Báo cáo lâm nghiệp: "Are ecophysiological responses influenced by crown position in cork-oak?" ppsx

... refer to north and south directions, which Short note Are ecophysiological responses influenced by crown position in cork-oak? G Oliveira, C Werner, O Correia Secçâo de Ecologia ... contribution was similar in all sections of the canopy, as a consequence of different leaf performances according to position in the crown. On the other hand,...

Ngày tải lên: 08/08/2014, 18:21

... http://dx.doi.org/10.1051/forest:2005012 Dendrochronology of oak: responses to climate 217 information contained in a tree ring series. In this study, the coupled analyses of time-independent and time-dependent responses of tree-ring growth to ... be also influenced by the ratio between earlywood and latewood, which usually decreases with age [48]. It was found that, in ring-por...

Ngày tải lên: 08/08/2014, 00:21

... the total number of inoculation points, as a large increase of blue stain- ing was observed in the sapwood with an increasing amount of inoculation points, at a density of ... inoculation points with Leptographium wingfieldii, a fungus associated with the bark beetle Tomicus piniperda, were inves- tigated in Scots pine (Pinus sylvestris). Durin...

Ngày tải lên: 09/08/2014, 04:20

... majority of sites having high intensity of tree infes- tation mainly along the main valley in the region. Lower elevations occurring in the southern part of region were often infested by I. duplicatus ... characterized by spruce yel- lowing and decline, what resulted in permanent sanitary felling providing good food supply for bark beetles. Control measures were done by using...

Ngày tải lên: 07/08/2014, 03:22

... situation in the codominant (main) layer while trees belonging to class 3 have slimmer stems. However, data indicate that a silvicultural intervention also in the main layer is needed in the ... in Fig. 3, where also linear trends are given. Trees with nearly the same dbh – but belonging to dominant/codominant trees – have significantly higher diameter increment that those belo...

Ngày tải lên: 07/08/2014, 03:22

... ground by a multi- disciplinary team including a sociologist, a linguist and a forester. e overall goal of this study was to find ways of improving the management of forests through a better integration ... included: – identifying the descriptors used by local villagers for non-agricultural lands; – explaining the classification units; – describing the vegetation and use of each unit;...

Ngày tải lên: 07/08/2014, 03:22

... stands by J (2006) at latitude 56–63°N in Sweden focused on site index conversion equations, an important role of soil inorganic stores ought to be taken into mind discussing the interrelationships ... Resources in Norway. Ås, Norwegian Institute of Land Inventory: 84. T B. (1977): Site index curves for Norway spruce. Med- delelser fra Norsk Institutt for Skogforskning...

Ngày tải lên: 07/08/2014, 03:22

... to determine bending strength (6 specimens in longitudinal direction, 6 in cross direction), 6 to determine density, 6 to determine moisture and in Variant 2, 6 specimens to determine shear ... its integral profile. e loading force acts with constant feed speed in the process of testing. e loading speed is such that maximal loading will be attained at (60 ± 30) s. Deflection in...

Ngày tải lên: 07/08/2014, 04:20

... necrotising in three lo- calities in Southern Poland characterised by indices of stems (I SN ), crowns (I CN ), and whole trees (I NWT ) necrotising are given for each age class in Table 3. In all ... evaluated by means of the index of the stem necrotising (I SN ), separately for each age class and generally for all age classes together. In the same way, we evaluated necro...

Ngày tải lên: 07/08/2014, 04:20

... stands in the period of spring snow melting. It is necessary to remind extremely high precipitation including above-average snowpack parameters in the winter period 2005/2006. If the spring ... like in March, also in April practically all water from melting snow in ltrated to the underly- ing rock. Only 16 mm water in spruce and 17 mm in beech flowed out in the form of ove...

Ngày tải lên: 07/08/2014, 04:20