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Báo cáo lâm nghiệp: " The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance" pdf

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: " The effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundance" pdf

... stability as an intrinsic quality of forest e effects of cutting regimes on natural regeneration in submountain beech forests: species diversity and abundanceM. BInstitute of Forest Ecology, ... this in uence was found positive on plot M only.Fig. 5 illustrates the in uence of cutting on changes in the species composition of natural regeneration in comparison with the parent stand. ... group consisting of beech and willow. e results of ANOVA in Table 3 indicate a signifi-cant in uence of different cutting operations on the number of all regenerating individuals, of all indi-viduals...
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Báo cáo lâm nghiệp: "The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regeneration" pdf

... relativehumidity and in darkness, and then plantedagain in similar bags. The other half (controlplants) were maintained in the initial bags. The carbon dioxide <assimilation rate ... IndiaIntroductionArtificial forest stand establishment maybe achieved either with container-grownseedlings or with bareroot planting stock.Since growing seedlings in containersmay ... almost constant ci (Fig. 2), thusindicating that, despite the parallel evolu-tion of A and gs, the changes in Aweremainly due to an alteration of mesophyllphotosynthetic...
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Báo cáo lâm nghiệp: " The influence of Picea abies on herb vegetation in forest plant communities of the Veporské vrchy Mts" ppt

... diagnostic species and they play a key role in characterization and differentiation of the vegetation units. In this case they provide the comparison of units within the proportion of spruce. Bryophytes, ... persistence of beech dominated forest species and on the other CanopyLightPROPORTION OF SPRUCEContinentalityCover of herbsTemperatureNumber of species Shannon-Wiener indexMoistureSoil reactionNutrients0.3–0.6–1.01.0Fig. ... found by the com-parison of the EIV within relevé groups and correla-tions of variables in the CCA (Figs. 1 and 2).e most distinguished difference in the EIV oc-curred in soil reaction and nutrients,...
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Báo cáo lâm nghiệp: "The effects of flooding and Phytophthora alni infection on black alder" pps

... DISCUSSIONConfirmation of flooding and P. alni infection effects on black aldere analysis of covariance confirmed that the both factors (flooding and P. alni infection) and their combination significantly ... observation of J and B (2004).Differences among treatments in detailWhen the development of P. alni infection in the flooded and non-flooded condition was compared, the length of the stem ... flooding and non-flooding condition was Table 1. e effect of long-term flooding and Phytophthora alni infection on the development of black alder saplings Treatment per valid NLength of necrosis...
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Báo cáo lâm nghiệp: "The effects of thinning on the structural diversity of coppice forests" doc

... Montes et al.increases the illumination on the stems and in the case of Q.faginea this produces an intense sprouting from the stem,instead of the reoccupation of openings through the horizontalexpansion ... during the dry season. Due to the existence of these problems in exten-sive areas and to the increasing interest in the implementation of direct and indirect production uses for these stands (silvo-pastoral ... applied in assessing different types of diversity areas manifold as the ways of calculating measures of diversity. Furthermore, any diversity determination is relative to the con-ditions of the...
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Báo cáo lâm nghiệp: "The effects of lifting on mobilisation and new assimilation of C and N during regrowth of transplanted Corsican pine seedlings. A dual 13C and 15N labelling approach" docx

... seedling; () intact seedling. The different sampling dates were: at transplanting (day 0), at the beginning of root regeneration (day 13), and on days 27 and 41. The significance of the effects of ... concentration neither in seedlingsnor in their components. Time or lifting effects on C:N in the different seedling components were inversely related to those in N concentration.Total carbon ... limitation could be indirectly generatedlater in the growing season if the growth unbalance generatedTable II. Effects of lifting and time on changes in content and partitioning of total, old and...
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Báo cáo lâm nghiệp: "The effects of elevated CO 2 and water stress on whole plant CO 2 exchange, carbon allocation and osmoregulation in oak seedlings" docx

... in the chamber after the cessation of CO2 injection until the CO2 com-pensation point was reached. The incorporation of 13C into individual plant parts was determined12 ... concentrations. However,elevated CO2 concentrations often lead toreduced total mineral ion concentrations in the plant tissues (Conroy, 1992; Overdieck,1993). The responses of mineral ... the lack of growth response to elevated CO2 was in contrast with the stimulation in both A at the leaf and whole plant levels (fig 3) and the intensity of entry of...
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Báo cáo lâm nghiệp: "The effects of stock type and radicle pruning on blue oak morphology and field performance" docx

... including directly sownacorns, 4-month-old seedlings and 1-year-old seedlings. This project also examined the effects of trimming the radicles of ger-minated acorns on ... Protection Nurs-ery at Davis, CA, for planting into containers,while the third was directly sown in the field dur-ing the following week. The radicle pruning was done using ... center and planted. The plot was kept moderately weed-free dur-ing the course of the study using a combination of herbicides and mowing. Glyphosate was sprayed on the plot...
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Báo cáo lâm nghiệp: "The effects of summer exposure to ozone on the frost hardiness after the vegetation period of Norway and Sitka spruce seedlings" doc

... concentration of ozone using the same fumigation system. In this case,although there was no effect of the pollu-tant on the attainment of deep winter hard-iness, the ... assumed dead). The shoots + vials werethen autoclaved and the total conductivity (C-) of the solution determined. Based on the assumption that the rate of leakage of electro-lytes ... supported in part by the UKDepartment of the Environment, the Commis-sion of the European Communities, the NEForest Experiment Station of the USDA ForestService and the US...
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Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx

... the measurements aimed at the investigation of the in uence of the above-mentioned factors on cutting input.Machinery and toolExperiments were realized on a single-spindle drilling machine ... geometry of a milling machine in the process of plain milling. Another goal of the experiment was the determi-nation of bulk density of individual beech assort-ments and the comparison of results ... between cutting inputs in milling of beech wood with and without false heart is negligible.With the increasing feed speed, the cutting input also increases, as well as with an increase in cutting...
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