Báo cáo lâm nghiệp: "Variation in wood volatile compounds in a mixed oak stand: strong species and spatial diﬀerentiation in whisky-lactone content" pptx

... threeecological zones: a small valley, a plateau and a regular intermediateslope. The plateau is covered by a well drained soil and composedof sand and slit. The small valley is characterized ... compounds in a mixed oak stand: strong species and spatial diﬀerentiation in whisky-lactone contentAndrei P a ,AlexisDb,RémyJ.Pb, Gérard Nc, Jean-Louis P a * a Unité ... extractive compounds of cooperage oak wood play an essential role in wine and spirits maturation in oak casks. They generally have low aroma thresholds so thattheir sensorial detection takes place...

Báo cáo lâm nghiệp: "Variation in wood properties among ﬁve full-sib families of Norway spruce (Picea abies)" ppt

... leading the project; TapioJärvinen, Tapio Nevalainen and Kari Sauvala for sample prepara-tion and determing MOE and MOR; Irmeli Luovula for analysing theFTIR samples; Åke Hansson and Örjan ... ex-tracted boards was treated as a covariate in all analysis of RW, LWP,density, spiral grain, MfA, MOE and MOR. Total mean, p-value and CV are reported.General mixed models for analysis of variance ... the boards wasmeasured by a protractor in degrees. The mean of the pith- and barkfacing readings was used in the analysis.Data analysisThe analyses of growth traits are here based on measurements...

Báo cáo lâm nghiệp: "Quality of wood in the stands of poplar clones" docx

... quality than class A1 and it starts al-ready with minimal diameter of logs 20 cm. Quality classes C1.1–C1.3 represent good quality, average quality and lower quality saw logs, and all have ... included in waste. In 2007 the standard STN 48 0056 was amended and traditional marking of the quality classes of logs used in Central and Western Europe was re-intro-duced as follows: A1 –I, ... have signiﬁcant systematic error and random error is as small as possible. e signiﬁcance of sys-tematic error was tested by means of t-test and the value of testing parameter t was calculated...

Báo cáo lâm nghiệp: "Variation of conducting area in stems of European larch (Larix decidua) growing in fresh mixed coniferous forest and fresh mixed forest sites" pdf

... ring.Total area of early wood rings within the sapwood zone constitutes the conducting area – CA. Mean area of early wood per single annual ring was deﬁned as the conducting area of a ring ... – CAar. Relative con-ducting area (CA.k–1) was calculated as a quotient of conducting area (CA) and total disc area (k). Crown volume of trees was calculated as an approxima-tion by calculating ... physiologically active sapwood zone rings of early and late wood are contained, the Variation of conducting area in stems of European larch (Larix decidua) growing in fresh mixed coniferous forest and...

Báo cáo lâm nghiệp: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx

... diﬀerences in the rate of height and diameter growth.e eﬀect of dbh and height on variation of stem tapering was eliminated by computing the relative tapering (equation 4). In this case the range ... factor as a dependent variable and the stand density (SDI), height (H), and diameter from height 0.05h (D0.05h) as independent variables.RESULTSVariation of breast height and true form factorsBreast ... 2005) was used. is index is a relative measure of density elaborated for even-aged stands, and it is determined on the basis of the number of trees per hectare (TPH) and the quadratic-mean dbh...

Báo cáo lâm nghiệp: "Intensively fertilised seedlings of the beech (Fagus sylvatica L.) for artificial regeneration of the spruce stands in the process of conversion" pdf

... nursery stock in Ireland and U. K. including nutrient reserve analysis in controlled-release fertiliser and leaf analysis. International Plant Propa-gators’ Society, Combined Proceedings, 46: ... were analysed in FGMRI laboratory in order to reveal root deformations in accordance to the valid standards of planting stock quality (ČSN 48 2215, 1998). e data were statistically analysed ... treatment (application of foliar nutrition only), they all achieved the parameters of established plantation in the same time interval (in 4th year after planting),– the equalisation of average...

Báo cáo lâm nghiệp: "Infrared images of heat ﬁelds around a linear heater in tree trunks: what can be learned about sap ﬂow measuremen" pptx

... heater along the axial di-rection, and an asymmetrical one with the upper end of thethermocouple placed at the same axial height as the heater and a lower reference, placed at a certain distance ... by infra-camera and measured between thesecond and third outer thermocouples of the radial sensor). and verification. Infrared imaging techniques have been used in [27] to demonstrate via an additional ... will remain also constant. The latter is usually applied in present heat probe sensors. A constant thermal energy inputhas an advantage with respect to variations of sap flow duringthe day in different...

Báo cáo lâm nghiệp: "Improving RBS estimates – effects of the auxiliary variable, stratification of the crown, and deletion of segments on the precision of estimate" pps

... within all main branches, which were considered as strata. Each path was terminated when a single leaf cluster occurred and the visually estimated leaf biomass was deﬁned as the auxiliary variable. ... decrease varied between 50% (European mountain ash) and 85% (old pine).Keywords: randomized branch sampling; multistage sampling; unequal selection probabilities; auxiliary variables; pps-samplingJ. ... population of paths of each tree (eq. [1]) and the true totals and variances of the target variables and the estimates of the totals, respectively.Choice of the auxiliary variable and variance of...

Báo cáo lâm nghiệp: "Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur" pot

... 333–339CORCUERA L., CAMARERO1 J.J., SISÓ S., GIL-PELEGRÍN E., 2005. Radial-growth and wood- anatomical changes in overaged Quercus pyrenaica coppice stands: functional responses in a new Mediterranean landscape. ... delicate balance: Impacts of diseases and insects on the health of California oaks. Fremontia, 18: 58–63.TERHO M., HANTULA J., HALLAKSELA A. M., 2007. Occurrence and decay patterns of common wood- decay ... with statistical soft-ware Statistica 6.0. Means and standard deviations were calculated for each characteristic within each species. Normality of data distribution was tested by Shapiro-Wilk...

Báo cáo lâm nghiệp: "Soil detritivore macro-invertebrate assemblages throughout a managed beech rotation" docx

... The co-inertia analysis was thenrun on the CA of faunal data and the PCA of environmental variablesto (i) isolate new axes in both multidimensional spaces and (ii) create a factorial plane which ... environmental variables). Envi-ronmental data were previously analysed with a principal componentanalysis (PCA) of a matrix containing 45 lines (sampling points) × 14columns (environmental variables). ... oceanic with a mean annual temperature of +10◦Cand a mean annual precipitation of 800 mm [19]. All stands were locatedon a plateau with more than 80 cm of loess as parent material. Soilsare...

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