Báo cáo lâm nghiệp: "Within-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water status and plant hydraulic constraints" ppt
Báo cáo lâm nghiệp: "Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia)" docx
... the compensation of toxic in uences of manganese and mainly of aluminium. e low content of potassium also indicates the insufficiency of water regimen both in soil and in individual spruce ... seedlings were planted in the soil from the decomposing stand and compared with both yellowing and green seedlings planted in the soil from the beech stand (Table 8).Phenomena of decline in two spruce ... dominant role in the initial stages of needle yellowing.Most studies concerning the interaction of pol-lutant stresses and mineral nutrient concentrations reported effects on plant growth and...
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Báo cáo lâm nghiệp: "Genetic variation of Prunus avium in susceptibility to cherry leaf spot (Blumeriella jaapii) in spatially heterogeneous infected seed orchards" docx
... isnow increasingly planted in Europe, both in afforestation of abandoned farmland and enrichment of forests [26]. In Gali-cia (NW Spain) a long term breeding program for this specieswas started in ... suspected,since the infection of this disease occurs through stomata in early spring. Bud burst explained some of the variation in leaf spot incidence (17–65% of the leaf spot clonal variation ... North Spain, were grafted and planted in these two seed orchards. One hundred and twenty-nine clones wereinstalled in Areas in January 1998, whereas 80 clones were planted in Sergude in March...
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Báo cáo lâm nghiệp: "Within-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water status and plant hydraulic constraints" ppt
... 419–429© INRA, EDP Sciences, 2004DOI: 10.1051/forest:2004035Original articleWithin-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water ... sprucedepending on the level of irradiance and vapour pressure def-icit; (2) assess the contribution of the leaf water status and liquidphase conductance to the control of leaf conductance in relationto ... perturbations of liquid water transport [19].4.3. Leaf conductance modelThe model developed from the data obtained in 1997,accounting for the interactive effects of irradiance, VPD, and plant hydraulic...
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Báo cáo lâm nghiệp: "Age trends in genotypic variation of wood density and its intra-ring components in young poplar hybrid crosses" doc
... were planted in row plots, each containing four trees. Onesystematic thinning was carried out (by removing every second tree in a row) in 1995 at the Platon site and in 1996 at the Windsor and Saint-Ours ... density of individual and cumulated rings, minimum and maximumwood densities, ring width, and dry fiber weight of cumulated rings of poplar hybrids at the Saint-Ours site.hybrids for weighted and ... trends in variation among hybridsA significant effect (P ă 0.003) by hybrid cross was shownby the joint ANOVA for variation of mean and minimum wooddensities of cumulated and individual rings and...
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Báo cáo lâm nghiệp: "Genetic variation and genotype by environment interactions of juvenile wood chemical properties in Pinus taeda " pps
... traitscan be planted in different environments. Such informationwould benefit tree improvement programs of loblolly pine and the pulp and paper industry by allowing the selection and planting of suitable ... site, and blocks within site),γ is the vector of random-effects parameters including general com-bining ability (GCA) for female and male, specific combining ability(SCA), GCA by site interaction, ... grosseur du grain / lignine1. INTRODUCTIONGenetic improvement and intensive silviculture of loblollypine (Pinus taeda L.) have increased forest plantation produc-tivity significantly in the southern...
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Báo cáo lâm nghiệp: "Radial variation of wood density components and ring width in cork oak trees" pptx
... significantly in uenced by any of the studied sources of variation. 4. DISCUSSION In spite of the difficulty in identifying ring boundaries and the resulting necessity in many cases of cross-examinationwith ... the innermost rings and increasing it in the outwardrings. Until the beginning of cork extraction the accumulation of extractives should contribute to the higher density valuesfound in the innermost ... over 100 µm and attaining in large vessels values over 200 µm [25]. A smaller size for the radialwindows would lead to higher amplitude of the variation of densitywithin the rings and, therefore,...
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Báo cáo lâm nghiệp: "Climatic signal in annual growth variation of silver fir (Abies alba Mill.) and spruce (Picea abies Karst.) from the French Permanent Plot Network (RENECOFOR)" ppsx
... conifer-ous stands in the French Jura and in Switzerland [10, 39], in the Vosges Mountains [3, 4], in the French and ItalianAlps [19, 22,43], in Belgium Ardenne [37], in Czech Repub-lic [44] and in Germany ... Abies alba in winter [24], high temperatures dur-ing the winter period could play a positive role in improvingcarbohydrate storage and growth of the following year. Warm-ing in winter could ... observed in Finland [35, 36] and in Germany [50] where summer drought in uenced both late-wood width and cell wall proportion in latewood. In conclusion, annual growth variations of Abies alba and Picea...
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Báo cáo lâm nghiệp: "Genetic variation of wood density components in a radiata pine progeny test located in the south of Chile" pps
... oscillating pattern of variation. In their study of families of radiata pine established in several sites in New Zealand, Cown and Ball [8] also measured average ringdensity and determined that ... continuous line representing F = 1.56, and P < 0.05. (A) ED and LD; (B) EA, LA and LP.Genetic variation within ring wood density 113latewood), an increment in LD is related to a decrease in ... understanding the inheritancepattern of ring density components may help to define selectionstrategies aiming to increase the density of juvenile wood and simultaneously reduce the variation of...
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Báo cáo lâm nghiệp: "Genetic variation of Pinus pinaster Ait. seedlings in susceptibility to the pine weevil Hylobius abietis L." docx
... parasitaire1. INTRODUCTIONPlants usually show high genetic variation in plant suscep-tibility to insect pests [34]. This variation affects insect per-formance, insects commonly preferring plants ... R.,Nutrition and growth in newly established plantations of Eucalyp-tus globulus in northwestern Spain, Ann. For. Sci. 60 (2003) 509–517.[30] Namkoong G., Maintaining genetic diversity in breeding ... Particularly, theresin canals appearing in the bark of conifers constitute a phys-ical and chemical barrier to the insect, and the characteristics of those resin canals of Picea spp. have been...
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Báo cáo lâm nghiệp: "Allozyme variation of Pinus pallasiana D. Don in Natural Crimean populations and in plantations in technogenously-polluted areas of the Ukraine steppes" ppsx
... metallurgical plants in Europe. On the other hand, the plantations sampled in the Krivorozhjeregion are located on mining dumps, dealing with thermal treatment of iron-ore and metal smelting (K2), and ... Location of Black Pine natural stands and plantations exa-mined (see also Tab. I).392 I.I. Korshikov et al.As a result of the analysis of 9 enzyme systems in the pooledsampling of 429 P. ... (2004) 389–396© INRA, EDP Sciences, 2004DOI: 10.1051/forest:2004032Original articleAllozyme variation of Pinus pallasiana D. Don in Natural Crimean populations and in plantations in technogenously-polluted...
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