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 Republic I. D...

Ngày tải lên: 07/08/2014, 10:21

... the plants fertilised with 8.0 mol N- M-3. In addition to the spring remobilisation of 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 increased uptake of...

Ngày tải lên: 09/08/2014, 04:20

... 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 accor...

Ngày tải lên: 07/08/2014, 10:21

... in the thinned plot and 28 m 2 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 is an intermediate ... a decreasing ranking of SA and crown area (Tab. II). In 2000, the tendency observed in the thinned plot is not confirmed (and cv% are high), whereas in...

Ngày tải lên: 08/08/2014, 00:22

... 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 t...

Ngày tải lên: 07/08/2014, 10:22

Ngày tải lên: 08/08/2014, 01:22

... 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 (C 0 ) and potential rate of initial C mineralization (C 0 k) all increased as the soil moistu...

Ngày tải lên: 07/08/2014, 10:21

... 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 increased deer browsing winter on silver fir and spruce regeneration in the Southern Vosges mountains: I...

Ngày tải lên: 07/08/2014, 16:21

... the actual conditions (solid lines) and with an increase in leaf area index, L, of 50% (dashed lines). The panels in the centre show the actual conditions for the canopies and the panels on the ... the actual conditions (solid lines) and with an increase in leaf area index, L, of 50% (dashed lines). The panels in the centre show the actual conditions for t...

Ngày tải lên: 08/08/2014, 00:22

... availability in the soil. During flooding, amino acid contents in taproot of stressed seedlings remained high and similar to that of controls. This result 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 rubra seedlings. Initiation of new roots in stresse...

Ngày tải lên: 08/08/2014, 00:22