Báo cáo lâm nghiệp: "Variability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxon" docx

... traps give information influenced by mi- gration of beetles. CONCLUSIONS I. typographus remained dominant species on the majority of sites having high intensity of tree infes- tation mainly along ... understanding of bark beetles spatial distribution. It may be used for practical forest protection only as preliminary information. No environmental factor controlling observed...

Ngày tải lên: 07/08/2014, 03:22

... remarkable increase in wood density along the stem radius in all the models. In the CW zone, the increase is more distinct in the first 40 years of growth, then the wood density stagnates. In the other ... trend when density increases with the increasing percentage of compression wood in the sample. When there is 10% of compression wood i...

Ngày tải lên: 07/08/2014, 03:22

... stand-forming capacity of wild cherry as well as its capacity to keep its position in a stand. MATERIAL AND METHODS A large stand with wild cherry trees as a stand- forming species in the area of Demonstration ... broadleaves such as Quercus robur, Quercus petraea, Tilia sp. and Carpinus betulus (P 2007). Growth of wild cherry (Prunus avium L...

Ngày tải lên: 07/08/2014, 03:22

... soils under broadleaved tree species but also to refer to the likely patterns in selected soil properties among different soil units in silver birch (Betula pubescens Ehrh.) stands. In addition ... variation in an evaluation of the nutrient pools of organic layers and the mineral soil in forest stands dominated by silver birch. CONCLUSIONS Referring to properties of s...

Ngày tải lên: 07/08/2014, 03:22

... Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction wood V. G, H. V Faculty of Forestry and Wood Technology, Mendel University of Agriculture ... the compression strength of fresh spruce is (44%) higher than that of normal wood. e objectives of this paper are to find out the lim- its of compression...

Ngày tải lên: 07/08/2014, 04:20

... the current results of the evaluation of the degree of the beech bark necrotic disease in selected localities in Southern Poland. Be- cause of the absence of analogical investigations in Poland, ... 2/7004/27. Current state of beech bark necrotic disease in Southern Poland A. C, I. M Institute of Forest Ecology of the Slovak Academy...

Ngày tải lên: 07/08/2014, 04:20

... of Wooded Agricultural Lands Soil Conditions Towards a Restoration of Forest Soil Conditions. How does legacy of agriculture play role in formation of afforested soil properties? D. K, ... important soil- forming and even soil- creating factor of soil genesis being likely the oldest human-induced alteration of soil proper- ties. Even rather extensi...

Ngày tải lên: 07/08/2014, 10:21

... forest trees in Slovakia. Nauka za Gorata – Forest Science, 43: 29–36. SCHIEBER B., 2006b. Spring phenology of European beech (Fagus sylvatica L.) in submountain beech forest stand with various ... deciduous forest tree species (Carpinus betulus L., Fagus sylvatica L., Quercus dalechampii Ten., Tilia cordata Mill.) was studied in a submountain beech forest...

Ngày tải lên: 07/08/2014, 10:21

... each combination of plot and month. Annual leaf biomass was calculated by summing monthly leaffall. To quantify the phenological pattern of leaffall and the corre- sponding phenological structure of the ... 2006) Abstract – We monitored leaf biomass, seasonal changes in leaffall, and plot growth for 11 years post-thinning in a secondary deciduous har...

Ngày tải lên: 07/08/2014, 16:20

... edge of P-1). The regeneration of the stands is always natural (shoot + seedling); no planting was identified in the woodlots studied. Clearing, thinning of seedlings, early thinning and pruning were ... particu- larly concerning the density of the maintained standards, but were often in the framework of a cordial relationship. Cutting regimes in small forest 927 [20]...

Ngày tải lên: 07/08/2014, 16:20

... 10.1051/forest:2007029 Original article Variability in Populus leaf anatomy and morphology in relation to canopy position, biomass production, and varietal taxon Najwa AL A a ,NicolasM a,b , Reinhart C a * a University ... determines leaf display, leaf distribu- tion and canopy density, and therefore in uences light inter- ception [27]....

Ngày tải lên: 07/08/2014, 16:21

... trees in Southern and Northern Tragamón. Oak pollarding in 1806 affected the southernmost extreme of South- ern Tragamón, and the north-central area of Northern Trag- amón. On the other hand, oaks ... 300–399 and 400–499 years) and the mean distance between target trees and their nearest neighbours was calcu- lated within, and between, age classes. The null...

Ngày tải lên: 08/08/2014, 00:21

... 10.1051/forest:2005012 Original article Dendrochronology of pedunculate oak (Quercus robur L.) in an old -growth pollarded woodland in northern Spain: tree-ring growth responses to climate Vicente ROZAS a,b * a ... tree growth and cli- mate variables was investigated in Tragamón, an old -growth oak woodland in the Cantabrian lowlands,...

Ngày tải lên: 08/08/2014, 00:21

... to semi-arid regions [37]. Mature trees of Faidherbia albida are famous for their [19] Ismail A. M., Hall A. E., Inheritance of car- bon isotope discrimination and water-use ... A. , Loustau D. and Ferhi A. , Genetic and environmental determinants of water-use efficiency and car- bon isotope discrimination in forest trees, in: Sa...

Ngày tải lên: 09/08/2014, 04:20

... of the day. Variation in vapor deficit and irradiance explained only 33% of the variation of gs. No stratification could be shown in the crown at any time of the day. Soil ... In the pre-drought period, the stomatal response to air water vapor deficit and irradiance explains 52% of the total gs variation; gs decreases as D in...

Ngày tải lên: 09/08/2014, 04:20