Báo cáo lâm nghiệp: "Environmental control of CO assimilation rate and leaf 2 conductance in two species of the tropical rain forest of French Guiana (Jacaranda copaia D Don and Eperua falcata Aubl )" pdf

Báo cáo lâm nghiệp: "Environmental control of CO assimilation rate and leaf 2 conductance in two species of the tropical rain forest of French Guiana (Jacaranda copaia D. Don and Eperua falcata Aubl.)" pdf

... &Cowan I.R., eds.), Stanford University Press,Stanford, pp. 323 -351Environmental control of CO 2 assimilation rate and leaf conductance in two species of the tropical rain ... rain forest of French Guiana (Jacaranda copaia D. Don and Eperua falcata Aubl. )R. Huc1J.M. Guehl 2 1 Station de Recherches Forestières, INRA, BP 709, 97387 Kourou Cedex, ... 4.0mm !d- !. The mean height of the studied treeswas 3.6 m (J. copaia) and 2. 4 m (E. falcata) . In situ C0 2 assimilation rate (A) and leaf conduc-tance (g) were determined...

Báo cáo lâm nghiệp: "Environmental control of CO assimilation rates 2 and stomatal conductance in five oak species growing under field conditions in Greece" ppsx

... pressure, windspeed and wind direction. The soil belongs to soil brun Mediterraneantype and consists of sand and clay with pH(H 2 O)7.7 in the surface layer and 8.0 in deeper ... greatly increased and presentedhigher WUE. In all study species, the wateruse efficiency was not maintained constantduring the growing period and the gs wasmore affected by ... Rainfall occurred untilmid-June, after which there was almost no rain until the end of October; during thisperiod, soil moisture declined. The weather conditions during...

Báo cáo lâm nghiệp: "Environmental risk assessment based on semi-quantitative analysis of forest management data" pptx

... introducing the data and methodology used in the analysis, (2) developing and describing logistic regression models for three spruce-dominated regions in the West Carpathians,(3) discussing ... and 24 5 in the Orava region during the period 20 07 20 08.No ﬁ eld survey was carried out in the Low Tatras region. A linear discriminant model was designed using the Orava dataset to obtain ... in directions of the highest variability of site and stand conditions. Sample plots approximately 1 ha in size and rep-resentative of the surrounding forest stand were identiﬁ ed in each forest...

Báo cáo lâm nghiệp: " Genetic control of the time of transition from juvenile to mature wood in Pinus radiata D. Don" pdf

... repeatedly and economicallymeasured. The radial development of wood density components (ringwidth-RW, ring density-RD, minimum density-MINDEN,maximum density-MAXDEN earlywood density-EWD, and latewood ... boundary coincidedalmost exactly with the midpoint between average earlywood den-sity and average latewood density of the ring. Ring and latewoodboundaries assigned automatically by WinDENDRO ... wood tomature wood is completed, leading to a stable wood density in growth rings. Reducing the volume of juvenile wood wouldincrease the overall wood density and the quality of certainwood...

Báo cáo lâm nghiệp: "Online control of wood peeling process: Acoustical and vibratory measurements of lathe checks frequency" ppt

... realized dur-ing a short term scientiﬁc mission supported by the COST ActionE35. The authors are grateful to Dr. Martino Negri and Dr. SandakJakub for the development of the device used during ... packaging,new procedures should take place in the peeling industry toimprove the productivity, the yield and the quality of veneers.Some of the evolving technologies concern on-line diagnosis and ... microphone (±0 .25 dB between8 Hz and 12. 5 kHz) was fastened to the carriage in front of the cut-ting edge. This conﬁguration keeps constant the distance between the sound source and the sensor...

Báo cáo lâm nghiệp: "Genetic control of adventitious rooting on stem cuttings in two Pinus elliottii × P. caribaea hybrid families" pptx

... variances and frequency distribu-tions. The two families differed in their degree of inbreeding;hence, the importance of additive, non-additive and interactioneffects will vary in each family. Conifers ... outcrossing and tend to have high genetic loads. As a consequence, inbred indi-viduals often exhibit reduced vigour [46]. Inbreeding in the F 2 probably accounted for the lower rooting performance in ... but two clones (1 022 and 11 62) in the inbred F 2 familynever produced a rooted cutting in any of the three Settings.Analysis of variance for rooting percentage over the three set-tings indicated...

Báo cáo lâm nghiệp: "Experimental control in Weigela japonica of flower initiatiob" ppt

... number of nodes (from 1 to 4). The type of development of the axillarybuds depended upon their position on the shoot (Table II). The buds located at the base of the ramification ... ramification developed essen-tially as leafy shoots and the percentage of buds developing as reproductive axesincreased with the position of the buds. The optimum was observed for ... reproductive axes and the floral response decreased for later pruningtimes. In the second experiment, the pruningtreatments were applied to 90 -d oldshoots and carried out so as...

Báo cáo lâm nghiệp: "Correlative control of early stages of flower bud initiation in ’bourse’ shoots of apple (Malus x domestica Borkh. cv. Golden Deliciou" docx

... Facult6 des Sciences agronomiques, Gembloux, BelgiqueIntroductionA better understanding of flowering in fruittrees would be obtained if we could pre-dict where and when ... Consequently, although the start of floral initiation is rather accu-rately known in fruit species, soundinformation about floral induction and evocation is still lacking.As ... Correlative control of early stages of flower bud initiation in ’bourse’ shoots of apple (Malus x domestica Borkh. cv.Golden Delicious)J. EscobedoJ. CrabbéMorphog6n6se...

Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf

... The number of pine saplings between 0 .20 and 1.30 mheight was also recorded.3 .2. Site index and age of the stand3 .2. 1. Site index and age estimation for the inventoryplots The height of the ... the height of the tree at the end (H 2 ) and at the be-ginning (H1) of the five year period, as well as the differencebetween the age at the end of the period (T 2 ) and the age at the beginning ... semivari-ogram and the fitted spherical modelusing the weigted least squares(WLS) for the site index (SI) (a) and the stand age (b).Figure 4. Ordinary kriging prediction of the age of the stand obtained...

Báo cáo lâm nghiệp: "Reconstructing crown shape from stem diameter and tree position to supply light models. I. Algorithms and comparison of light simulations" doc

... excluded from the clump and measured as an individualtree (with an individual crown). In the study areas and first bufferspooled, a total of 1 1 82 and 177 crowns corresponding to 1 589 and 22 7 ... created around each study area. The first buffer area brings the surface area of Plots 1 and 2 to 2. 22 and 0.67 ha, respectively, and the second buffer area brings the surfacearea of Plots 1 and 2 ... is delimited by two sides and one elliptical curve. The lengths of the two sides are related to corre-sponding radii – which are defined at the height of maximum crownwidth and parallel to these...

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