Báo cáo lâm nghiệp: "Ground based operation effects on soil

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 important consideratio...

Ngày tải lên : 07/08/2014, 03:22

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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, ... deletion 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

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Báo cáo lâm nghiệp: "Ecological and morphological notes on Notopygus bicarinatus (Hymenoptera: ichneumonidae)" ppsx

... the depth of 15 cm) was dug away and removed at these sites, followed by Ecological and morphological notes on Notopygus bicarinatus (Hymenoptera: Ichneumonidae) J. H 1,2 , K. H 3 , ... description, but wholly dis- agrees with monochromatic yellow pterostigma as mentioned by K (2002). e male cocoon is 9–12.5 mm long and 3–4.5mm wide, the female coco...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Linking intra-tree-ring wood density variations and tracheid anatomical characteristics in Douglas ﬁr (Pseudotsuga menziesii (Mirb.) Franco)" pot

... explains intra-tree-ring wood density change, and (2) sorting out tracheid anatomical characteristics in order of im- portance. The work was carried out with Douglas ﬁr (Pseudotsuga menziesii (Mirb.) ... between wood density and tracheid characteristics along a tree-ring, i.e. on intra- tree-ring variations. However, it is also interesting from these...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Leaf eating insect damage on diﬀerent poplar clones and sites" ppt

... leaf damage on 24 clones from Italy, Belgium and the Netherlands. Damage varied considerably, depending on the clones, sites, species and parental individuals. Clone’s ranks concord on the diﬀerent ... Key to the common parents: clones with the same mother: Mx; clones with the same father: Px; clones with the same mother and father: Mx + Px. Insect damage on...

Ngày tải lên : 07/08/2014, 16:20

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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

... 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

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Báo cáo lâm nghiệp: "Predicting the environmental thresholds for cambial and secondary vascular tissue development in stems of hybrid aspen" pptx

... 14-04-1999. The vertical and horizontal lines in the graph represent the threshold values for the accumulation of the indicated secondary vascular cell types. For periclinal divisions in the cambium, and ... estimated in the two direc- tions. In the first case, fusiform cells were counted along the radial files in the xylem portion of the cambiu...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Beech (Fagus sylvatica L.) – Technological properties, adhesion behaviour and colour stability with and without coatings of the red heartwood" ppsx

... (+6.1% for the modulus of elasticity and +7.09% for the bending strength). The swelling behaviour of the beech with red heart is slightly increased. The hygroscopic behaviour of the red- hearted ... determine the quantitative colour differences of normal and red- hearted wood and the behaviour of the colour differ- ence during xenon-arc exposu...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp:"Propriétés des merrains affinés dans une solution d’enzymes naturels et destinés à la tonnellerie" pot

... 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

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Báo cáo lâm nghiệp:"Stand history and its consequences for the present and future dynamic in two silver fir (Abies alba Mill.) stands in the high Pesio Valley (Piedmont, Italy)" potx

... 2003 DOI: 10.1051/forest:2003027 Original article Stand history and its consequences for the present and future dynamic in two silver fir (Abies alba Mill.) stands in the high Pesio Valley (Piedmont, ... RESULTS 3.1. Past land and forest use The forestry history of the high Pesio valley and the land- use of the territory...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "Carbon and nitrogen winter storage and remobilisation during seasonal flush growth in two-year-old cork oak (Quercus suber L.) saplings" pptx

... only one study investigated mechanisms of N storage and remobilisation in cork oak during winter and following spring [1] and none considered together dynamics of C and N during these periods. ... in content and partitioning of winter C and N in plants Winter C and N represent the amount of C and N assimilated during labeling time, part of which accu...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "DNA-based control of oak wood geographic origin in the context of the cooperage industry" ppsx

... conforming to a French origin. Each wood lot corresponded to all wood samples originating from one particular cooperage industry. Wood samples of known foreign origin were therefore included in some ... Sci. 61 (2004) 97104 â INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2003089 Original article DNA-based control of oak wood geographic origin in the context o...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Paramètres structuraux et/ou ultrastructuraux facteurs de la variabilité intra-arbre de l’anisotropie élastique du bois" pptx

... PRÉVISIONNELS DE L’ANISOTROPIE ÉLASTIQUE Valider la pertinence de la pyramide des modèles introduits au chapitre précédent pose deux classes de problèmes. Il con- vient, d’une part, de disposer de valeurs ... original Paramètres structuraux et/ou ultrastructuraux facteurs de la variabilité intra-arbre de l’anisotropie élastique du bois Daniel GUITARD,...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "doubling atmospheric CO concentration on 2 matter distribution and CO exchange of 2 yr growth, dry 2 old sweet chestnut trees (Castanea sativa Mill.)" pptx

... after a 2 wk adaptation period as the slope of C0 2 concentration over time in the whole chamber (Gaudillere and Mousseau, 1989). During the two 1 st 2 wk, the C0 2 concentration ... where environmental conditions were controlled (22 /15°C day-night, 15 h photoperiod, 50% RH). Whole plant photo- synthesis at 25 0 jlmol-m- 2 s- 1 PPFD...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: " Etude de la couronne de clones d’Hevea brasiliensis résistant et sensible à la casse au vent" potx

... morphogénétique de la couronne de clones d’Hevea brasiliensis résistant et sensible à la casse au vent (*) J.P. HOFMANN J.P. HOFMANN oratoire d’Amélioratio 1.N.I?.A., Lahnrntoire d ’A l1l élioratioll ... résistance à la casse au vent chez Hevea lmvsiliensi.s : étude morpho- génétique de la couronne et modèle de simulation de la...

Ngày tải lên : 09/08/2014, 06:21

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