Báo cáo lâm nghiệp: "Do trees use reserve or newly assimilated carbon for their defense reactions? A 13 C labeling approach with young Scots pines inoculated with a bark-beetle-associated fungus (Ophiostoma brunneo ciliatum" pptx

... dominant stand and the volume of dead trees is not included in the calculation. Stand density was calcu- lated according to standard mensurational practice from the ratio of actual basal area ... is the 6 th report on the production potential and stability of mixed forest stands in uplands. A mixed beech/larch stand that was established by...

Ngày tải lên: 07/08/2014, 03:22

... information on the given problems. Energy requirements were assessed on the basis of measurement and evaluation of electric input e influence of selected factors on energy requirements for plain ... of selected factors of energy require- ments at plain milling of beech wood on cutting input as well as on basic technological parameters v c...

Ngày tải lên: 07/08/2014, 03:22

... nutrient content of aboveground biomass of teak plantation in a tropical dry deciduous forest of Udaipur, Rajasthan, India. e nutrient contents in the total biomass of teak in the plantation ... involved. Plantation species of the genus Acacia, Pinus, Euca- Quantication of nutrient content in the aboveground biomass of...

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

... 2/0045/08, and by the Slovak Research and Development Agency, Contract No. APVV-0102-06. Changes in air quality in different phases of forest management process in a sub-mountain beech ecosystem (West ... ecosystem (West Carpathian Mts.) D. K Institute of Forest Ecology, Slovak Academy of Sciences, Zvolen, Slovakia ABSTRACT: We studied ai...

Ngày tải lên: 07/08/2014, 03:22

... The area is characterized by a subtropical climate and abun- dant rainfall throughout the year. Annual mean temperature is about 21.8 ◦ C. Annual mean rainfall is 2680 mm over last 30 years (Ex- perimental ... 707 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006051 Original article Nutrient dynamics in decomposing needles of Pinus luchuensis after typhoon disturban...

Ngày tải lên: 07/08/2014, 16:20

... of the trees at the treeline was similar to the subalpine level, and the correlations between the two chronologies consequently increased significantly. 3.4. Growth trends in dominant trees The ... argues in favor of the fact that the tree establishment, and more in general the forest dynamic, has been mainly controlled by human land-use (Fig. 6) and tha...

Ngày tải lên: 07/08/2014, 16:20

... 929 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006076 Original article Modelling dominant height growth and site index curves for rebollo oak (Quercus pyrenaica Willd.) Patricia A a * ,IsabelC  ˜  b , ... A dominant height growth model and a site index model were developed for rebollo oak (Quercus pyrenaica Willd.) in northwe...

Ngày tải lên: 07/08/2014, 16:20

... defense reactions? A 13 C labeling approach with young Scots pines inoculated with a bark-beetle-associated fungus (Ophiostoma brunneo ciliatum) Natacha Gu erard a, b , Pascale Maillard b * , Claude B r echet b , ... 601–608 Available online at: c  INRA, EDP Sciences, 2007 www.afs-journal.org DOI: 10.1051/forest:2007038 Original article Do trees...

Ngày tải lên: 07/08/2014, 16:21

... Map of projected canopy areas of the investigated Fagus crenata trees in the Naeba Mountains, Japan. The shaded canopies indicate the measurement trees. Table I. General characteristics of the investigated ... Adiku S., Kakubari Y., Influences of environmental factors on the radial pro- file of sap flux density in Fagus crenata growing at...

Ngày tải lên: 08/08/2014, 00:21

... original Propriétés des merrains affinés dans une solution d’enzymes naturels et destinés à la tonnellerie Benoit Jourez a *, Stéphane Charron b et Jean-Philippe Quin c a Centre de Recherche de la Nature, des ... par les objectifs dans respectivement chacune des classes. Cette sous-représen- tation indique la difficulté à échantillonner des merrains...

Ngày tải lên: 08/08/2014, 01:21

... availability. In this study we analysed the leaf traits and patterns of gas- exchange during the well-watered part of the growth season in mature trees and seedlings of three co-occurring Quercus ... However, in our case it seems that the interspecific differences in leaf life span show a smaller effect on the phys- iological differences at leaf level in...

Ngày tải lên: 08/08/2014, 01:21

... sub-tropical, with a mean annual rainfall and temperature of 1144 mm and 22 °C respectively. The trial was located at an elevation of 45 m on an east facing slope. Soil parent material is of aeolian ... important indicator of pulpwood quality. 3.7. The use of Canonical Variate Analysis to compare the properties between groups of variates Canonical Variate Analysis...

Ngày tải lên: 08/08/2014, 01:21

... In the perspective of the conversion of Norway spruce plantations, there is a need for foresters to assess the potential of the natural woody species regeneration. We studied 50 Norway spruce plantations ... natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils Bruno HÉRAULT a *, Dan...

Ngày tải lên: 08/08/2014, 01:22

... resistance to vapour pressure deficit in a Mediterranean oak forest * A Pitacco N Gallinaro Institute of Pomology, University of Padova, Via Gradenigo 6, 35151 Padova, Italy (Received ... 0.06). CONCLUSION The Mediterranean oak forest that has been investigated seems to dissipate most of the available energy as latent heat in the...

Ngày tải lên: 08/08/2014, 18:21