Báo cáo lâm nghiệp: "Variation of hydraulic conductance of under natural conditions some adult conifers" ppsx

... of water relations in trees. We present here some evaluations of hydraulic conductance of trees growing under natural conditions. Data were col- lected from different experiments ... Oeco- logia (Berlin) 66, 475-483 Variation of hydraulic conductance of some adult conifers under natural conditions A. Granier, N. Breda, J.P. Claustres F....

Ngày tải lên: 09/08/2014, 04:20

... of gL were most probably located in the soil-root compartment of the SPAC because no loss of hydraulic conductivity due to xylem embolism was detected in the crown of ... predawn, respectively; gl: whole tree apparent hydraulic conductance; gL: sapwood-area-specific gl; gs : stom- atal conductance for H2 O; K: hydraulic conductivity of a...

Ngày tải lên: 08/08/2014, 18:21

... comparison of size of conducting area (CA) in ageA comparison of size of conducting area (CA) in age classes and forest site types in view of occupied social class of tree position Fig. 2. e size of ... difference of areas of circles with radii R and r: P = π(R 2 –r 2 ) (cm 2 ) where: r – the radius of a circle to the beginning of early wood, R – the radius of a ci...

Ngày tải lên: 07/08/2014, 10:21

... Department of Forest Tree Breeding, Faculty of Forestry, Agricultural University of Cracow. Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions ... Poland 2 Department of Forest Tree Breeding, Faculty of Forestry, Agricultural University of Cracow, Poland ABSTRACT: e genetic variation in 20 provenances of Europ...

Ngày tải lên: 07/08/2014, 10:22

... progenies from a natural stand of Norway spruce. The relationships between density and MOE and MOR are well known [20]. Since the dependency of density on the me- chanical properties of wood often is ... orientation of the cellulose microfibrils in the S2 layer of the cell wall (MfA), has been shown to be an important trait characterizing wood stiffness in softwoods [2,4, 7, 9,29]....

Ngày tải lên: 07/08/2014, 16:21

... An investigation of hydraulic limitation and compensation in large, old Douglas-fir trees, Tree Physiol. 22 (2002) 763–774. [18] Medlyn B.E., Loustau D., Delzon S., Temperature response of parameters of a ... height-related hydraulic costs of water trans- port in Oregon White Oak trees, Funct. Ecol. 17 (2003) 832–840. [25] Porté A., Loustau D., Variability of the photosynthetic...

Ngày tải lên: 08/08/2014, 00:22

... analysis of variance based on these mor- phological criteria showed highly significant differences among trees for most of the traits with the exception of the number of whorls per tree, the number of ... length (LN) of 15.16 ± 3.30 cm, a needle width (WN) of Table III. Pearson coefficient of correlation between pairs of morphological traits determined for seeds, cones, wing...

Ngày tải lên: 08/08/2014, 00:22

... approximately 4% of dry weight. Methods Determination of soluble ellagitannins The concentrationof soluble ellagitannins ex- tracted from samples of each French oak stave and of each ... four trees of Q robur support those of Viriot et al (1994), which were taken from measurements of single trees of Q petraea and Castanea sativa. A high degr...

Ngày tải lên: 08/08/2014, 18:21

... to study the effect of leaf age on stomatal resistance and on the morphology of the leaf epidermis. Materials and Methods Study site: 2 stands of Q. petraea (Matt.) Liebl. in ... the ratio of real transpiration to potential (Pen- man) evaporation (TlETP) from 0 at bud burst to about 0.5 at the end of leaf growth and to 0.8 at the end...

Ngày tải lên: 09/08/2014, 04:20

... the effects of the choice of the auxiliary variable, of the deletion of segments, and of the stratification of the tree crown on the sampling error were analyzed. In the analysis, trees of three ... 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...

Ngày tải lên: 07/08/2014, 03:22