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Báo cáo lâm nghiệp: "Succession of or stand age" pptx

Báo cáo lâm nghiệp: "Succession of or stand age" pptx

Báo cáo lâm nghiệp: "Succession of or stand age" pptx

... Succession of mycorrhizae: a matter of tree age or stand age? D. Blasius F. Oberwinkler Institut für Botanik, Spezielle BotaniklMykologie, Universität TObing 6 ,n Auf der Morgenstelle ... a considerable amount of pub- lished evidence to support the view that a succession of mycorrhizae occurs during the development of first-rotation forest plant...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: " Humus conditions and stand characteristics of artificially established young stands in the process of the transformation of spruce monocultures" pdf

Báo cáo lâm nghiệp: " Humus conditions and stand characteristics of artificially established young stands in the process of the transformation of spruce monocultures" pdf

... Distribution of pH H 2 O in layers of forest floor and organomineral horizon in different experimental stands Fig. 3. Distribution of pH KCl in layers of forest floor and organomineral horizon in ... content of DOC was noted in forest floor and then in Ah horizon. It has been proved that forest floor horizons (L, F, H) contain the highest pro- portion of organic substances and...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Results of a phenological study of the tree layer of a mixed stand in the region of the Drahanská vrchovina Upland" ppt

Báo cáo lâm nghiệp: "Results of a phenological study of the tree layer of a mixed stand in the region of the Drahanská vrchovina Upland" ppt

... 2007). Supported by the Ministry of Education, Youth and Sports of the Czech Republic, Project No. MSM 6215648902. Results of a phenological study of the tree layer of a mixed stand in the region of ... environmental signal for the tree to use for the optimal timing of the onset of growth. For deter- mining the onset of developmental stages, the concept of temperature s...

Ngày tải lên : 07/08/2014, 03:22

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

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

... (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 41 years (2007). Comparison for three ... stands is an important silvicultural measure directed at development of forest stands in terms of their production and non-production func- tions. Segmentation of stands by tracks...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps

Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps

... authors also reported that growing roots play an important role in the process of for- mation of preferential flowpaths for water (S 1980; K et al. 2003; N 2005). e former ... initial size of the calibration period. Keywords: drainage treatment; forested watershed; recession limb; runoff components; stormflow hydrograph Supported by the Ministry of Agriculture of...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Stability of the development of basic stand parameters of beech yield tables constructed on the basis of short-term observations on research plots" pptx

Báo cáo lâm nghiệp: "Stability of the development of basic stand parameters of beech yield tables constructed on the basis of short-term observations on research plots" pptx

... 2 arithmetic mean, 3 standard deviation, 4 average change of yield class, 5 arithmetic mean of errors, 6 standard deviation of errors, 7 root mean square error, 8 value of the t–test, *Values ... numerical evaluation of relative errors of yield tables according to formulas (2)–(5) is given in Table 1. Development of mean height Development of mean heights of beec...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: " Influence of stand density, thinning and elevated CO2 on stem wood density of spruce" pot

Báo cáo lâm nghiệp: " Influence of stand density, thinning and elevated CO2 on stem wood density of spruce" pot

... Specifically, SWD of forest trees is influenced by many factors. ere are physi- cal factors influencing SWD – weight of the crown, ice or snow loading. From the abiotic factors – soil moisture ... Intention of ISBE AS CR, Project No. AV0Z60870520. Influence of stand density, thinning and elevated CO 2 on stem wood density of spruce I. T 1 , R. P 1 , M. V. M 1...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Analysis of snow accumulation and snow melting in a young mountain spruce and beech stand in the Orlické hory Mts., Czech Republic" pptx

Báo cáo lâm nghiệp: "Analysis of snow accumulation and snow melting in a young mountain spruce and beech stand in the Orlické hory Mts., Czech Republic" pptx

... Supported by the Ministry of Education, Youth and Sports of the Czech Republic, the Research Plan of the Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry ... ﬂows out of the forest. In scientific literature attention is paid to the problem of the water regime of forest stands in win- ter seasons including snow measurements already for...

Ngày tải lên : 07/08/2014, 04:20

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Báo cáo lâm nghiệp: "Transformation of solar radiation in Norway spruce stands into produced biomass – the effect of stand density" doc

Báo cáo lâm nghiệp: "Transformation of solar radiation in Norway spruce stands into produced biomass – the effect of stand density" doc

... proportional to absorbed PAR. e spatial structure of forest stand canopy plays a key role in the absorbing process of incident radiation. Because of the role of active leaf area in PAR absorption ... on the basis of stand inventory realized at the end of each growing season. e procedure of the stand inventory consisted of measurements of stem circumference at t...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf

Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf

... of forest floor 0 10 20 30 40 50 60 70 80 Spruce forest stand Beech forest stand Mixed forest stand (t/ha) layer L layer F layer H suma Mixed Beech Spruce forest forest forest stand stand stand 122 ... of pH KCl in layers of forest floor and organomineral horizon in different forest stands Fig. 3. Distribution of pH H 2 O in layers of forest floor and organomineral ho...

Ngày tải lên : 07/08/2014, 10:21

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