Báo cáo lâm nghiệp: "Variations of construction cost associated to leaf area renewal in saplings of two co-occurring temperate tree species (Acer platanoides L and Fraxinus excelsior L ) along a light gradient" doc

Báo cáo lâm nghiệp: "Variations of construction cost associated to leaf area renewal in saplings of two co-occurring temperate tree species (Acer platanoides L. and Fraxinus excelsior L.) along a light gradient" doc

... 10.1051/forest:2005047Original articleVariations of construction cost associated to leaf area renewal in saplings of two co-occurring temperate tree species (Acer platanoides L. and Fraxinus excelsior L. ) along a light ... cost, CC) and morphological traits (biomass partitioning and leaf mass per unit area, LMA) to the cost associated with leaf area renewal (construction cost of the leafy shoot per unit leaf area, shoot ... GSF values were averaged over a period starting in May 1st and ending in August 31th.2.3. Sampling and analysisThirty saplings of Acer platanoides L. and 26 saplings of Fraxinus excelsior L. ...

Báo cáo lâm nghiệp: "Variations in growth and virulence of Leptographium wingfieldii Morelet, a fungus associated with the bark beetle Tomicus piniperda L" pot

... robur L. and Q. petraea[Mattuschka] Liebl .), birch (Betula pendula Roth and B. alba L. ) and hornbeam (Carpinus betulus L. ) but pines, essentially Scots pine(Pinus sylvestris L. ), have been planted ... tree and allowing the success of attacks,the fungi can also contribute to kill the tree by invading and occluding the sapwood [14, 24]. Artificial mass inoculations of bark beetle associated blue ... the variability in fungal growth and virulence, and to practical use of fungal growth on malt agar and in the phloem for screening and comparing the virulence of various isolates within the same...

Báo cáo lâm nghiệp: "Variations in seed and seedling responses to water stress in three provenances of Eucalyptus camaldulensis Dehnh" pptx

... Canberra, A UE:traliaIntroductionPrevious work (Bachelard, 1985, 198 6a, b; Gibson and Bachelard, 1987; Yang etal., 198 8) has shown that seeds and seed-lings of eucalypt ... seed and seedling responses to waterstress in three provenances of Eucalyptus camaldulen-sis Dehnh. A. GibsonE.P. BachelardDepartment of Forestry, Australian National University, ... initialestablishment and early growth of seed-lings from 3 provenances of E. camaldu-lensis were examined.Materials and MethodsThe 3 provenances of E. camaldulensis (Kathe-rine and Petford...

Báo cáo lâm nghiệp:"The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone" pdf

... classifiedas 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 ... secondary constituents of plants which include ellagic acid, gallica acid, allagatinnins,gallotannins, flavonoids and their polymers [10]. An increase in the presence of extractives tends to increase ... use of Canonical Variate Analysis to compare the properties between groups of variatesCanonical Variate Analysis (CVA), also known as lineardiscriminant analysis, was used to make comparisons...

Báo cáo lâm nghiệp: "Relationships between stem size and branch basal diameter variability in Norway spruce (Picea abies (L.) Karsten) from two regions of France" doc

... byLn(Dbg), where Ln is the natural logarithm.Lorraine trees were split into a calibration and a validation sub-sample by randomly allocating nine trees by stands to the calibrationsubsample. ... 2. 2). Validation sample : Residuals from the applica-tions of equation (2. 2) to validation trees. All residuals statistics are expressed in log units.Stand Calibration sample Validation sampleNumber ... branch basal diameter, tree size and stand parameters, whereas covarianceanalysis revealed significant random fluctuations among whorls and trees. Every third whorl branch basal diameter of...

Báo cáo lâm nghiệp: "Argan (Argania spinosa (L.) Skeels) seed germination under nursery conditions: Effect of cold storage, gibberellic acid and mother-tree genotype" docx

... Bani-Aameur F., Limitations actuelles de la productionet de la transplantation des plants d’arganier, in: Bani-Aameur F.(Ed .), Colloque International sur les Ressources Végétales : L arga-nier ... at 4 °C for at least one monthsignificantly led to a two- fold increase of germination attaining approximately 60% and a better control of dormancy. Indeed, averagegermination was even higher ... seedling number (GC) and number deteriorated seeds (RS) and dormant seeds (DS) for four cold storage duration and two gibberellic acid treatments (GA). Values are means of two replications of...

Báo cáo lâm nghiệp: "Physiological, morphological and growth responses to rhizosphere hypoxia by seedlings of North American bottomland oaks" potx

... Kikuzawa K (199 4) Effects of flooding on leaf dynamics and other seedling responses in flood-tolerant Alnus japonica and flood-intolerantBetula platyphylla var japonica. Tree ... maintained proportionately more leaf biomass than Q laurifolia and Q lyrata(table II). But Q lyrata and Q laurifolia main-tained proportionately more stem biomassthan Q ... stomatalconductance and transpiration measurementswere randomly taken for each treatment and species combination at 2 h intervals beginningat 0600 hours, and finishing at...

Báo cáo lâm nghiệp: "Variations clonales de l’aptitude du pin sylvestre à assurer le développement de Diprion pini L (Hym, Diprionidae) en milieu naturel" pdf

... isabellae Graells (Lep, Attacidae). J ApplEntomol 117, 248-256Géri C, Goussard F (198 8) Incidence de la photophaseet de la température sur la diapause de Diprion pini L ... évidenceavec la processionnaire du pin Thaumeto-poea pityocampa Schiff (Lep Thaumeto-poeïdae) et l espèce protégée Graellsia isa-bellae Graells (Lep Attacidae),expérimentées ... betweenreared insect and natural insect generations, the natural parasites and the distance between the lab and Cadouin. On the other hand, the real aptitudes of the clones in...

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

... Conclusion Tree species may react differently to ele-vated levels of atmospheric C02. In chest-nut trees, CO:2 fertilization was accompa-nied by a decrease in leaf area ... develop-ment and gas exchange of young poplars(Populus euramericana cv. 1 21 4). Oecol.Plant. 10, 95-10.’i leaf thickness. In the C02-enriched chest-nut plants, stomatal ... pattern of growththrough the vegetative development per-iod showed a tendancy towards fewerleaves and lower leaf area per plant afterJune in the C02-enriched plants....

Báo cáo lâm nghiệp: " Stand growth model using volume increment/basal area ratios" pot

... 197 6). In order to avoid the stand density effect, the ratio between stand total over bark volume increment (TVI) (m3/ha/year) and stand basal area (BA) (m2/ha) was calculated and used as a ... Plata, Buenos Aires, Argentina3Instituto Nacional de Tecnolog a Agropecuaria, Universidad Nacional de la Patagonia Austral – Consejo Nacional de Investigaciones Científicas y Técnicas, Santa ... the last twenty years were calculated to fit the model, using the ratio of total volume increment/basal area as an independent variable. e developed model gives a ratio between stand volume increment...

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