Báo cáo lâm nghiệp: " Dendrochronology of pedunculate oak (Quercus robur L ) in an old-growth pollarded woodland in northern Spain: tree-ring growth responses to climate" pptx

... mature oaks, all of them in La Isla, and 57 old -growth oaks, seven of them belonging to La Isla and 50 to Tragamón, were sampled for tree-ring analysis. Old -growth chestnut trees were not sampled ... com- plete pollarded woodlands. This work is a dendrochronological reconstruction of the management history in Tragamón, an old -growth oak wood- land located in...

Ngày tải lên: 08/08/2014, 00:21

... article Dendrochronology of pedunculate oak (Quercus robur L. ) in an old -growth pollarded woodland in northern Spain: tree-ring growth responses to climate Vicente ROZAS a,b * a Departamento ... responses of radial growth in pedunculate oak (Quercus robur L. ) to climate were investigated in an old -growth woodlan...

Ngày tải lên: 08/08/2014, 00:21

... cited daily values of 2–3 mm d –1 in oak [6, 10]. In this case, these low values could be attributable to the low LAI or eventually local dryness. Oak LAI is effectively lower than LAI of healthy ... with the closed chamber during 6 days in 2001 (lozenges and dotted line). Stand (triangles and heavy line) and herba- ceous (histograms) LAI seasonal dynamics are shown as well....

Ngày tải lên: 08/08/2014, 00:22

... Control). Evapotranspiration in a declining oak stand 621 was deficitary (–78 mm) in leafy period, in particular in May (–11.6 mm) and July (–32.5 mm). Rainfall interception (In %) during the leafy ... sessile oak stand with LAI of 3.3. The intra- and inter-annual variations, not always well correlated with LAI, probably result from (i) the type of rain and (ii) climatic c...

Ngày tải lên: 08/08/2014, 00:22

... moyenne annuelle des minimas absolus (TmA), sable total (ARE), limon total (LIM), argile totale (ARC), pH total H 2 O (PH), pH superficiel H 2 O (PHS), matière organique totale (MO), matière organique ... superficiel (PS), potassium échangeable total (K), potassium échangeable superficiel (KS), calcium échangeable total (Ca), calcium échangeable superfi- ciel (CaS), magnésium échangeable tota...

Ngày tải lên: 08/08/2014, 00:22

... arginine and proline can play an important role in freezing tolerance [38, 51]. In addition, the occurrence of soluble cryoprotective plant proteins in freezing- tolerant plants has been postulated ... determined an index of injury (I –30 ) in living bark tissue of 20-year-old pedunculate oaks (Quercus robur L. ) that had been manually and almost completely...

Ngày tải lên: 08/08/2014, 01:21

... of soil (Tables 2 and 3). e analyzed soils are shallow at high altitudes and moderately deep at lower altitudes, mostly medium- skeletal in their organic-mineral layers, and strongly or very ... while rainfall brings in considerable amounts of industrial pollution (M et al. 200 5). e research area also witnesses a periodical lack of rainfall, which may weaken the vi...

Ngày tải lên: 07/08/2014, 10:21

... containing browsed fir seedlings (Fig. 1). An analysis of the global level of brows- ing (grouping all types of regeneration) revealed that seedlings on South-facing slopes were browsed more intensively ... contrary, the analysis of the understorey just above the plot highlighted its importance at a more local scale. The dominance of fir seedlings taller than 30 cm was related...

Ngày tải lên: 08/08/2014, 00:21

... rainfall, steep slopes and fragile soil are characteristic, the establishment management practices for plantations in the initial years, including clearing of original vegetation, burning of ... Litterfall C inputs The measured annual aboveground litterfall fell into the range from tropical forests (0.9–6.0 Mg C ha –1 a –1 ) [9]. Mean annual C returns through aboveground litterfall...

Ngày tải lên: 08/08/2014, 00:22

... design allows us to channel through the planting bank the total rainfall of a bigger land surface than which we would obtain without using this technique. The scarce resources existing in the peninsular ... made following a triangular planting pattern, with a density of 600 seedlings per hectare. In January 2001 twelve plots of 20 × 25 m in surface were identi- fied, with a tota...

Ngày tải lên: 08/08/2014, 00:22