Báo cáo lâm nghiệp: "Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental stand in northeastern France" docx
Báo cáo lâm nghiệp: "Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental stand in northeastern France" docx
... compared towood biomass increment of beech trees of comparable diameter in an experimental stand (Hesse) in northeastern France [24].Biomass increment and carbon balance of ash 579layer to total ... 1.831–()+=577Ann. For. Sci. 61 (2004) 577–588© INRA, EDP Sciences, 2004DOI: 10.1051/forest:2004053Original article Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental ... compared the annual biomass increment of ash trees to their annual carbon balance calculated from the end of thegrowing season in 1994 to the end of the next one in 1995. In 1995, three trees of variable...
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Báo cáo lâm nghiệp: "Modelling height and diameter growth of dominant cork oak trees in Spain" ppt
... ageing of cork oak stands, loss of cork quality [41], intense pruning [8] and increased cork oakdecline (“seca”) [27].Cork oak stands in Spain can be differentiated into open corkoak woodlands ... Mean, standard deviation and range of the main characteristics of the sample trees subjected to stem analysis in the two studied areas(CAT and PNLA).Area n Variable Minimum Maximum Mean Standard ... growth of dom-inant trees is used mainly to define the site index in even-agedstands and is one of the basic equations or submodels in growth and yield models [7, 31]. Another important submodel...
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Báo cáo lâm nghiệp: "Production potential and ecological stability of mixed forest stands in uplands – VI. A beech/larch stand on a mesotrophic site of the Křtiny Training Forest Enterprise" pot
... 2.14344deviation from 3 significant insignificant insignificant insignificant insignificant significant insignificant insignificant insignificant insignificant insignificant insignificanthalf-sum 8.85 7.15 9.73 ... 0.15deviation from 0 significant insignificant significant significant insignificant significant insignificant insignificant insignificant insignificant insignificant insignificantacuteness (kurtosis) 2.27 ... 2.77 2.34 2.16deviation from 3 insignificant insignificant insignificant insignificant insignificant insignificant insignificant insignificant insignificant insignificanthalf-sum 9.70 8.95 13.45 11.60...
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Báo cáo lâm nghiệp: "Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts" potx
... with the degree of damage to underplantings by means of correlation matrices.RESULTS AND DISCUSSIONPhysicochemical properties of soils and nutri-ent status of forest stands on research plotsFrom ... 149derplantings increases with a decreasing content of these nutrients in needles. An opposite correlation was determined for aluminium: with an increasing proportion of this element in nutrition ... limit of the lower optimum of 130 mg·kg–1. In the subsequent organomineral horizon (Ae/Ep) the values of Ca indicate the lower optimum reserves in the range of 80–160 mg·kg–1, and in 15% of...
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Báo cáo lâm nghiệp: "Canopy structure and spatial heterogeneity of understory light in an abandoned Holm oak woodland" pps
... mean height of individual HolmTab le I. Mean and standard deviation (SD) of canopy height, number of stems and basal area for the 900 1-m2sampling points of the studyplot, and mean and standard ... (tree- and shrub-dominated zones) are indicated on the map. Distances shown in the axes are in m.vegetation in many current Mediterranean ecosystems, whereabandoned woodlands and shrublands develop ... estimatedby quantifying some of these features and both theoretical and 752 F. Valladares, B. Guzmán and in the two zones of the plot by means of variograms, correlo-grams and interpolated maps using...
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Báo cáo lâm nghiệp: "Composition, distribution and supposed origin of mineral inclusions in sessile oak wood – consequences for microdensitometrical analysis" ppsx
... Clément and Janin [5], the predominant occurrence of mineral inclusions in heartwood offers an objective standardto discriminate sapwood from heartwood rings, even in specieswith indistinct or ... pixels and minimum, maximum and average surface proportion (in %) of suchpixels in the X-rays of 0.7 mm and 2 mm strips of trees I, II and IV(60 rings analysed per strip).0.7 mm 2 mmTree Min ... formation of mineral inclusions isinduced or increases when the main functions of the woodytissues shift from transport and storage of water, minerals and assimilates, as in sapwood and earlywood,...
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Báo cáo lâm nghiệp: "ce nucleation and frost resistance of Pinus canariensis seedlings bearing needles in three different developmental states" pptx
... similarity in frost resistance of expanding current-yearneedles of the Canary Island pine and subalpine evergreentimberline conifers of continental Europe suggest that frosthardening during sprouting ... resistance of needles in seedlings of P. canariensis in different stages of development:currently expanding, fully expanded, and 1 year old needles.Some seeds of P. canariensis may germinate in ... data analysisFrost resistance and ice nucleation were determined on 1-year-old,fully expanded and expanding current-year needles of 36 seedlings.The significance of differences between mean values...
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Báo cáo lâm nghiệp: "Nutrient status and field performance of tree seedlings planted in Mediterranean degraded areas" doc
... allsurviving seedlings, and measured stem height and root collar diam-eter on a randomly selected subset of 25 seedlings per site and species. 2.4. Leaf and needle sampling and analysis In July ... were mainly associated with PC2.Figure 2. Needle and leaf nutrient concentration in Pinus halepensis and Quercus ilex seedlings growing on soils developed from limestone and marl (mean and standard ... organic matter in Mediterranean-type ecosystems and global climatic change: a casestudy – the soils of the Mediterranean basin, in: Moreno J.M.,Oechel W.C. (Eds.), Global Change and Mediterranean-Type...
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Báo cáo lâm nghiệp: "Light acclimation and photosynthetic response of beech (Fagus sylvatica L.) saplings under artificial shading or natural Mediterranean conditions" docx
... in north-eastern France (plots and linear regression) and southern France (mean, standard deviation and confidence interval of the mean), and forthe saplings of natural regeneration (plots and linear regression) ... per cent of global irradiance in southernFrance, Avignon) for the potted saplings in north-eastern France(plots and linear regression) and in southern France (mean, standarddeviation and confidence ... relative irradiance (in per cent of global irradiance in southern France, Avignon) for thepotted saplings in north-eastern France (plots and linear regression) and southern France (mean, standard deviation...
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Báo cáo lâm nghiệp:"Water relations and hydraulic characteristics of three woody species co-occurring in the same habitat" pptx
... with a maximum in autumn and a minimum in winter (between January and March).Winter temperatures often fall below 0 °C and in the coldest month(January) the mean of the daily minima is, on average, ... architecture” of plants was firstintroduced by M. Zimmermann [43, 46] in view of relating thestructure and physical properties of the water conductingsystem to plant water balance and adaptation ... theenvironment. In this framework, the partitioning of thehydraulic resistances (R) along the plant body and theirseasonal changes are of particular interest and, in fact,Zimmermann and co-workers...
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