Báo cáo lâm nghiệp: "Structure and development of forest sta

Báo cáo lâm nghiệp: "Structure and development of forest stands on permanent research plots in the Krkonoše Mts" pdf

... 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 forest limit in diﬀ erent site, stand, air-pollution and ... ability in higher elevations and tolerates conditions in the ecotone of the upper forest limit, although its optimal growth and production is reached...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Regeneration of forest stands on permanent research plots in the Krkonoše Mts" pdf

... 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 forest limit, although its optimal growth and production is...

Ngày tải lên : 07/08/2014, 10:21

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

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

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Health status of forest stands on permanent research plots in the Krkonoše Mts" pptx

... 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 ... stands Dynamics of mean foliation of beech in beech stands on PRP 27–32 in the years 1980–2009 is documented in the Table 1. The developmen...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: " Long-term effects of CO2 enrichment on bud phenology and shoot growth patterns of Norway spruce juvenile tree" potx

... The beginning of the growing season was con- sidered as that date in spring when the mean daily temperature was higher than 5°C for five consecutive days (for comparison: May 2 in 1997 and ... acceleration of bud phenology result in prolonga- tion of the shoot growth period and in a subsequent enhancement of wood production (B 1994). e eﬀect of long-te...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Survival and growth of outplanted seedlings of selected tree species on the High Tatra Mts. windthrow area after the first growing season" pps

... (F- and P-values) of the effect of planting time and application of the fungal product Ectovit on growth characteristics of seedlings at planting time and after the first growing season on the research ... and pine seedlings in this experiment is not reliable because of different age and thus the size and quality of seedling types. For this reason, t...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Extent and distribution of beech (Fagus sylvatica L.) regeneration by adult trees individually dispersed over a spruce monoculture" ppsx

... valuable stands only in sections 1 and 2. In section 3 individual trees may be the central points for the transformation of the second successive forest generation. With spontaneous development ... regeneration density is reached under the crown of the tree in the fenced part. From the foot of the trunk there is a markedly exponential decrease in dens...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Productivity and cost of manual felling with a chainsaw in Caspian forests" pptx

... application of harvesting machines is a key component in the evaluation of management plans for the rehabilita- tion and utilization of Caspian forests (B et al. 2008). Due to the higher initial ... using manual harvesting systems have been conducted in harvesting planted pine stands in the south. K-  and S (1994) conducted a time study on a s...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest Badínsky prales" potx

... and the soil depth and it has almost a linear character in the mineral soil. e comparison of the amounts of explained variance (r 2 ) and the parameters of the linear and nonlinear (exponential) ... than by the reduction of root tips density. CONCLUSIONS The research of fine roots in the intermediate stage of a beech virgin forest conﬁrmed tha...

Ngày tải lên : 07/08/2014, 10:22

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Báo cáo lâm nghiệp: "rigins and diversity of the Portuguese Landrace of Eucalyptus globulus" doc

... in the Portuguese Landrace and, in combination with natural and artiﬁcial selec- tion, contributed to genetic diﬀerentiation since introduction. This suggestion is supported by observations of ... these regions had a minor contribution to the Portuguese Landrace. The relatively high level of genetic diversity (in cpDNA se- quence and nuclear SSR) found in the Portugues...

Ngày tải lên : 07/08/2014, 16:21

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