Báo cáo lâm nghiệp: "Water relations of oak species growing in the natural 2 CO spring of Rapolano (central Italy) " potx

... in diameter), situated 5 mm below and 10 mm above the heating device. Original article Water relations of oak species growing in the natural CO 2 spring of Rapolano (central ... osmotique et une diminution de la fraction d’eau * Correspondence and reprints growing in the CO 2 spring showed increased production of seconda...

Ngày tải lên: 08/08/2014, 18:21

... and inverse of osmotic potential at full turgor (Ψπ 100 ). The x- and y-coordinates of the first data point of the linear portion of the PV curve corresponded to relative water content at the ... 66–70%, HL2: 44–50%, LL1: 13.5–16% and LL2: 5–6% of full sunlight). Water relations of cork oak seedlings 379 of the water stress conditions was assured. Analysis of...

Ngày tải lên: 08/08/2014, 00:22

... longer in hydraulic continuity with the soil [5, 12] . In view of investigating possible relationships existing between changes in hydraulic resistance of plants and their adaptation to the environment, ... symbols indicate different species (see Fig. 7). The centre solid line is the linear regression and the curved dotted lines are 95% confidence intervals. The coeffi...

Ngày tải lên: 08/08/2014, 01:21

... with confidence in this paper the values of gL computed with the second technique. The changes in the flux/potential rela- tionships during the summer for one tree from the ... 1). The agreement between the 2 methods resulted from the linearity of the dF/Ψ leaf relation- ships (see fig 2) observed for most of the trees....

Ngày tải lên: 08/08/2014, 18:21

... within the area of interest. e nutrient content in the soil was determined in the upper humus layer (FH) and in the mineral soil (B) to a depth of 30 cm. A part of the samples was taken by the ... soils showing the insufficiency of main nutrients remain today as the main factor affecting the forest vitality. e situation in the soil is subsequently reflecte...

Ngày tải lên: 07/08/2014, 10:21

... to determine the number of specimens originating generatively in extensive polycormons. Fig. 4. Mean annual linear increment of terminal branches in Pinus pumila (Pall.) Regel in the period ... K 20 04). According to O and I (1984) the height of P. pumila generally depends on the intensity of prevailing winds which cause differences in the acc...

Ngày tải lên: 07/08/2014, 10:21

... while the field vole and common vole are much less harmful according to the foresters. However, this opinion concerning the significance of the individual species is in contradic- tion with the information ... stands 80 100 20 40 60 80 e nt of damage (% stands) 0 20 00 20 03 20 05 20 07 Ext e Year 80 100 20 40 60 80 e nt of damage (% stands) 0 20 00 20 03 20 05...

Ngày tải lên: 07/08/2014, 03:22

... obtained for Scotch pine and European beech, which questions the rank- ing of Scotch pine among economic tree species, at least in the examined territory. e low accuracy of determination of the ... significant increase in radial increment of Norway spruce in Austria in the period of 1961 to 1990, during which the length of growing season increased by 11 d...

Ngày tải lên: 07/08/2014, 10:21

... ranking the highest in adults and the lowest in the overwintering larvae. The SCP has proved to be a reliable index to estimate the cold hardiness of the beetle M. alternatus. The mean SCP of the ... 0.05). ThebarlineisS.E. Atlas of the People’s Republic of China, 20 02) . Therefore, the northern limit of the beetle distribution can be determined by ecolog...

Ngày tải lên: 07/08/2014, 16:20

... America [20 , 27 , 34, 42] , Europe [16, 25 , 33], and Asia [2, 28 , 37]. The first report of the disease in Spain, where A. alba reaches its SW distribution limit in Europe, was in 20 02 [22 ]. Previous ... G., Ecology and ecophysiology of circum-Mediterranean firs in the context of climate change, Ann. For. Sci. 59 (20 02) 823 –8 32. [4] Bannan M.W., Vertical resin...

Ngày tải lên: 08/08/2014, 00:22