Báo cáo lâm nghiệp: "Infra-red images of heat field around a

Báo cáo lâm nghiệp: "Infra-red images of heat field around a linear heater and sap flow in stems of lime trees under natural and experimental conditions" doc

... better theoretical understanding of the relation between measurable parameters of the heat field and sap flow and for methodical aspects of sap flow techniques. 2. MATERIALS AND METHODS 2.1. Site and sample ... the stems by the linear heater was measured by thermocouples, installed in axial and tangential directions around the heater in different xyle...

Ngày tải lên : 08/08/2014, 01:22

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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

... Cermák J., Infra-red images of heat field around a linear heater and sap flow in stems of lime trees under natural and experimental conditions, Ann. For. Sci. 61 (2004) 203−213. [19] Pickard W.F., ... accepted 22 February 2006) Abstract – This contribution aims at improving the understanding of sap flow measurements in trees. Infrared heat field image...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Predicting balsam fir growth reduction caused by spruce budworm using large-scale historical records of defoliation" potx

... not included in the model. Past- and cur- rent-year temperature and precipitation are examples of such variables that can explain a large part of the interannual varia- tion of ring width index ... First, a stand composition cri- terion was applied to limit the scope of this study to balsam fir stands, which were defined as stands composed of at least 50% of merchant- ab...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Using past growth to improve individual-tree diameter growth models for uneven-aged mixtures of Pinus sylvestris L. and Pinus nigra Arn. in Catalonia, north-east Spain" doc

... dbh, basal area, and total basal area of larger trees (thin lines indicate the standard error of the mean). Figure 2. Measured and predicted 10-year changes in the tree basal area (g) of living ... growth) of individual trees, the within-stand standard deviation of the growth ratio could be calculated. In the modelling data the mean within-stand standard deviation was 0.2...

Ngày tải lên : 08/08/2014, 01:21

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

... The co-inertia analysis was then run on the CA of faunal data and the PCA of environmental variables to (i) isolate new axes in both multidimensional spaces and (ii) create a factorial plane which ... oceanic with a mean annual temperature of +10 ◦ Cand a mean annual precipitation of 800 mm [19]. All stands were located on a plateau with more than 80 cm of loess as par...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: " Biomasse et minéralomasse d’un taillis à courte révolution de peuplier Beaupré installé sur un sol acide hors vallée, amélioré par fertilisation" ppsx

... sols : la granulométrie a été déterminée par la méthode Internationale ; le carbone organique par la méthode Anne (1945); l’azote organique total par la méthode Kjeldhal ; le ... discriminant le témoin des trai- tements. L’analyse d’un profil granulomé- Article original Biomasse et minéralomasse d’un taillis à courte révolution de peuplier Beaupré i...

Ngày tải lên : 08/08/2014, 18:22

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Báo cáo lâm nghiệp: "2 CO response curves can be a measured with field-portable closed-loop photosynthesis system" doc

... chamber air and ambient air exaggerating chamber leaks that are normally small. Leaks cause an underestimation of the assimilation rate, and consequently, an overestimation of ... measured after a 5 min equilibration at each C0 2 level, we conclude that the 2 methods are equivalent. Soybean leaflets are evidently able to maintain a quasi-stea...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "Essais d’utilisation d’un rugosimètre à palpeur pour qualifier des surfaces de bois" pps

... des cinq Rzi ; - R max : la profondeur maximale de rugosité, est égale au plus grand des R zi ; - RP : la capacité maximale d’aplanissement, est égale au plus grand des ... au grain 150 puis patiné à la main. Ces échantillons avaient préalablement fait l’objet d’un test visiotactile (MoTHE, 1985) qui avait conduit au classement suivant, par...

Ngày tải lên : 09/08/2014, 06:22

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Báo cáo lâm nghiệp: "Germination after heat treatments of Pinus tropicalis Morelet and Pinus caribaea Morelet var. caribaea seeds of west Cuban forest" potx

... (Rubiaceae), Mitracarpus glabr escens (Griseb.) Urb. (Rubiaceae) and Tetrazigia coreacea Urb. (Melastomataceae). P. tropicalis and P. caribaea var. caribaea selected trees were 25– 30 years old and all of ... by Curatella americana L. (Dilleniaceae), Amaioua corymbosa H.B.K. (Rubiaceae), Clusia rosea Jacq. (Clusiaceae), a dense herbaceous layer: Clidemia hirta (L.) D. (Melastomata...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Eﬀects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt

... development in spring. In- crease of heat in galleries may have accelerated the development and allowed larvae to enter winter at more advanced and resistant instars, then resulted in higher population ... trunk within cavities [1]. Adults and larvae undergo a pe- riod of summer dormancy during summer heat. Larvae located in galleries under the bark usually develo...

Ngày tải lên : 07/08/2014, 16:20

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