Báo cáo lâm nghiệp: "Horizontal structure of forest stands on permanent research plots in the Krkonoše Mts and its development" ppsx

... given site condi- tions and stand type. From the aspect of horizontal structure, during the small forest development cy- cle, the majority of the stands in national parks of the Krkonoše Mts. proceed ... 539 ment and to the documentation of a great impact of anthropogenic processes (mainly of air pollution and forest management) on the condition...

Ngày tải lên: 07/08/2014, 10:21

... beech) and spruce stands in the Krkonoše Mts. is described on the basis of evaluation of transition matrices describing the probability of a change in the assess- ment of defoliation of particular ... pollution impact on forest stands in the Krkonoše Mts. in the 1979 horizon. Opera Corcontica, 19: 79–94. (in Czech) V S. (1981): Health cond...

Ngày tải lên: 07/08/2014, 10:21

... ability in higher elevations and tolerates conditions in the ecotone of the up- per forest limit, although its optimal growth and production is reached in the conditions of the 5 th and 6 th forest ... dynamics of beech, mixed (fi r beech and spruce beech stands) and spruce stands, relict pine woods and stands in the ecotone of the upper...

Ngày tải lên: 07/08/2014, 10:21

... Scotch pine, silver birch and other tree species of different age and size. Within the forest cycle the Fig. 8. e natural layering of beech in the ecotone of the upper forest limit in the Krkonoše ... ability in higher elevations and tolerates conditions in the ecotone of the upper for- est limit, although its optimal growth and produc- tion i...

Ngày tải lên: 07/08/2014, 10:21

... sensitivity in un- certainty of the BEF by ignoring the uncertainty in stand age increased the error in young and old age-classes. Having the uncertainty in stand age included with the Monte Carlo ... 60% of constant intraplot resid- ual variance showed that the best way to increase the preci- sion of BEFs would be the reduction in error of the biomass a...

Ngày tải lên: 07/08/2014, 16:20

... (RWC a ) and inverse of osmotic potential at full turgor (Ψπ 100 ). The x- and y-coordinates of the first data point of the linear portion of the PV curve corresponded to relative water content at the ... as the main effects was used. The relationship between var- iables was assessed using the Pearson (r) coefficient, and considering the individual values of...

Ngày tải lên: 08/08/2014, 00:22

... estimate of gain for clonal selection using indirect method (9% instead of 11.5% – Tab. IX). Meanwhile, the lower estimate of gain slightly affects the final selection of the clone: in this sample (Tab. ... 0.5 and 2.0 m on the North face of each tree, in the sapwood. Two over bark measures with the Pilodyn were also recorded on standing trees at 1.3 m on th...

Ngày tải lên: 08/08/2014, 01:22

... 64–72 Zinc The contents of zinc are higher in the area of Jablunkov Pass than in the remaining area of NFR (Fig. 3). Its higher contents are evident in the upper - most mineral horizon along the ... Chromium is an exception with the highest contents found in the southern part of NFR. e medians of concentrations of elements in the forest floor of...

Ngày tải lên: 07/08/2014, 10:21

... trees in the first thinning and thinning intensities, taking account of economical factors [46, 51]. In Slovenia, selective thinning is the main type of thin- ning [34]. However, the thinning of ... again during the last thinning. In the T2, 258 crop trees were chosen in the first thinning, and only 62% of these trees were chosen again during the last thinning....

Ngày tải lên: 07/08/2014, 16:20

... for the modelling of autumn discoloration.  e length of the vegetation period was then assessed as the diff erence between the midpoints of autumn discoloration and spring fl ushing. As the ... University in Zvolen, Zvolen, Slovakia ABSTRACT: The effects of the within-trial spatial variation of environmental factors on phenotypic traits were studied in the...

Ngày tải lên: 07/08/2014, 10:21