Báo cáo lâm nghiệp: "Biomass increment and carbon balance of ash (Fraxinus excelsior) trees in an experimental stand in northeastern France" docx

... compared to wood biomass increment of beech trees of comparable diameter in an experimental stand (Hesse) in northeastern France [24]. Biomass increment and carbon balance of ash 579 layer to total ... 1.831–() +   = 577 Ann. For. Sci. 61 (2004) 577–588 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004053 Original article Biomass increment and carbo...

Ngày tải lên: 08/08/2014, 01:22

... ageing of cork oak stands, loss of cork quality [41], intense pruning [8] and increased cork oak decline (“seca”) [27]. Cork oak stands in Spain can be differentiated into open cork oak 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...

Ngày tải lên: 08/08/2014, 00:22

... 2.14344 deviation from 3 significant insignificant insignificant insignificant insignificant significant insignificant insignificant insignificant insignificant insignificant insignificant half-sum 8.85 7.15 9.73 ... 0.15 deviation from 0 significant insignificant significant significant insignificant significant insignificant insignificant insignificant insignificant insignificant insignificant acuteness (kurtosis)...

Ngày tải lên: 07/08/2014, 03:22

... with the degree of damage to underplantings by means of correlation matrices. RESULTS AND DISCUSSION Physicochemical properties of soils and nutri- ent status of forest stands on research plots From ... 149 derplantings increases with a decreasing content of these nutrients in needles. An opposite correlation was determined for aluminium: with an increasing proportion...

Ngày tải lên: 07/08/2014, 10:21

... mean height of individual Holm Tab le I. Mean and standard deviation (SD) of canopy height, number of stems and basal area for the 900 1-m 2 sampling points of the study plot, 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, where abandoned wo...

Ngày tải lên: 07/08/2014, 16:20

... Clément and Janin [5], the predominant occurrence of mineral inclusions in heartwood offers an objective standard to discriminate sapwood from heartwood rings, even in species with indistinct or ... pixels and minimum, maximum and average surface proportion (in %) of such pixels in the X-rays of 0.7 mm and 2 mm strips of trees I, II and IV (60 rings analysed per st...

Ngày tải lên: 07/08/2014, 16:20

... similarity in frost resistance of expanding current-year needles of the Canary Island pine and subalpine evergreen timberline conifers of continental Europe suggest that frost hardening 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...

Ngày tải lên: 07/08/2014, 16:20

... all surviving 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 an...

Ngày tải lên: 08/08/2014, 00:22

... in north-eastern France (plots and linear regression) and southern France (mean, standard deviation and confidence interval of the mean), and for the saplings of natural regeneration (plots and linear regression) ... per cent of global irradiance in southern France, Avignon) for the potted saplings in north-eastern France (plots and linear regression) and in southe...

Ngày tải lên: 08/08/2014, 00:22

... 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 first introduced by M. Zimmermann [43, 46] in view of relating the structure and physical properties of the water conducting system to plan...

Ngày tải lên: 08/08/2014, 01:21