Báo cáo lâm nghiệp: "Coppice-with-standards in floodplain fo

Báo cáo lâm nghiệp: "Coppice-with-standards in floodplain forests – a new subject for nature protection" potx

... the already set principles and the floodplain forest was managed in the form of a composite forest with a rotation period of 35 years until 1950. In that year, however, a dramatic change in forest ... the Na- tional Forests set up a large pheasantry (1,340 ha) and due to the game management, the floodplain forest was classified as a special-purpose forest. is has brought...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx

... 3.78. Although the pH values measured in the plot are not available for the oldest mycorrhizal analyses (sampling in 1994) it can be supposed that a similar decrease in acidity could have had ... irregularly in the soil and may not be sampled appropriately. ese roots were therefore used as additional values for measuring the total weight of root dry matter. After analyses...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Variables inﬂuencing cork thickness in spanish cork oak forests: A modelling approach" docx

... under cork; g max : maximum basal area under cork; g dom : domi- nant basal area under cork; apb: area proportional to tree basal area; BAL: mean basal area of the trees larger than ith tree where ... variance associated with increasing classes of canopy cover, basal area and mean squared diameter and decreasing classes of stand density. This indicates that within plot tree variability in...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Evaluation of competition and light estimation indices for predicting diameter growth in mature boreal mixed forests" pdf

... trees experienced was greater. A considerable number of species demonstrated amensal- ism or neutralism rather than competition, and balsam poplar basal area was associated with increased aspen growth in the LFf ... natural origin boreal stands, this information is not available and must be estimated from the available data. We assumed that potential 480 K.J.Stadtetal. Table I. Convention...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp: " The management of snags: A comparison in managed and unmanaged ancient forests of the Southern French Alps" pot

... attracted attention of forest managers as a way to maintain biodiversity within forests managed for timber production [1]. Thus, maintenance of snags has become an integrated part of forest management ... in unmanaged forests, the degradation phase with gaps and regenerations, revealing an advanced break-down of old stand. All maps were incorporated into a Geographic Information S...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Variation in the composition and content of ellagitannins in the heartwood of European oaks (Quercus robur and Q petraea). A comparison of two French forests and variation with heartwood age" ppt

... per- centage of each ellagitannin was calculated in relation to total soluble ellagitannins. A nested analysis of variance was car- ried out on arcsine-transformed percent- age ... The variations in ellagitannin concentrations are illustrated in figure 2. The results indi- cate that as well as a general decline in ellagitannins, the individ...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: "Variability in density of spruce (Picea abies [L.] Karst.) wood with the presence of reaction wood" potx

... was calculated according to this formula: m w ρ w = – – – V w where: m w – sample weight at w = 0% and w = 12% (kg), V w – sample volume at w = 0% and w = 12% (m 3 ). To deﬁne the in uence ... sample. e samples from the CW zone which contained min. 25% of compression wood are marked as data ﬁle CW/CW in calculations. e average ring width in the sample was set...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societies" ppt

... represents, above all, a favoured area for leisure and relaxation. Inhabitants of mountain regions see it as protection against natural dangers and as a tourist attraction. Forest owners, farmers, and ... over increasingly large areas. In regions where oak and beech forests dominated, the coppice-with-standards system was a typical example of systematic management on a la...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Changes in Austrian pine forest floor properties in relation with altitude in mountainous areas" pdf

... takes up an approximately 4,000 ha area representing our study site, where the main tree species is black pine and which is managed under the administration of the Kaz Mountain National Park ... growth – nutrition relations along an elevational gradient of Scots pine (Pi- nus sylvestris ssp. hamata) forests at Türkmen mountain (Eskişehir, Kütahya). [Doctorate esis.] (In Turkish...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Changes in air quality in different phases of forest management process in a sub-mountain beech ecosystem (West Carpathian Mts.)" pdf

... Springer-Verlag: 11 1–1 21. GEROSA G., MAZZALI C., BALLARINDENTI A ., 2001. Techniques of ozone monitoring in a mountain forest region: passive and continuous sampling, vertical and canopy proﬁles. In: ... Towards the beginning of the new millennium, the situation began to change – with certain indicators manifesting an increase again. e contemporary causes, however, a...

Ngày tải lên : 07/08/2014, 03:22

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