Báo cáo lâm nghiệp: " Effects of long-term water stress on net photosynthesis, growth and water-use efficiency of conifers in the field" doc

... sea-sonal and ontogenetic changes in the tissue -water relations of Acer, Populus, Tsuga, and Picea. Can. J. Bot 56, 635-647 Effects of long-term water stress on net photosynthesis, growth ... photosynthesis, growth and water- use efficiency of conifers in the fieldK. GrossInstitute of Silviculture, University of Freiburg, D-7800 Freiburg, F.R.G.Introduction Water stress ... Pham-Nguyen T. (1987b) The influence of constant long-term water stress on net photosynthesis and growth of youngspruces (Picea abies [L.] Karst) and Douglasfirs (Pseudotsuga...

Báo cáo lâm nghiệp: "Aboveground biomass relationships for mixed ash (Fraxinus excelsior L. and Ulmus glabra Hudson) stands in Eastern Prealps of Friuli Venezia Giulia (Italy)" pptx

... term in the original data, then predictions should be based on nonlinear functions[13, 18]. So, in the second step, the two parameters in equation (1) weredetermined performing a non-linear ... are the same of Table IV. SS is the sum of squares for error in arithmetic unit. In this case a and b and the coefficient of determination (R2) werecalculated using a nonlinear interpolation ... and SEE denote respectively the coefficient of determination, the standard error for the coefficients a and b and the standard error of the estimate for 38 (ash) and 10 (wych elm) degrees of...

Báo cáo lâm nghiệp: " Effects of water deficit on leaf in fast-growing tree species growth and initiation" docx

... initiation is important and, as demon-strated in Fig. 3, the initiation of newleaves at the apex of the dominant shootis restricted with developing water stress. Indeed, ... as the above. In orderto further our understanding of seedling growth, the early growth patterns of juve-nile E. globulus have been investigatedunder conditions of water ... as water stress developed and, after 10 d without water, were almost closed in the afternoon.Photosynthesis appeared to declinelinearly with conductance. In the longerterm,...

Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps

... dividing the runoff into components using the analysis of hydrograph by separation its recession limb and determining only the runoff con-stituents and their comparison also in the process of time. ... of runoff can be related to the loss and restoration of both interception and transpiration. On the other hand, the drainage-induced change led to different runoff situation persisting till the ... 307–313is considered as the amount of precipitation minus interception, in ltration, evaporation and storage losses (H 1988; K 1996).First, the effects of drainage treatment and stand growth...

Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot

... consumption of food in the creation of a fat body in females of Lochmaea caprae (L.) Differences of imagoes in the consumption of food in particular variants cannot be confronted with findings ... evaluation.RESULTSEffects on a nutritive plantA basic condition of the rapid increase in the nitro-gen content in birch leaves was demonstrated by the analysis of its level in the dry matter of ... nega-tive response induced by the nitrogen surplus when the content of nitrogen ions in the substrate probably acted as a stress factor causing the disturbance of the uptake of other nutrients...

Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf

... spruce stand (26.0) and in the organo-mineral horizon on the beech stand area. On the contrary, the highest value was found in the beech stand (27.3) in forest ﬂoor and in the spruce stand Ah ... air and partly also for water. In the mixed stand, the total reserve and structure of forest ﬂoor approaches stands with pure coniferous litter.CONCLUSIONWithin long-term monitoring in the ... in the broadleaved stand. e values of soil reaction also indicate higher acidity in the spruce monoculture than in the beech stand. Regarding the conditions of soil under the mixed stand...

Báo cáo lâm nghiệp: "Drought conditioning improves water status, stomatal conductance and survival of Eucalyptus globulus subsp. bicostata seedlings" ppt

... withholding irrigation (Fig. 6).4. DISCUSSION4.1. Preconditioning effects on physiology, growth and carbon allocationSeedlings of E. globulus subsp. bicostata exposed todrought preconditioning ... Plamondon A.P., Water stress preconditioning of black spruce seedlings from low-land and upland sites, Can. J. Bot. 72 (1994) 1511–1518.[59] Zwiazek J.J., Blake T.J., Effects of preconditioning ... preconditioning period3.1.1. Growth and biomass allocationDrought preconditioning reduced seedlings growth and modified most seedlings attributes. No interactions were de-tected, thus the three...

Báo cáo lâm nghiệp: " Effects of ectomycorrhizal inoculation and the type of substrate on mycorrhization, growth and nutrition of containerised Pinus pinea L. seedlings produced in a commercial nursery" docx

... 2. Effect of inoculation and the type of substrate on the con-centration of nutrients in needles of containerised P. pinea seedlings.p/v = peat/vermiculite (1:1, v:v); p/pb = peat/pine bark ... mL of the targetspore suspension of the corresponding fungus. The final inoculumconcentration was of 106 spores per seedling for M. ambiguus and 107spores per seedling for R. luteolus and ... containing the spores with the potting substrate to reach a final concentration of 107spores per seedling in both cases. For all fungi tested, the choice of the spore concentration was based on...

Báo cáo lâm nghiệp: " Effects of site preparation with micro-basins on Pinus halepensis Mill. afforestations in a semiarid ombroclimate" potx

... studied the correlation existing between the annual and the seasonal rainfall and the annual trunk growth, and the only correlation shown is that of the rainfall values in the springseason, there ... the lack of water, especially during the summer months [3, 10, 19,29]. This is the reason why the introduction of seedlings linkedto the site preparation focused on concentrating runoff water on the ... correlation between the growth of the rings and the rainfall in any other season or the annual total. Figure 6shows the relationship between these two variables; springrainfall and ring growth on...

Báo cáo lâm nghiệp: " Effects of intensive versus no management strategies during an outbreak of the bark beetle Ips typographus (L.) (Col.: Curculionidae, Scolytinae) in the Tatra Mts. in Poland and Slovakia" ppsx

... component in the spruce ecosystem, con-tributing in the replacement of senescent spruce stands. The decline of the beetle outbreak was probably due to the unfa-vourable weather conditions in the ... montagnes1. INTRODUCTION The Tatra Mountains are the highest mountain range in the Carpathian arch. They are located along the border betweenSlovakia (75% of mountain land area) and Poland (25% of area). ... during the culmination phase (1994–1997). Even if the progradationphase started earlier in Poland, the real beginning of the out-break (1994–1995) was related to the period of hot and dryweather...

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