Báo cáo lâm nghiệp: "The proposal of biotic hazard zones in selected spruce dominated regions in Slovakia" pptx

... 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 have ... 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 different overstory removal on planted spruce and several broadleaved tree species: Survival, growth and pine weevil damage during three years" pps

... denotes the number of livingseedlings (or number of living seedlings with herbivory) at the end of the experiments, and n is the number of planted seedlings at the begin-ning of the experiment. ... The influencefrom the insecticide treatment was minor. Therefore, during the conversion of Norway spruce monocultures into mixed species stands usingoverstories, the use of insecticides against ... on surviving Norway spruce seedlings (3.0 in the ranking system used), something which isalso in line with previous research [19]. About 85% survival was found in Norway spruce seedlingsafter...

Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx

... rearing.Laboratory rearing of I. typographus. e rear-ing cages were used for breeding of beetles on spruce bolts. Bolts were prepared from non-infested spruce logs 1 month prior breeding ... 25–30 29e amount of precipitation in July was low and the eﬀect of this fact we observed via continual dry-ing the trees in that time (with exception of several days in the mid of July when precipitation ... within and outside unmanaged and managed spruce stands after a stormfelling. In: KNÍŽEK M. et al. (eds), Methodology of Forest Insect and Disease Survey in Central Europe. Pro-ceedings of...

Báo cáo lâm nghiệp: "The influence of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae)" doc

... shortly prior to the beginning of rearing.Number and sex ratio of the F1 offspring were not identified in this study, because of the low number of emerged beetles in all treatments. ere were ... rearing of irradiated individuals, the rearing was done in large numbers of individuals and each dose was carried out in five replications. Ten irradi-ated or non-irradiated (control rearing) ... pro-portion of irradiated individuals of gypsy moth than non-irradiated individuals and thus eliminate the effect of their release. e forest insects live in much more complicated food chain than...

Báo cáo lâm nghiệp: "The use of silica sand in micropropagation of woods" pot

... Breeding Station of the Forestry Research Institute in Kostelec nad Černými lesy. Low pH and high levels of phytohormones can bear interesting results by cultures in vitro, especially in somatic ... 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 of 14 hours. After completion of the cultures, for ... and pH 4.5.RESULTSComparing cultures in sand and in agarAfter the completion of cultivation, it was de-termined that when using sand, the starting pH of 5.8 remained essentially unchanged...

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 incorporated into a depth of 3–5 cm to prevent the losses of fertilizing con-stituents due to the in uence of biotic and climatic factors. Calcic dolomite was applied in the form of sprinkling ... content of humus substances its reserve is optimum also in intervening strips (Table 8). An increase after the windrow spreading is minimum and statistically insigniﬁcant with the exception of ... (5): 195–208 201 of potassium. In spite of the increasing values of available potassium in soil the present state of the sorption complex is more or less hazardous. It is in an environmentally...

Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx

... most intensive above 30 ms–1 ; an increase in the value of the rake angle causes a decrease in cutting input. So, with regard to the acquired results of cutting input, in plain milling it ... 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 ... in cutting input will result in a decrease in production capacity. In conclusion it is necessary to state that the issue of plain milling of beech wood is very complex and in the context of...

Báo cáo lâm nghiệp: " The response of weevil communities (Coleoptera: Curculionoidea) to the altitudinal zones of beech stands" ppt

... cumu-lative variance of the data together (Fig. 1). It is also obvious in the declining character of the ratio of the researched species in investigated AZ (Fig. 2). Gradual in uence was also ... the study of curculiocoenoses was conducted. It was conducted in eighteen permanent research plots based in beech stands of the 3rd, 4th and 5th altitudinal zone in the regions of South ... (axis 1) explained 26.1%, axis 2 explained 68.5% and axis 3 explained 65.8% of total variability in the species data. 9.4% of total variability in the species data was explained by axis 1,...

Báo cáo lâm nghiệp: "The role of Hylastes cunicularius Erichson (Coleoptera: Scolytidae) in transferring uropodine mites in a mountain spruce forest" pptx

... parts of trunks of spruce trees holding traps, however, we did not record their development in those trees. In the study area, dispersing individuals of the beetle occur in high numbers in both ... 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 Europe ... of phoretic uropodine mites during dispersal in a mountain spruce forest, the following questions have been addressed: (1) what is the proportion of beetles vectoring uro-podine mites in...

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

... 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 ... digital terrain models of the stud-ied areas. e accurate data of the measured points (standing tree, ends of fallen trunk, etc.) using stakes of stable height create a network of points (Ranšpurk ... EIVs of phytocoenological relevés were calculated for this purpose in order to eliminate the in uence of the varying number of recorded species in the herb layer in diﬀerent years of the...

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