Báo cáo lâm nghiệp: "International Symposium “Forest soils u

Báo cáo lâm nghiệp: "International Symposium “Forest soils under global and local changes” Bordeaux" ppsx

Ngày tải lên : 07/08/2014, 16:20

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

... growth and production is reached in the conditions of the 5 th and 6 th forest vegetation zone. Development and dynamics of natural spruce stands are highly related to the altitude and site ... forming stands. In localities of large-area stand decline, the site conditions signiﬁcantly change and approach those of open space, which may lead to re-creation of even-aged stan...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Department of Forest Establishment and Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic" pot

... ected forest stands occur on strongly acidic, oligotrophic and highly water-permeable sites. –  e area is under permanent impacts of increased sulphur and nitrogen depositions and the soil acidiﬁ ... sulphur and nitrogen depositions in the open area (unstocked forest land) and their throughfall ﬂ ows Fig. 5. Annual acid depositions (hydrogen ions) in the open area (unstock...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf

... stand structure, and disturbance in boreal Newfoundland, Ecol. Appl. 7 (1997) 702–712. [36] Uuttera J., Maltamo M., Hotanen J.P., The structure of forest stands in virgin and managed peatlands: ... area corresponding to each age class and basal area class under periodic blocks (PB) and extended rotation (ER) methods for the studied pe- riod and the increment or loss under ER met...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Annals of Forest Science” takes a step further to enhance its impact!" doc

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Environmental control of CO assimilation rate and leaf 2 conductance in two species of the tropical rain forest of French Guiana (Jacaranda copaia D. Don and Eperua falcata Aubl.)" pdf

... control of CO 2 assimilation rate and leaf conductance in two species of the tropical rain forest of French Guiana (Jacaranda copaia D. Don and Eperua falcata Aubl.) R. Huc 1 J.M. ... to forest tree production under subequatorial climatic conditions are not well under- stood. Despite important annual precipita- tion, drought in the atmosphere and...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "Effect of stand segmentation on growth and development of Norway spruce stands" pps

... stem volume (m 3 ) Fig. 2. The values (mean and standard deviation) of stand volume (open triangles) and volume of mean stem (grey circles) of spruce stands in Machov experiment at the age of ... Stand volume in thinned variants 3 (track width of 5.6 m) and 4 (track width of 6.8 m) amounted to 451 and 469 m 3 per hectare, respectively. Mean stem in variants 3 and 4 reached 0...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Evaluation of twenty-years-old pedunculate and sessile oak provenance tria" doc

... the replication, provenance and localities on growth and stem shape of each provenance was tested on all plots. The results were evaluated and tested statistically and compared with the results ... values of height and breast-height diameter and diﬀ er signiﬁ cantly from the results obtained on the other plots. Table 9. Mean, minimal and maximal provenance tree height...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx

... GE and GC were expressed in absolute values (in %) and also by means of seasonal indexes (Š 1998), which standard- ise their course and eliminate the diﬀerences in the level of GE and ... diﬀerences and relative seasonal indexes). e results showed that GE and GC of short-term stored seeds were 59% and 92%, and 35% and 81% for long-term stored seeds. Compared to the...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx

... stem form of mountain and lowland Fagus sylvatica (D 2003), as well as studies concerning Picea abies stands which showed diﬀerences between mountain and lowland stands in respect of ... provenances and the index of stand density, obtained dur- ing this study, were not expected. Although there was a slightly positive correlation between the true form factor and the stan...

Ngày tải lên : 07/08/2014, 10:22

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