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 (m 3 of felled volume) used for the proposal of biotic hazard zones in three inve...

Ngày tải lên: 07/08/2014, 03:22

... denotes the number of living seedlings (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 influence from the insecticide treatment was minor. Therefore, during the conversion of Norway spruce monocultures into mixed species stands using overstories, the use of inse...

Ngày tải lên: 08/08/2014, 00:21

... 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...

Ngày tải lên: 07/08/2014, 03:22

... 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 (c...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 03:22

... 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 3 rd , 4 th and 5 th altitudinal zone in the...

Ngày tải lên: 07/08/2014, 03:22

... 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, possibl...

Ngày tải lên: 07/08/2014, 03:22

... 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...

Ngày tải lên: 07/08/2014, 03:22