Báo cáo lâm nghiệp: "Optimization of carbon gain in canopies of Mediterranean evergreen oaks " pps

... results in the light of some opti- Original article Optimization of carbon gain in canopies of Mediterranean evergreen oaks S Rambal C Damesin R Joffre M Méthy D Lo Seen 1 ... main goal of this study was to analyze the depth-distribution of leaf mass per area (LMA) measured in ten canopies of Mediterranean evergreen oaks, five...

Ngày tải lên: 08/08/2014, 18:21

... potentialities in terms of the size of the shoot they would eventually develop [1]. In the case of Nothofagus species, such potentialities vary following a distal-to-proximal decreasing trend in the ... for this study. In each of three independent blocks, 15 to 20 seedlings per progeny were arranged in rows within one plot (thus, a total of 45 to 60 seedlings per progeny w...

Ngày tải lên: 07/08/2014, 16:21

... soil drought on the rate of CO 2 assimilation and the amount of soluble and insoluble carbo- hydrates in leaves of 4-year-old saplings of Q petraea. The aim of these experiments was ... remained at levels close to those of control plants in lupin or grapevine (Quick et al, 1992). In contrast to starch and sucrose, a five- fold increase...

Ngày tải lên: 08/08/2014, 18:21

... part. Peeling and brows- ing are classified into one category. During fraying trees are damaged by antlers of ungulate game. e assessment of peeling and browsing intensity was carried out in two ... browsing of terminal shoot, by fraying or by peeling and browsing by ungulate game. Peeling and brows- ing of trees with dbh 7–11.9 cm were related to the inventory circle with the...

Ngày tải lên: 07/08/2014, 03:22

... were those growing into mineral horizons and con- taining an angle with the soil surface of less than 45 degrees; rooting depth of horizontal roots and total rooting depth; length of horizontal ... roots; incidence of malformation. e measured values were used to calculate the index of surfaces (Index p, Ip in the tables of results). e index of surfaces is calculated a...

Ngày tải lên: 07/08/2014, 04:20

... numbers of formed cells. The beginning of the longitudinal axial parenchyma formation was determined in young trees on May 14. In old trees this activity was seen a week later. The influence of ... the periodical sampling was performed in weekly intervals. In our research, the start of the formation of new early phloem cells was observed at the beginning of April. In...

Ngày tải lên: 07/08/2014, 10:21

... No. QH71296 System of evaluation of the impor- tance of socio-economic forest functions including criteria and indicators of multifunctional forest management. e structure of forest functions ... in uenced by the information environment in CR. e opinion on forest operation importance is though incompatible with the visitors’ opinion on the coverage of increased costs o...

Ngày tải lên: 07/08/2014, 10:21

... soil layer into account in evaluat- ing the emission of SOC-CO 2 , although the soil carbon in the deeper layer may be in uenced by global warming in the long term. Because the type of vegetation ... which increases in summer and decreases in winter [7]. Rainfall and soil water content also affect the soil respiration, as is seen in the suppres- sion of soil respiration by...

Ngày tải lên: 07/08/2014, 16:20

... application of the treatments, no difference in inter-row weed biomass was found between the mowed plots (M) and the control (V) (Tab. I). The applica- tion of herbicides in the beginning of the growing ... partitioning Variations in biomass partitioning were mainly associated to tree height (Tab. II). In the 2YS, plants decreased their allo- cation to roots and rapidly increase...

Ngày tải lên: 07/08/2014, 16:20

... Heart- wood has a negative in uence on the pulping quality increas- ing chemical consumption in pulping and bleaching, decreas- ing pulp yield and pulp brightness, and increasing process costs [20]. ... croissance de l’arbre / pâte à papier 1. INTRODUCTION The wood of Eucalyptus globulus Labill. is an important source of papermaking fibres in the pulp industry, combining first quality...

Ngày tải lên: 07/08/2014, 16:21