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

... 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. (1...

Ngày tải lên: 07/08/2014, 03:22

... 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 Republic ABSTRACT: Chemical thinning was applied in blue spruce (Picea pungens Engelm.) stands by the appli...

Ngày tải lên: 07/08/2014, 03:22

... past Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societies F. S Zurich, Switzerland ABSTRACT: 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,...

Ngày tải lên: 07/08/2014, 03:22

... Research Intention of Institute of Systems Biology and Ecology, Project No. AV0Z 60870520. Long-term effects of CO 2 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...

Ngày tải lên: 07/08/2014, 03:22

... 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 consideratio...

Ngày tải lên: 07/08/2014, 03:22

... 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 seg...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 03:22

... 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. Me...

Ngày tải lên: 07/08/2014, 10:21

... test). RESULTS AND DISCUSSION Confirmation of flooding and P. alni infection effects on black alder e 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 N L...

Ngày tải lên: 07/08/2014, 10:21

... 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...

Ngày tải lên: 07/08/2014, 10:22

... three ecological zones: a small valley, a plateau and a regular intermediate slope. The plateau is covered by a well drained soil and composed of sand and slit. The small valley is characterized ... compounds in a mixed oak stand: strong species and spatial differentiation in whisky-lactone content Andrei P a ,AlexisD b ,RémyJ.P b , Géra...

Ngày tải lên: 07/08/2014, 16:20

... 10.1051/forest:2005018 Original article Predicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliation David POTHIER a *, Daniel MAILLY b , ... – To predict the reduction in growth of balsam fir (Abies balsamea (L.) Mill.) subjected to spruce budworm (Choristoneura fumiferana (Clem.)) epidemics, tree-...

Ngày tải lên: 08/08/2014, 00:21

... GHG- related effects of an increased use of wood within technosphere. One important effect of an increased use of wood was neglected: the decline of the carbon storage in the forests because of an increased ... article Carbon pool and substitution effects of an increased use of wood in buildings in Switzerland: first estimates...

Ngày tải lên: 08/08/2014, 00:22

... A comparative study using floristic and abiotic indices in sessile oak (Quercus petraea Liebl.) stands in northern France Laurent BERGÈS a *, Jean-Claude GÉGOUT b , Alain FRANC c a Cemagref, ... combined the CA Axes and soil water capacity and was slightly better than models M4 and M1. Model M7 combined abiotic indices (SWC 0-150 and Mg/K)...

Ngày tải lên: 08/08/2014, 00:22

... individual-tree diameter growth models for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain Antoni TRASOBARES a *, Timo PUKKALA b a Centre Tecnològic Forestal ... study, growth models of individual tree diameter for uneven-aged mixtures of P. sylvestris and P. nigra in Catalonia were...

Ngày tải lên: 08/08/2014, 01:21