Báo cáo lâm nghiệp: "Historical development of floodplain fo

Báo cáo lâm nghiệp: "Historical development of floodplain forests in the Upper Moravian Vale (Vrapač National Nature Reserve, Czech Republic)" pot

... data ob- tained in the areas of the Morava River ﬂoodplain in the area of Vrapač suggest that the development of the present ecosystems in the area in question began in the period of large-scale ... anthropogenic in uences that have over centu- ries led to the present state of the geobiocoenoses. Historical development of ﬂoodplain forests in...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Habitat distribution of dipterocarp species in the Leyte Cordillera: an indicator for species – site suitability in local reforestation programs" ppt

... on the western side of the mountain range are actually typical species of the coastal plains which found their refuge in the rugged western foothills of Mt. Pangasugan. The dominant role of Shorea polysperma ... consists of 36 plots of 100 m 2 each located in the primary forest of the western foothills of Mt. Pangasugan, within the forest reserve of the...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Different technologies of floodplain forest regeneration from the aspect of soil changes" pot

... processes of their decomposition are inter- rupted in the clearings. In the course of clear-felling regeneration, the pH values of the upper soil horizon are slightly increased. In the preparation ... the subject of this paper, particularly comparing the eﬀect of the natural regeneration of ﬂoodplain forests with clear-felling regeneration. Methods...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Element analysis of tree rings in pedunculate oak heartwood: an indicator of historical trends in the soil chemistry, related to atmospheric deposition" ppsx

... test the interest of tree-ring analysis. METHODS We selected the Amance State Forest, about 1 000 ha, in the Lorraine plain, 15 km northeast of Nancy, in the northeast of ... and/or of ring translocations inside the tree would proba- bly conceal the effects on the ring mineral content of possible temporal decrease of their concentr...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: "Seasonal development of female strobilus of stone pine (Pinus pinea L.)" ppsx

... cell appears in the center of each ovule. Division of this cell initiates the spongy tissue. During the whole next year of development, few changes in the ovule occur; the spongy ... year of development does the free-nuclear stage of the female gametophyte appear in the center of the greatly enlarged spongy tissue. From now o...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "Genetic variation of Prunus avium in susceptibility to cherry leaf spot (Blumeriella jaapii) in spatially heterogeneous infected seed orchards" docx

... ith clone in the kth block in the lth year, µ is the overall mean, K ikl is the kriging estimate at the position of that tree in year l, B k and Y l are the eﬀects of the kth block, and the lth ... analysis of variance using the SAS MIXED procedure [28]. Clone by site interaction was analyzed combining the leaf spot data of year 2005 in Sergude with the A...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: " Viscoelastic behaviour of green wood across the grain. Part I. Thermally activated creep tests up to 120 °C" ppsx

... that the stress level is independent of the mechanical proper- ties of the material. It depends only on the load and on the sample geometry. In the following, the value of σ max determined using ... reduced the cooling rate during the cooling period. Concerning the sample deflection, three stages appear clearly on the second graph: – a period at increasing cree...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Viscoelastic behaviour of green wood across the grain. Part II. A temperature dependent constitutive model defined by inverse method" pot

... simultaneously to fit the parameters of the constitutive model. In this possibility lies the main innovation of the inverse method pro- posed here. This feature is the key element of the identification ... i using the esti- mated set of parameters; N j is the number of discrete time for test j; M is the number of tests used to identify the parameters of t...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Interannual variation of soil respiration in a beech forest ecosystem over a six-year study" pps

... growth in young Pinus radiata [28]. Therefore, thinning-induced root prolifer- ation would compensate for the initial decrease in root biomass, maintaining the contribution of root respiration during ... sparse. The plot was thinned during winter 1994/1995 and during winter 1998/1999 as shown by huge changes in leaf area index (Tab. I). Trees were about 30 year-old at the begi...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: " Decomposition dynamic of fine roots in a mixed forest of Cunninghamia lanceolata and Tsoongiodendron odorum in mid-subtropics" docx

... amounts of nitrogen (N) increased a little initially in the fine roots of the Chinese fir during a short duration. In contrast, the fine roots of Tsoong’s tree were releasing N from the outset. The ... concentration, lignin content, ratio of lignin/N and ratio of lignin/P of the initial material were the best predictors of mass loss for roots of the Chine...

Ngày tải lên : 08/08/2014, 01:22

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