Báo cáo lâm nghiệp: "Inventory of rodent damage to forests" docx

... is to survey the extent of damage caused by rodents to the regeneration of forest tree species in the Czech Republic and to demonstrate possible solutions of rodent damage. MATERIAL AND METHODS Study ... size of the debarked area, distance of the lower margin of the browsed area from the ground sur- face and percentage of the damaged circumference of the trunk....

Ngày tải lên: 07/08/2014, 10:21

... damage and branching in Nothofagus 109 of branch size found along most shoots of N. dombeyi exhibit high degrees of resilience to localised damage. On the other hand, compensatory responses to ... the parent shoot of the most proximal offspring shoot, (2) diameter of the thickest offspring shoot, (3) length of the longest offspring shoot, (4) number of leaves of the lar...

Ngày tải lên: 08/08/2014, 00:22

... DISCUSSION Analysis of the present stocking of forests of Norway spruce vegetation zone Actual stocking on PRP was analyzed in the for- ests of the svz in relation to the degrees of natural- ness ... objective of the care of forests of svz is to prevent the occurrence of the developmental stage “decline” on large areas. It is a desirable permanent (continuous) effect...

Ngày tải lên: 07/08/2014, 03:22

... factor in logging planning to help minimizing the total cost of harvesting and roading. e comparisons of different available methods to get optimum road spacing can be useful for planners to ... time prediction model was used to plot the total cost of travelling and roading costs per m 3 for the range of road spacings (Fig. 6). e minimum total cost of travelling and r...

Ngày tải lên: 07/08/2014, 04:20

... general lack of heteroplasmy and recom- bination. Its generally uniparental mode of inheritance makes it a powerful tool to elucidate relative contributions of seed and pollen flow to the genetic ... distributions, together with available palynological information, were used to infer coloni- sation routes out of the glacial period refugia [16]. The use of cpSSRs instead of P...

Ngày tải lên: 08/08/2014, 01:22

... Lengths of the shoots (consisting only of a bunch of primary leaves), of the tap root (TR) and of the three longest lateral roots (LR; as an assessment of the length of ... concentrations into the range of the best accuracy of the methods of analysis. Concentrations of K, Na, Mg, Ca and P were then measured with ICP-OES as descri...

Ngày tải lên: 09/08/2014, 04:20

... shows damage of 32% of individuals in the investigated area (open space 34% of damaged individuals, below the stand 32% of dam- aged individuals) whilst average damage in the CR is 21% of damaged ... methodology of forest inventory Table 5. Total damage to individuals in regeneration by game Species Totally Open space Under stand number of individuals/ha number of i...

Ngày tải lên: 07/08/2014, 03:22

... a total of 39 species depend on Norway spruce as their host (P 1995). Of a total of 111 bark beetle species known to occur in the Czech Republic (P, K 1993), a to- tal of ... population of Ips typographus – en- demic situation (Forest District Ostravice, CR) by evaluating a total of 1,536 spruce stems, the total length of which was 44,396 m. Of this,...

Ngày tải lên: 07/08/2014, 10:21

... affected by changes in land use. Conversion of other types of land to forest introduced carbon to the soil and litter of the forests, whereas conversion of forest to some other land type removed car- bon. ... the carbon balance of forest soils, we divided it into the compartments of the Yasso model according to the division of the steady-state stock in 1922 and used this...

Ngày tải lên: 07/08/2014, 16:20

... compaction of the surface layer, seem to be of minor importance for the pine weevil. There is often an accumulation of litter over time in scarified patches, which has also been shown to reduce the damage- suppressing ... because of the risk of overheating due to sudden exposure to solar radiation [1] and/or because of the greater risks of predation on this sub- strate....

Ngày tải lên: 08/08/2014, 01:21