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Báo cáo lâm nghiệp: "Sulphur and nitrogen concentrations and fluxes in bulk precipitation and throughfall in the mountain and highland spruce stands in the Czech Republic" docx

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Sulphur and nitrogen concentrations and fluxes in bulk precipitation and throughfall in the mountain and highland spruce stands in the Czech Republic" docx

... radiation and to hold the funnels approximately 1 m above the ground.  ere were 7 collectors randomly dis-tributed at the mountain spruce stand and 5 at the highland spruce stand. During the winter ... concentrations and fl uxes in bulk precipitation and throughfall in the mountain and highland spruce stands in the Czech RepublicI. D, L. M, J. K, I. MInstitute of Forest Ecology, ... given in Table 1. Bulk precipitation and throughfall sampling were carried out at both sites during 2006–2008. For sampling throughfall in the spruce stand and atmospheric precipitation on the...
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Báo cáo lâm nghiệp: "Effect of nitrogen supply on growth and internal cycling within deciduous trees nitrogen" docx

... the plants fertilised with 8.0 mol N-M-3. In addition to the spring remobilisationof stored N, internal cycling also involves the storage of N in woody tissues in the autumn. ... in the first experi-ment increased the growth of the new tis-sues (leaves, roots and stem extension) and their N content, due to increaseduptake of N (Table I). The ... dependedupon internal cycling of N. In these N-defi-cient plants, leaf growth ceased after 26June and thereafter N was transferredfrom the leaves to the roots, which contin-ued...
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Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot

... of the rapid increase in the nitro-gen content in birch leaves was demonstrated by the analysis of its level in the dry matter of leaves during the spring season. e amount of nitrogen increased ... nitrogen depositions in the Krušné hory Mts. according to data of the Czech Hydrometeorological Institute in Prague (ČHMÚ).Growth properties were evaluated according to the plant height and ... 17–23 the proportion in feeding according to sex could not be evaluated.CONCLUSIONe input of nitrogen into a plant through soil became evident by the increased content of nitrogen in birch...
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Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. I. Trees and forest floor daily transpiration" ppsx

... in the thinned plot and 28 m2 ha–1 in the control one (Tab. I). Quercus rubra and Fraxinus are part of the dom-inant canopy respectively in the thinned and the control plot; Acer isan intermediate ... a decreasing ranking of SA and crown area(Tab. II). In 2000, the tendency observed in the thinned plot isnot confirmed (and cv% are high), whereas in the control plot, the same ranking is observed ... comparedwith other forest stands reviewed from lite-rature in different species and site condi-tions [19], including Quercus stands. ŠC508 C. Vincke et al.values, especially in the thinned plot....
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Báo cáo lâm nghiệp: "Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst" docx

... PNV mapping achieved in the model territory is at a similar level as in the remaining area of the Czech Republic.ere are historical records of the tree composi-tion in the area. In 1645, ... was described in both 1711 and 1808; N (1957) and N and T (1974) reported a low proportion of aspen and fir in the following years. In spite of the fact that during the subsequent ... existence and the main concern in its further development. The demarcation of additional PNV units by dividing the existing ones would be rather coun-ter-productive with respect to the focus of the...
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Báo cáo lâm nghiệp: "Forest vegetation management (FVM) is key to successful forest stand establishment around the world" doc

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Báo cáo lâm nghiệp: "Moisture effect on carbon and nitrogen mineralization in topsoil of Changbai Mountain, Northeast China" pptx

... types on the northern slope of the Natural Reserve Zone of Changbai Mountain. The elevation influence on soil C and N mineralization was also discussed. The results indicated that for the given ... Changbai Mountain the C and Nmineralization rate, potential mineralizable C (C0) and potential rate of initial C mineralization (C0k) all increased as the soil moisture rose. The elevation ... significant. The complex mechanism of their impact on the soil C and Nmineralization of Changbai Mountain remains to be studied further based on data of field measurements in the future.Keywords:...
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Báo cáo lâm nghiệp: "Effects of resource availability on condensed tannins and nitrogen in two Quercus species differing in leaf life span" doc

... regimes (500 and 800 mm) and with two nutrient availabilities(standard substrate and 7% increase in soil N). The concentrations of soluble condensed tannins (CT) and nitrogen in the leaves were ... 283−335.[25] Heuze P., Schnitzler A., Klein F., Consequences of increaseddeer browsing winter on silver fir and spruce regeneration in the Southern Vosges mountains: Implications for forest management,Ann. ... CT in the evergreen species, other au-thors did not find any difference in another pair of co-occurring evergreen and deciduous oaks, such as Q. ilex and Q. pubescens [45]. The difference in N concentrations...
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Báo cáo lâm nghiệp: "Forest and shrubland canopy carbon uptake in relation to foliage nitrogen concentration and leaf area index: a modelling analysis" ppt

... the actualconditions (solid lines) and with anincrease in leaf area index, L, of 50%(dashed lines). The panels in the centreshow the actual conditions for the canopies and the panels on the ... the actual conditions(solid lines) and with an increase in leafarea index, L, of 50% (dashed lines). The panels in the centre show the actualconditions for the canopies and the panelson the ... electrontransport in all layers. When L was increased by 50% in the model, this increased the shaded leaf fraction in all layers in both canopies. Increasing Na by 50% increased A in the toplayers of the...
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Báo cáo lâm nghiệp: "Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur L.)" docx

... availability in the soil.During flooding, amino acid contents in taproot of stressedseedlings remained high and similar to that of controls. Thisresult indicated that flooded roots maintained amino ... in flooded seedlings. In fact, Dickson [10] underlined the involve-ment of cytokinin in bud break initiation of Quercus rubraseedlings. Initiation of new roots in stressed seedlings began26 ... by root for amino acid synthesis. In the flooding treatment, the decrease of nitrate concentra-tions was more important in the rhizosphere than in the bulk soil (Figs. 3 and 4). These results...
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