Báo cáo lâm nghiệp: "Age trends in genotypic variation of wood density and its intra-ring components in young poplar hybrid crosses" doc
Báo cáo lâm nghiệp: "Age trends in genotypic variation of wood density and its intra-ring components in young poplar hybrid crosses" doc
... verified in future studies.The mean wood density of a ring is a composite of several intra-ring components, including wood density of early- and latewood and width of early- and latewood, that ... cumulated ring properties of poplar hybrids: (a) ring width and mean wood density, (b) ring width and minimum wood density, (c) ring width and maximum wood density, (d) mean and minimum wood densities, ... among-clone (genotypic) variation and repeatability of wood density and its intra-ring components at different sites, (2) examine the age trends in relationshipsamong wood density components, and (3)...
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Báo cáo lâm nghiệp: "Growth trends reveal the forest structure during Roman and Medieval times in Western Europe: a comparison between archaeological and actual oak ring series (Quercus robur and Quercus petraea)" pot
... secure a sustainable source of firewood, the structure of the remaining forests was often altered. Especially coppice of European oak became increasingly popular during theRoman era and the Middle ... processingTree-ring widths of the contemporary, archaeological and histori-cal wood specimens were measured to the nearest 0.01 mm using aLINTAB measuring stage and the TSAP-Win acquisition and ... withtree-ring series of wooden object from the 14th to 16th centuries[7, 8, 30, 31].Past interventions in forest or woodland structure are stillpreserved in the growth-ring patterns of wood specimens...
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Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands" potx
... (1) in managed forest stands changes occurred in element cycles and tree nutrition; (2) in managed stands heterogeneity of hu-mus forms and their properties have been changing, and (3) in ... an indicator of disturbed element cycles in forest ecosystems in spite of a decreasing air pol-lution load. Long-term changes in the quality and quantity of organic matter humification in forests ... spruce (Picea abies [L.] Karst.) is the main edificator and stand-forming tree species in mountain spruces stands of Central Europe. e timberline is running quite near the Praděd summit (about...
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Báo cáo lâm nghiệp: "A pheasantry as the habitat of small terrestrial mammals (Rodentia, Insectivora) in southern Moravia (Czech Republic)" doc
... out in 2002 to 2005. Small mammals were sampled using the standard method of line trapping by means of snap traps (P 1975) and combinations of snap and fall traps laid in the shape of ... herb stratum. ere were two lines of traps led in a trees cropping mast oak forest, one line in a young oak stand, one in a spruce forest, one in a pine forest and one at a forest edge. As ... variety of microsites. In HJ, all species of insectivores are missing. e absence of Crocidura spp. and M. musculus and A. microps shows obviously proves the absence of suitable open and synanthropic...
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Báo cáo lâm nghiệp: "Evaluation through a simulation model of nutrient exports in fast-growing southern European pine stands in relation to thinning intensity and harvesting operations" doc
... of percentage of trees removed and SG-ratio tested depending on thinning intensities for radiata pine and maritime pine.Pinus radiata Pinus pinasterIntensity of First thinning Second thinning ... logging residues due to thinnings and clear-cutting as a function of thinning intensity and site quality for radiata pine stands, in the case of conventional harvesting (no debarked wood) and ... removals and nutrient returns to soil as logging residues due to thinnings and clear-cutting as a function of thinning intensity and site quality for maritime pine stands, in the case of conventional...
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Báo cáo lâm nghiệp: "Designing decision support tools for Mediterranean forest ecosystems management: a case study in Portugal" pptx
... encompass the minimumnumber of years in a tree debarking cycle, the range of years in adebarking period and the number of levels of periodic land unit corkyield intensities. Again, in order to ... rotation age or cutting cyclebased on the interpretation of data from the land units. This interfaceis key for interactive definition of adequate cultural treatments in eachland unit in a Mediterranean ... Tomé M., inFlor, a Manage-ment Information System in Forest resources, in: Pukkala T.,Eerikainen K. (Eds.), Modelling the Growth of Tree Plantations and Agroforestry Systems in South and East...
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Báo cáo lâm nghiệp: "Age-related physiological and structural traits of chestnut coppices at the Castelli Romani Park (Italy)" pot
... decreased in the following years, being 7% of the initial value at the end of the time-rotation (30 years).Shoot DBH and DH increased linearly with the age (Fig. 3),being 1.0 ± 0.5 cm and 1.5 ... 11 in both YC and OC pointedout the good state of mineralization and humification processes in both stands. Moreover, some results underlined significant differencesbetween YC and OC stands, ... older cop-pices, in accordance with the results of Deweirdt and Carlier [16].The study of variations of leaf morphology in response tostand age and in two different periods of the vegetative...
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Báo cáo lâm nghiệp: " Predator/prey ratios: a measure of bark-beetle population status influenced by stand composition in different French stands after the 1999 storms" pps
... diversity index (SHDI) and catches of T. formicarius and of I. typographus; (b) arcsine-transfor-med proportion of pines (PROP_PIN) and catches of T. formicarius and of I. typographus; in a 500 ... formicariusclosely reflected that of its prey in all stands. We show that the proportion of pines within a 500 m radius is the main variable influencingpredator/prey ratios, and that this variable alone ... pines) than in GU and 2L, and allratios tend to increase with years (two-way ANOVA using arc-sine-transformed ratios of individual traps; there was no signi-ficant interaction of site and years)....
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Báo cáo lâm nghiệp: "Response to an ozone gradient of growth and enzymes implicated in tolerance to oxidative stress in Acer saccharum (Marsh.) seedlings" pot
... flush, consisting of preformed leaves and the second flush as neoformed flush consisting of neoformed leavesas described by Gregory [18].2.1.2. Harvesting of seedlingsSeedlings were randomly harvested ... tubes for 5 min in boiling water. The colorimetric determination of NO2−was done by mixing 0.25 mL of incubation medium with0.25 mL 0.02% N-(1-Naphtyl) ethylenediamine and 0.25 mL of sul-fanilamide. ... increasing, proba-bly due to the increase in the levels of NOx and VOC emis-sions [21]. Increase in global tropospheric O3concentrationduring the 21st century was projected by a range of...
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Báo cáo lâm nghiệp: "Ecological conditions influencing the localization of egg-laying by females of the cockchafer (Melolontha hippocastani F.)" pps
... ploughing, repair planting), presence of broadleaved species in the neighbour-hood, degree of weed infestation at the time of swarming and the final extent of plant losses after the end of white ... 1.3 4 Pinus, Tilia 20 ploughing Robinia in undergrowth yes 50224C11 3 4 Pinus 40 ploughing Robinia in undergrowth yes 100223D11-1 2 9 Pinus 10 ploughing none yes 100216C10 0.7 3 Tilia, Pinus ... total number of the entire period of swarming; in this time interval intensive egg laying into the soil could be assumed.Basing on records of daily temperatures meas-ured using the automatic...
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