Báo cáo lâm nghiệp: "Assessing the potential of natural wood

Báo cáo lâm nghiệp: "Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils" doc

... In the perspective of the conversion of Norway spruce plantations, there is a need for foresters to assess the potential of the natural woody species regeneration. We studied 50 Norway spruce plantations ... natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils Bruno HÉRAULT a *, Dan...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: " Relationships between browsing damage and woody species dominance" doc

... us, the same % damage to a monitored woody species is considered as high on one plot, and on the contrary, as small on the other plot. To assess the eﬀect of the species proportion on damage ... increases with the relative proportion of a species, in other cases it increases with the decreasing proportion of these woody species in advance regener...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Assessing the nutritional and climatic response of temperate tree species in the Vosges Mountains" doc

... can be considered as the empirical index that measures the efficiency of the ecological variables used in E for predicting the composition of the vegetation. The closer the eigenvalues of the m ... characterizing species presence/absence as a function of environment [4, 35]. The goal of logistic regressions was to define the environmental response of the...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Assessing the short rotation woody biomass production on marginal post-mining areas" doc

... production. e establishment of an economically reasonable land use system on such marginal sites is a challenge for farmers and foresters. In this context, the production of woody biomass for the ... supported by the fact that the hedgerows result in higher crop yields compared with conventional agriculture. Regardless of the economic assessment of the produ...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp:"Wind-firmness in Pinus pinaster Aït. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm" pdf

... The asymmetry of the crown of standing pines was defined as the distance between the centroid of its horizontal projection and the centre of the stem at the base of the crown. The co-ordinates of the centroid ... from the storm than the 20-year-old ones: the total level of damage was 20% for the former as opposed to 50% for the latter. Despite...

Ngày tải lên : 08/08/2014, 01:21

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$Báo cáo lâm nghiệp: "Changes in phenolic acids and stilbenes induced in embryogenic cell cultures of Norway spruce by two fractions of Sirococcus strobilinus mycelia" pot$

Báo cáo lâm nghiệp: "Changes in phenolic acids and stilbenes induced in embryogenic cell cultures of Norway spruce by two fractions of Sirococcus strobilinus mycelia" pot

... application the total content of stilbene glycosides decreased to 68% of the amount determined in the control. e level of isorhapontin, the stilbene Fig. 1. Changes in the contents of free ... prepara- tions are presented in Fig. 1. In the control Norway spruce cells the soluble glycoside-bound forms of phenolic acids (SG) accounted for most of the to- t...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Human land-use, forest dynamics and tree growth at the treeline in the Western Italian Alps" ppt

... stringent regulations on the separation of grazing of domestic ungulates and forest land in the second half of the 20th century saw a general decrease in grazing and the application of a close-to-nature ... inﬂuences. As far as the growth rate increment is concerned it is im- portant to remember that the second half of the nineteenth century saw the end of the...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: " Managing diameter growth and natural pruning of Parana pine, Araucaria angustifolia (Bert.) O Ktze., to produce high value timber" ppt

... parts of the upper crown or the crowns of neighboring trees reduce their photosynthesis and soon become disconnected from the assimilation distribution system. From this time onward, they only ... a constant max- imum radial increment over the whole rotation period until the target diameter is reached. The assumption of a constant radial increment facilitates the demonstra...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Links between tree structure and functional leaf traits in the tropical forest tree Dicorynia guianensis Amshoff (Caesalpiniaceae)" ppsx

... crown of one individual of the ASD 4 and one sensor at the height of 40 m corresponding to the ASD 5 (emer- gent tree, full sun reference sensor). A scaffold provided access to the top of the crown. ... nodes and longer internodes. This phase stops when the plant experiences the reiteration process [64] which causes the tree crown formation and the first expression...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Sustainable cutting cycle and yields in a lowland mixed dipterocarp forest of Borneo" docx

... logging on the dynamics of the three groups of species was assessed by computing the proportion of each species group for different cutting cycles. The proportions were calculated as the share of the ... natural regeneration in the dipterocarp forests of Sabah, Malay. For. 28 (1965) 4–18. [32] Nicholson D.I., The effects of logging and treatment on...

Ngày tải lên : 08/08/2014, 01:21

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