNERa*, Ruedi TAVERNAb, Peter HOFERb, Klaus RICHTERca Environment and ... emissions of around 18% of the total effect of an increased use of wood in Switzerland.If one considers the effect of an increased use of wood in the mirror of the reduction commitment in absolute...
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Báo cáo lâm nghiệp: "Can understory vegetation accurately predict site index? A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl.) stands in northern France" ppt
... A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl.) stands in northern FranceLaurent BERGÈS a *, Jean-Claude GÉGOUTb, Alain FRANCc a Cemagref, ... combinedthe CA Axes and soil water capacity and was slightly better thanmodels M4 and M1. Model M7 combined abiotic indices (SWC0-150 and Mg/K) and floristic indices (CA Axis 1 and Axis 3) and ... January 2005)Abstract – We investigated the relevance of understory vegetation in indicating site productivity as expressed by sessile oak (Quercus petraea Matt. Liebl.) site index over a large...
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Báo cáo lâm nghiệp: "Using past growth to improve individual-tree diameter growth models for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain" doc
... individual-tree diameter growth models for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain Antoni TRASOBARESa*, Timo PUKKALAb a Centre Tecnològic Forestal ... study, growth models of individual tree diameter for uneven-aged mixtures of P. sylvestris and P. nigra in Catalonia weredeveloped using a past growth index as site descriptor. These models ... application. In this study, models of the growth of individual-tree dia-meter for uneven-aged mixtures of P. sylvestris and P. nigra in Catalonia were developed using a past growth index as anadditional...
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