Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx
Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx
... inoculation of Ips typographus (L., 1758) to spruce trees under various levels of water stressM. T, O. NFaculty of Forestry and Wood Sciences, Czech University of Life Sciences ... RepublicABSTRACT: Manipulated experiments with males of Ips typographus (L., 1758) were conducted in spruce stands in north-western Slovakia. Some of trees were stressed by a lack of water caused ... behaviour of bark beetles on trees under various regime of water stress in declining spruce mono- cultures. Within the frame of which we focus on:– analysis of I. typographus attacks rate on trees...
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Báo cáo lâm nghiệp: "The influence of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae)" doc
... of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae)M. T1, J. V21Faculty of Forestry and Wood Sciences, ... SlovakiaABSTRACT: Irradiation experiments on Ips typographus (L., 1758) with doses of 15 and 30 Gy (cobalt 60) were con-ducted in 2006. e effect of irradiation on the mating behaviour and reproduction success ... however. We can conclude the doses of 15 and 30 Gy do not have a significantly negative effect on the behaviour of ir-radiated males in the preparation of entry holes and the creation of mating chambers....
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Báo cáo lâm nghiệp: "The use of silica sand in micropropagation of woods" pot
... was used in part as liquid with sand (25 cm3 sand + 20 ml solution), in part reinforced by heating 6g of agar in a 1 l medium. Cultures were incubated for 6 weeks with a daily lighting period ... substances. White silica sand marked PR 21 from the sandpit Provodín near Česká Lípa (http://www.pisky.cz) was used in laboratories of the North-Bohemian Museum in Liberec and later also of the Botanic ... hypothesis was tested for conformity of averages for pH 5.6 and pH 4.5.RESULTSComparing cultures in sand and in agarAfter the completion of cultivation, it was de-termined that when using...
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Báo cáo lâm nghiệp: "The root-plant ratio changes in the first growing periods of wild cherry (Prunus avium L.) plantations" pptx
... that the fine root ratio is stable at least in the first growing period of new plantation and the best growing plants have about the same fine root ratio as the poorly growing ones. Even the regression ... explaining 92% of the relationship.An adequate proportion of fine roots (thinner than 2 mm) in the root system is another important parameter of planting stock and thus the changes in the ... from the regression analysis.Our interpretation of the data is that the efficiency of root system in terms of plant growth remains stable at least in that first growing period of plant in the...
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Báo cáo lâm nghiệp: "The first reaction of soil mite fauna (Acari, Mesostigmata) caused by conversion of Norway spruce stand in the Szklarska Poręba For" potx
... occurrence of beech we can observe that on the converted plots the domination of Uropo-dina mites was increased and domination rate of Parasitidae mites was decreased. Similar results of the reaction ... reaction of this group of mites to increas-ing amount of broadleaves in tree-stands were presented in “common-garden” forest experiment (S 2007). The reaction to conversion of selected mite ... order mites.(2) e first reaction of Mesostigmata mites after starting of forest conversion was increasing number of species in the plots. On the plots with relatively close occurrence of beech,...
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Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts" docx
... were observed mainly in regions exposed to the heavy deposition e effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts.D. V1, ... scarification the top -soil horizons were moved into line windrows, which caused marked degradation of the soil environment. e present revitalization of the soil environment is based on the principle of ... matter.CONCLUSION In the course of large-scale scarification the top- soil horizons were moved into line windrows in the Krušné hory Mts., which caused marked degradation of the soil environment. e...
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Báo cáo lâm nghiệp: "The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia" pptx
... of biotic hazard zones in three spruce dominated regions in Slo-vakia;(3) Proposal of zone-specific forest protection mea-sures.Study regions ree regions with different kind of spruce decline ... Descriptive statistics of data on accidental felling of spruce (m3 of felled volume) used for the proposal of biotic hazard zones in three investigated regions Region Agent Year N Mean Min. Max. Med ... reporting system. Subsequently, we demonstrated its use in three spruce dominated regions in Slovakia, covering ap-proximately 70% of spruce forests of this country. Almost all declining spruce...
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Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx
... information on the given problems. Energy requirements were assessed on the basis of measurement and evaluation of electric input e influence of selected factors on energy requirements for plain ... of selected factors of energy require-ments at plain milling of beech wood on cutting input as well as on basic technological parameters vc and vf, and on the tool angular geometry of ... the question of energy intensity (G 2008) of produc-tion has come to the fore. Milling as one of the basic and widespread methods of wood-working strongly depends on electrical energy. Annual...
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Báo cáo lâm nghiệp: " The response of weevil communities (Coleoptera: Curculionoidea) to the altitudinal zones of beech stands" ppt
... System.e response of weevil communities (Coleoptera: Curculionoidea) to the altitudinal zones of beech standsJ. BFaculty of Forestry and Wood Technology, Mendel University of Agriculture ... is impossible to define the outline of the occurrence of the found spe-cies. Many faunal researches suggest the possibility of the occurrence of most of the species, however, often in completely ... to complete the stand characteristics of selected geobiocoenoses with more zoocoenological data and to review the influence of AZ on the occurrence of weevils, therefore to add knowledge of...
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Báo cáo lâm nghiệp: "The role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forest" pptx
... importance of the passive transfer of uropo-dine mites assisted by H. cunicularius cannot be overlooked in mountain spruce forests in the Tatra Mountains and, possibly in other mountain areas in ... e role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forestB. K, P. Z, J. K Department of Animal Ecology, Institute ... of Forest Ecology, Slovak Academy of Sciences, Zvolen, SlovakiaABSTRACT: e bark beetle Hylastes cunicularius was studied in the Tatra Mountains, West Carpathians, to clarify its role in transferring...
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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
... reactionNutrients0.3–0.6–1.01.0Fig. 2. Relation between the proportion of Picea abies and other variables including EIV (CCA with the proportion of Picea abies as the only environmental ... based on comparing the composition of herb species within three groups of relevés. e groups are created with reference to the proportion of Picea abies in tree layers on the sampling plot. ... Shannon-Wiener index, together with the increasing proportion of Picea abies is also proved by the correlations in ordination analysis (Fig. 2).e permutation test suggested to take into...
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Báo cáo lâm nghiệp: " The influence of different overstory removal on planted spruce and several broadleaved tree species: Survival, growth and pine weevil damage during three years" pps
... 10.1051/forest:2005015Original article The influence of different overstory removal on planted spruce and several broadleaved tree species: Survival, growth and pine weevil damage during three years Magnus LÖFa*, ... herbivory from Pine weevils on early growth and survival in different tree species. Sec-ondly, to compare the long-term effects of different overstory densities on the survival, growth and wood quality ... temperature and pine weevil damage when experiments have been made close to forestedges [16]. The pine weevil may feed on fresh coniferous twigs,in the crowns of coniferous trees and on living tree...
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Báo cáo lâm nghiệp:"The influence of microclimate and tree age on the defense capacity of European beech (Fagus sylvatica L. ) against oxidative stress" pps
... H., Seasonal variations of glutathione reductase and glutathione in leaves and leaf buds of beech trees (Fagus sylvatica L .) , Phyton 32 (199 2) 99–102.[31] Polle A., Rennenberg H., Photooxidative ... 10.1051/forest:2003005Original article The influence of microclimate and tree age on the defense capacity of European beech (Fagus sylvatica L. ) against oxidative stressGerhard Wiesera*, Karin Heckeb, ... (gH2O ), and CO2 concentration in the mesophyll internal air spaces (Ci) in leaves of seedlings (located in the sun and shade crown of adult trees) and adult Fagus sylvatica treesin response...
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Báo cáo lâm nghiệp: " The influence of drought and thinning on leaf area index estimates from canopy transmittance method" pdf
... LAI estimates (Bur-ton et al, 1991). Recently, starting from the assumption that the total amount of radiationintercepted by the canopy layer of a standdepends on the ... only the struc-ture and the development of the stand(growth of the understory, natural regener-ation, etc) but also light and rain interception,vertical variation of temperature, ... the wet siteas a consequence of the longer period since the last thinning. On the contrary, the dif-ferences in LAI values were higher in the wet site than in the...
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Báo cáo lâm nghiệp: "The influence of acid mist upon transpiration, shoot water potential and pressure—volume curves of red spruce seedlings" pot
... signifi-cant effect of acid rain /mist upon cuticlestructure and/ or resistance. The lack of The influence of acid mist upon transpiration, shoot water potential and pressure—volume ... expected to influence plant water status. This paperpresents some of the results of a detailedstudy of the influence of acid mist on the water relations of red spruce seedlings.Materials ... of water potential and tissue water relations in Sitka spruce trees measuredwith the pressure chamber. J. Appl. Ecol. 11,637-667Johnson A.H. (1987) Deterioration of red...
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