Báo cáo khoa học: "Interpreting the variations in xylem sap flux density within the trunk of maritime pine (Pinus pinaster Ait ): application of a model for calculating water flows at tree and stand levels" pdf

... had a semi-cylindrical shape, and calculating the sap flux as the aver- age of the measurements made at a height of 6 m on a sample of ten trees at Car- rasqueira and ... the methods used for extrapolating sap flow data to estimate stand transpiration have remained rather empirical, with the capacitances in the water...

Ngày tải lên: 09/08/2014, 04:20

... frequency and lack of verb-based constructional contexts for EQUATIVE and TIME, as indicated in Table 2. Note that the test data set is the same for both sets of semantic relations, but that the training ... data in the case of 17 semantic relations will not con- tain any instances for the EQUATIVE and TIME re- lations, meaning that all such test instances will...

Ngày tải lên: 08/03/2014, 02:21

... the stand area. For the 21 and 26 year-old stands, stand foliage area was calculated as the sum of the leaf area of each tree; the latter was estimated by Figure 2. Estimated branch needle area ... trees and stands Table V. Summary of the stands characteristics and LAI (leaf area index) per stand and needle age as calculated using the crown level leaf area...

Ngày tải lên: 08/08/2014, 14:21

... for water and alternates according to season- al and climatic fluctuations; ii), competition for energy and water decreases when tem- perature and rainfall increase. An alternative ... For β 1 (A) and β 2 (A) linear and quadratic interpo- lations are used. As indicated by the correlations be- tween the original variable...

Ngày tải lên: 08/08/2014, 23:22

... endurance. It was initially used as a suitable spe- cies for reforestation, as centuries of indiscriminate forest use led to the disappearance of the original Atlantic and Mediter- ranean stances, ... responses [3]. SA has also been described as being an endogenous signal for the activation of plant defenses during pathogen attack, mediating the oxidative burst that lead...

Ngày tải lên: 08/08/2014, 01:22

... Moreover, efficient transformation procedure will be advantageous for studying metabolic pathways and for validation of candidate gene approaches of quantitative trait loci required for marker-assisted selection. The ... pollination (X) of mother clones. J F. Trontin et al.Genetic transformation of maritime pine Original article Towards genetic engineering of maritime...

Ngày tải lên: 08/08/2014, 14:20

... [46]. Variability of morphological and anatomical traits in needles and cones was correlated with latitude/altitude in Moroccan maritime pine. Early studies of variation in morphological traits in ... Location map of the nine native maritime pine populations sampled in this study. Natural maritime pine variability in Morocco 89 Mediterranean populations. Con...

Ngày tải lên: 08/08/2014, 00:22

... variation and migration pathways of maritime pine (Pinus pinaster Ait. ) in the Iberian Peninsula, Theor. Appl. Genet. 100 (2000) 89–95. [42] Schnabel A. , Parentage analysis in plants: mating ... in a flat sandy region in the Castilian Plateau, central Spain (figure 1). The climate in this area is dry Mediterranean, with annual average rainfall and Figure...

Ngày tải lên: 08/08/2014, 01:21

... assimila- tion in forest tree species (Ericsson and In- gestad, 1988). In Australia, P fertilization of Pinus radiata increased stand biomass and the maximal rate of photosynthesis ... defined as the rate of photo- synthesis at ca = 150 Pa. The maximal rate of carboxylation (V c max ) was calculated according to Von Caemmerer and...

Ngày tải lên: 08/08/2014, 18:21

... was created using a combination of meteorological data (monthly precipitation and tem- perature) starting in 1881, and increasing atmospheric CO 2 concentrations. The model ... Coefficients a and b were determined separately for sessile oak and pedunculate oak. The Cd index was then calculated for each sample tree and used to com-...

Ngày tải lên: 08/08/2014, 19:21