Báo cáo lâm nghiệp: "Changes of partitioning and increased root lengths of spruce and beech exposed to ambient pollution concentrations in southern England" pdf
Báo cáo lâm nghiệp: "Changes of partitioning and increased root lengths of spruce and beech exposed to ambient pollution concentrations in southern England" pdf
... Changes of partitioning and increased root lengths of spruce and beech exposed to ambient pollution concentrations in southern EnglandG. Taylor1M.C. Dobson2P.H. ... evidence exists to suggest that drought may act as an incit-ing factor, accelerating the decline of forest trees exposed to chronic doses of air pollution. For instance, many ... that major increases in the de-cline of spruce occurred after hot and drysummers in Germany. Similarly, Ling and Ashmore (1987) suggested that for beech, loss of green...
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Báo cáo lâm nghiệp: "Changes in phenolic acids and stilbenes induced in embryogenic cell cultures of Norway spruce by two fractions of Sirococcus strobilinus mycelia" pot
... bark of Norway spruce contains more isorhapontin than astringin (Fig. 3). e rapid decline of the levels of glycosides was described in in vitro maintained excised bark discs of Sitka spruce ... control). e decline in the levels of isorhapontin and astringin continued 24 h after PF application representing less than 68% and 50%, respectively, of the contents determined in the control ... 12.20 mg protein g–1 mycelium fresh weight, according to assays following the method of B (1976) using bovine serum albumin as a standard. e final protein content of the intracel-lular...
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Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx
... pH–H2O is based on measuring pH of soil samples in water (five portions of water to one por-tion of soil); after 5 minutes of agitating and subse-quent standing for minimally two hours (not ... number of mycorrhizae proven in oak stands (P 2006) was statisti-cally proven in spruce mycorrhizae only in the total number of mycorrhizae (active and nonactive) in the sampling in spring ... analyses of the soil from the spruce stands in the Krkonoše Mts. in years 1980, 1993, 1998 and 2003 gave unsteady val-ues. In this period, pH markedly increased (from 3.59 in 1980 to 4.77 in 1998)...
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Báo cáo lâm nghiệp: "Changes in air quality in different phases of forest management process in a sub-mountain beech ecosystem (West Carpathian Mts.)" pdf
... MAZZALI C., BALLARINDENTI A., 2001. Techniques of ozone monitoring in a mountain forest region: passive and continuous sampling, vertical and canopy profiles. In: Proceedings of the International ... aim to obtain the required stocking density. e original forest cover at the site was a mixed stand consisting of beech (76%), fir (15%), oak (4%), and hornbeam (5%). Applying a series of cuts ... century (S et al. 2003). Towards the beginning of the new millennium, the situation began to change – with certain indicators manifesting an increase again. e contemporary causes, however,...
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Báo cáo lâm nghiệp: "Changes in the abundance of Melolontha hippocastani" ppsx
... years during swarming (2011–2012).We evaluated the correlation between the course of temperatures and the beginning and intensity of swarming of adults and discovered that adults of both ... after swarming in 2004 and 2008 will be clear after we obtain control results of the abundance of the 2nd instar grubs in 2010.Bulhary localityBulhary lies in southern Moravia in one of the ... fluctua-tions in the intensity of swarming were due to low evening and night temperatures (rain). During the entire period of swarming the males outnumbered the females (Fig. 3). In the subsequent...
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Báo cáo lâm nghiệp: " Changes of the mixed mountain virgin forest after 70 years on a permanent plot in the Ukrainian Carpathians" pps
... resistant to windstorm in the plot. On the contrary, spruce seems to be the species most susceptible to wind damage. Insect damage of spruce is, with respect to the small proportion of spruce in ... beech individual with 88 cm dbh reached 13.4 m3. The results of measuring lying deadwood show that beech is there apt to windthrow during strong winds.Fir – in 1934 the majority of fir individuals ... volume. Spruce – in 1934 the number of small spruce trees amounted to 25 trees/ha. Spruce regenerated mainly on the mineral soil – predominantly on windthrow mounds and pits. Individual spruce...
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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
... arethe 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 ... wood density and its variationwith height; (b) to obtain an equation for predicting wood vol-ume; (c) to obtain allometric equations for predicting total bio-mass and biomass of the different ... 0.16 and b = 2.34) and for Ulmus americana (a = 0.082 and b = 2.46).Leaf area index is lower than values reported by Kimmins[10] probably because of the high density of the stand and because of...
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Báo cáo lâm nghiệp: "Changes in carbon uptake and allocation patterns in Quercus robur seedlings in response to elevated an 2 CO and water stress: C 13 labelling" pps
... 12-hloading period; the five remaining plants wereour short-term 13C labelling and biomassresults pointed to a similarity in the patterns of C allocation to fine roots of ... proportion of newly incorpo-rated atoms relative to total atoms in a givensample, and is also interpreted as an index of Cturnover whereas %P describes the proportion of the ... to five unlabelledplants (to measure baseline plant 13C abundance).Plants were separated into leaves, stems, coarseroots (comprising mainly the tap root) and fineroots...
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Báo cáo lâm nghiệp: "Changes in endogenous cytokinins during flowering induction in Douglas fir: effect of exogenous applications N. Imbau" potx
... asfertilization, stem girdling, root pruning or root flooding, can favor flowering (Bonnet-Masimbert, 1982). Roots are also conside-red to be the major site of cytokininsynthesis (Kende, ... involvement of plant growth sub-stances (PGS) in flowering promotion in conifers was analyzed in relation to thelevel of gibberellins (Pharis et al., 1987).However, in ... treatments: areview of the possible mechanisms. For. Ecol.Manage. 19, 65-84Changes in endogenous cytokinins during floweringinduction in Douglas fir: effect of exogenous applicationsN....
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Báo cáo lâm nghiệp: " An for attempt at generating haploid lines of Poplar species genetic manipulation and breeding program" pptx
... oftenoccurs. The main objective is, therefore, to establish haploid cell lines of selectedPoplar clones from anthers which will thenbe regenerated into shoots and roots ... poplar organogenesis and regeneration(Wolter, 1968; Russel and McCown, 1988);5) transcription of desirable genes into poplar and increased recovery of transformed poplarshoots ... at generating haploid lines of Poplar speciesfor genetic manipulation and breeding programsK.E. WolterB.H. McCownDepartment of Horticulture, University of Wisconsin, Madison,...
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