Báo cáo lâm nghiệp: "New insights in the recognition of the

Báo cáo lâm nghiệp: "New insights in the recognition of the European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl as useful tools for forest management" pdf

... 733 c  INRA, EDP Sciences, 2006 DOI: 10.1051 /forest: 2006054 Original article New insights in the recognition of the European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl as useful ... morphological or genetic, can be insuﬃcient for eﬃcient separation of groups, as it is the case for the common ash (Fraxinus excelsior...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands" potx

... functional connection of roots with the soil as well as with the other tissues of the plant is related to soil water-holding capacity and to the potential of ion exchange reactions. In case that the ... plots Study plots were selected on the basis of compa- rable conditions of the spruce forest altitudinal zone and ecological series with generally identic...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Compression stress in opposite wood of angiosperms: observations in chestnut, mani and poplar" ppsx

... poplar are also shown, including measurements of RGS and micro-ﬁbril angle. 2.1. Residual growth strain (RGS) Various methods are available for measuring RGS. They are based on the same principle, ... principle, which consists in measuring the longitudinal strain at the wood surface, after artiﬁcially releasing the stress [15,30]. For chestnuts and mani, the “single ho...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Age trends in genotypic variation of wood density and its intra-ring components in young poplar hybrid crosses" doc

... Québec. All sites were originally abandoned agricultural land. Each clonal trial was established in a randomized complete block design, with ten blocks each. Clones were planted in row plots, ... homogeneity of clonal variances and the level of true genetic variances within each hybrid cross. Therefore, instead of analysing within each hybrid the analysis was carried out on...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Nutrient dynamics in decomposing needles of Pinus luchuensis after typhoon disturbance in a subtropical environment" pps

... leaching. The rapid release of K and Mg in the early phase observed in the present study could be attributed to the physical removal by leaching. The release of the other elements might be controlled ... was measured for two needle types, i.e. typhoon-generated and normally fallen needles. The two types of needles were collected with litter traps at the same pl...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia)" docx

... seedlings were planted in the soil from the decomposing stand and compared with both yellowing and green seedlings planted in the soil from the beech stand (Table 8). Phenomena of decline in two spruce ... we selected several seedlings from the air-pollution plot in the Hliníky locality in two modiﬁcations − with symptoms of needle yellowing and apparently g...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Timber harvesting in the ukrainian carpathians: Ecological problems and methods to solve them" ppsx

... from the forestry point of view, mineralized plots play a positive role because they as- sist in the natural renewal of forests, especially in the case of unclear cutting. e average volume of ... basic passages established without using engineering structures and drainage and have rather large longitudinal inclines, which in most cases does not allow using the...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Available nitrogen in the surface mineral layer of Serbian forest soils" docx

... are in the range of 10.31–12.79, which is usual for forest soils. Except the soil under the black locust forest, the ammonium form of nitrogen is the dominant form of easily available mineralN. ... from the following formula: IM = total initialmin – N NN (2) where: N min ‒ quantity of mineralized N without subtraction of the initial content of avai...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "A change in structural diversity and regeneration processes of the spruce virgin forest in Nefcerka NNR (TANAP) in relation to altitude" docx

... relation with the altitude and developmental stage of the virgin forest is shown in Table 1 and in Fig. 1. Based on an analysis of the plots of the spruce virgin forest representing the growth ... the individuals from natural regeneration (individuals of the height below 130 cm) is declining in all stages of the virgin forest with the increas...

Ngày tải lên : 07/08/2014, 10:22

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Báo cáo lâm nghiệp: "Climatic signal in annual growth variation of silver ﬁr (Abies alba Mill.) and spruce (Picea abies Karst.) from the French Permanent Plot Network (RENECOFOR)" ppsx

... storage and growth of the following year. Warm- ing in winter could also decrease embolism [33], advance leaf unfolding and lengthen the growing season the following year [31]. Diﬀerent process-based ... mountains, Ann. For. Sci. 62 (2005) 761−770. [42] Rolland C., Tree-ring and climate relationships for Abies alba in the internal Alps, Tree-ring Bull. 53 (1993) 1−11...

Ngày tải lên : 07/08/2014, 16:21

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Báo cáo lâm nghiệp: "New insights in the recognition of the European ash species Fraxinus excelsior L and Fraxinus angustifolia Vahl as useful tools for forest management" pdf

Báo cáo lâm nghiệp: "New insights in the recognition of the European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl as useful tools for forest management" pdf

Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands" potx