Báo cáo lâm nghiệp: "The eﬀects of thinning treatments on density, MOE, MOR and maximum crushing strength of Pinus brutia Ten. wood" ppt

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. NFaculty 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...

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. T1, J. V21Faculty 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....

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...

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...

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,...

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. V1, ... 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...

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...

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...

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. BFaculty 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...

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...

Báo cáo lâm nghiệp: "The evolution of natural floodplain forests in South Moravia between 1973 and 2005" pptx

... In 1949, the Supported by the Ministry of Education, Youth and Sports of the Czech Republic, Projects No. VaV-SM/6/153/05 and MSM 6293359101.e evolution of natural ﬂoodplain forests in South ... relevés. The increasing trend in the number of recorded species may, however, also mean the movement of some of the ecologi-cal factors. In the case of floodplain forests, one of the most ... cam-pestre. e loosening of the canopy due to dying and fall of some of the large oaks is a condition crucial for the development of level 3. e increasing EIV for the light and moisture of the herb...

Báo cáo lâm nghiệp: "The eﬀect of diﬀerent stand density on diameter growth response in Scots pine stands in relation to climate situations" potx

... were included in the clusters together with trees from unthinned control plots 1c.Variability of growth response of pine stands to climate characteristic in relation to thinningVariability of ... thinned stands (variant 4t) showed the higher variability of diameter growth response in comparison with those from control stands. DISCUSSION e response of Scots pine to climatic conditions ... eﬀ ect of thinning on variability of diameter growth response in pine stands? In the Czech Republic, where pine stands take up 18% of the forest area, a relatively wide collection of long-term...

Báo cáo lâm nghiệp: "Interactive eﬀects of drought and pathogens in forest trees" docx

... approach has proved very interest-ing and useful in the case of complex decline syndromes wheremultiple abiotic (including drought) and biotic (pathogens and insects) factors are involved [80, 85,106, ... PROCESSES AND MECHANISMSTheoretically, three main types of drought- disease interac-tion can be expected:– A direct eﬀect of drought on pathogens; – Indirect eﬀects of drought on pathogens ... factor in the biocenosis, by reducing the biomass and modulating thespecies composition.4.3. Possible role of root pathogens in declinesassociated with drought The role of root pathogens in drought...

Báo cáo lâm nghiệp: "The contribution of remote sensing to the assessment of drought eﬀects in forest ecosystems" ppsx

... from the similarity of the detected changes with those caused by drought. This part gives an overview of the state of the art in the use of remote sensing for detecting and monitor-ing forest ... are: to brieﬂy review the existing sources of remote sensing data and their potential to detect drought damage; to review the remote sensing applications and studies carried out during the last ... ground assessment. Finally, the feasibility of depicting forest decline is closely dependingon the topography of the study area, on the structure of forest stands, on the date and frequency of data...

Báo cáo lâm nghiệp: "The eﬀects of thinning treatments on density, MOE, MOR and maximum crushing strength of Pinus brutia Ten. wood" ppt

... online at:c INRA, EDP Sciences, 2007 www.afs-journal.orgDOI: 10.1051/forest:2007024Original articleThe eﬀects of thinning treatments on density, MOE, MOR and maximum crushing strength of ... low. In addition, theseed source of samples taken from two plantations areas was Thinning eﬀects on Pinus brutia wood properties 475[33] Larson P.R., Wood formation and the concept of wood quality,School ... density [20]. Zobel and van Buijtenen listeda number of publications on the relationship between thin-ning treatments and wood density, and based on the generalconsensus concluded that wood...

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