Báo cáo lâm nghiệp: "Sexual reproduction in Populus I Some physiological and biochemical events of the progamic phase" pdf
Báo cáo lâm nghiệp: "Sexual reproduction in Populus I. Some physiological and biochemical events of the progamic phase" pdf
... (1983) Callose and determination of pistil viability and incompatibili-ty. Theor. AppL Genet. 67, 1-10 0Gaget M. (1988) incompatibility intersp6cifiquechez Populus: effet ... pollinicenzymes involved in pollen tube metabo-lism, such as ¡3-galactosidase. Its activitycould be the final result of a series of inter-actions started by initial ... P-Galactosidase of Lilium pollen. Phytochemistry 24, 1639-1643Villar M. (1987) Incompatibilit6 intersp6cifiquechez Populus: approches physiologique etbiochimique. Phi.D. Thesis, Universit6...
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Báo cáo lâm nghiệp: "Sexual reproduction in Populus II. Information molecules of the pollen grain" pptx
... implicated in interspecific incom-patibility of self-compatible species.Cellular localization and biochemical identification of pollinic molecules, likely tobe implicated in interspecific ... M.M. (1976) A rapid and sensitivemethod for the quantitation of microgram quan-tities of protein utilizing the principle of proteindye binding. AnaL Biochem. 72, 249-254Clarke ... attractive tool for overcoming inter-specific incompatibility in poplars.Sexual reproduction in Populus II.Information molecules of the pollen grainM. Gaget1M. Villar2C....
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Báo cáo lâm nghiệp:" Ring shake in chestnut: Anatomical description, extent and frequency of failures" pdf
... of Bedigliora and 86% for Brione) of all the ring shakes observed in green wood, while in the dried wood this proportion slightlydiminishes to 84% (81% for Bedigliora and 86% for Brione). The other ... develop during the drying-process, confirming previous observations performedby Fonti et al. [6].3.3. Shake distribution The analysis of the ring shake distribution according to the year of the annual ... Sum of all typologies.Figure 2. Overlay-form: the ring shake is due to the physicalseparation of the injured tissue and the cicatrisation tissue.Ring shake typologies in chestnut 407proceeding...
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Báo cáo lâm nghiệp: "Fertilization at planting impairs root system development and drought avoidance of Douglas-fir (Pseudotsuga menziesii) seedlings" pot
... littleinformation is available concerning the ability of field-fertilizedseedlings to avoid drought immediately following planting.This experiment was designed to examine the influence of ini-tial root ... also possible that the inherent variation in studying root proliferation relative to fertilizer placement in the field (i. e., precision of planting hole size, fertilizer depth,seedling placement, ... applyingCRF directly in the planting hole, such that nutrients arereleased in the immediate vicinity of the root system [2, 12, 14,23, 52]. However, fertilization in the planting hole may limitroot...
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Báo cáo lâm nghiệp: "Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia)" docx
... times). Significant differences were confirmed again, primarily in those variants of the pot experi-ment in which we compared yellowing spruce seed-lings planted in the soil with intensive impact ... Manganese is an essential element, it is however toxic in higher concentrations. Its mobilisation in- dicates disturbances of physiological equilibrium reflected in the changed ratio of this element ... radiation).Similarly, we recorded significant differences in another macroelement Ca, primarily in those vari-ants of the experiment in which we compared the seedlings planted in the soil with intensive...
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Báo cáo lâm nghiệp: "Species composition in low mountain beech (Fagus sylvatica L.) stands in the Bieszczady National Park under the global warming" doc
... that the total rise in temperature in the immediate vicinity of the Carpathians and Tatras in the course of the current warming process is typical of Central Europe. Between 1881 and 1990 the ... change in species composition in low mountain beech for-ests in the Bieszczady Mountains and to compare the current species composition with the species composition of primeval beech forests in ... However, the increasing share of beech, accompa-nied by a decrease in the share of fir, is typical of the natural seedlings’ tier, especially of the wild-ling. Nevertheless, it may not be unequivocally...
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Báo cáo lâm nghiệp: "Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects on cambioxylophagous fauna" docx
... “chemical thinning”. Relative to the conventional mechanical thinning, this technique is far less time and resource demanding (K 1968). In the past, arboricides were applied by paint-ing ... according to the needle year-class (%)Defoliation to the needle year-class (%)Sum of defoliation (%)Affected trees (%)Dead trees (%) I II I+ II+III Σ I I+II I+ II+IIIdefoliation of tree ... arboricides will require partial inspection of the occurrence of I. amitinus on the stems as well as on logging residues originating from thinning. P. chalcographus and C. abietis did not become...
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Báo cáo lâm nghiệp: "Timber harvesting in the ukrainian carpathians: Ecological problems and methods to solve them" ppsx
... determining the effect of a driving unit on soil are density of soil in the rut and its depth, which depend on the number of passages in the same track. Investigations included measuring the depth of ... without us-ing engineering structures and drainage and have rather large longitudinal inclines, which in most cases does not allow using them for the passage of wheeled machinery skidders and tractors ... Fig. 3.Intensity of rut formationFeatures of plots used as the proving ground for the investigation of rut formation are shown in Table 4. Results of the investigation and photographs of indi-vidual...
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Báo cáo lâm nghiệp: "Multiaged silviculture in North America" potx
... plantation forest model by much of the public, particularly in more developed regions. is is increasing the interest in multiaged silviculture in North America as in other regions of the world. ... species and where wind is the dominant disturbance regime. In the southeast, mixtures or pure stands of southern pines (Pinus taeda, P. echinata, P. palustris) can be managed in multiaged stands, ... O’H 2002) including initially removing a percentage of the volume, a “maturity selection” system that considered the financial maturity of indi-vidual trees (M 1941), and the “improvement...
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Báo cáo lâm nghiệp: "Available nitrogen in the surface mineral layer of Serbian forest soils" docx
... Ni-trogen mineralization, immobilization and loss, and their role in determining diff erences in net nitrogen production during waterlogged and aerobic incubation of soils. Soil Biology and ... subtraction of the initial content of available mineral N (for the anaerobic incubation of NH4+-N content); Ninitial‒ initial content of available mineral N (for the anaerobic incubation of ... of mineralized N (with and without subtraction of the initial mineral N forms) and the corresponding mineralization in- tensities that were not in correlation with biologi-cal parameters of...
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