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Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot

Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Forest visitors’ opinions on the importance of forest operations, forest functions and sources of their financing" docx

... impaired by their demands as they increase the costs of timber production and lower the revenues. By persisting on these suggestions the respondents would paradoxi-cally destroy the market ... payments by us-ers of forest functions; only 5.7% suggest at least the partial coverage of these costs from payments by users of forest functions. As many as 11.0% of respondents think that the ... inadvertently) and they may also be influenced by the information environment in CR. e opinion on forest operation importance is though incompatible with the visitors’ opinion on the coverage of increased...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot

... Weevils of the genus Phyllobius – consumption of food on birch affected by differentiated inputs of nitrogen Fig. 7. e weight of the dry matter of birch leaves affected by the application of ammonium ... Mean consumption of food by females of Phyllobius arborator after 6 days of feeding in a laboratory rearing (0.95 reliability intervals)Fig. 10. Mean consumption of food by males of Phyllobius ... nega-tive response induced by the nitrogen surplus when the content of nitrogen ions in the substrate probably acted as a stress factor causing the disturbance of the uptake of other nutrients...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Salicylic acid up-regulates the expression of chloroplastic Cu, Zn-superoxide dismutase in needles of maritime pine (Pinus pinaster Ait.)" pptx

... expression 849 The amino acid sequence of the corresponding protein was ana-lysed together with other chloroplastic- and cytosolic-SODs(Fig. 2), using the Jones-Taylor-Thorton model of maximumlikelihood ... during the oxidative burst thatoccurs in incompatible plant-pathogen interactions could be the signal responsible for the induction of SAR [6]. Several studiesreported the effects of SA on the ... dunes asa way of preventing sand invasion on agricultural and urbanfields. By the beginning of the last century, it represented over60% of the Portuguese forest. While it is still the main forestspecies...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Ecophysiological factors contributing to the distributions of several Quercus species in the intermountain west" docx

... hybridizationat the southern portions of the distribution of Q gambelii, the occurrence of long-livedhybrids between Q gambelii and Q turbinella300 km north of the northernmost ... of 7 to 10 m. Its distributionis bounded on the east by the eastern decid-uous forest and on the west by the semi-arid grasslands of the Great Plains.MATERIALS AND ... of this paper is to examineaspects of the water relations of these threeoak species native to the intermountain westand of their hybrids under common growthenvironments...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effects of a clear-cut on the in situ nitrogen mineralisation and the nitrogen cycle in a 67-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) plantation" potx

... before the growth of new understorey vegetation [24]. On the otherhand, after the growth of the understorey, N leaching is reduced by the uptake of the new vegetation. In the present study, N contentin ... depends on the influence of the weather on the decomposition rate. Furtherinvestigations would have been necessary in this study in orderto determine the persistence of the decrease of nitrogen ... content of the soil outside the cylinders at the start of the incu-bation period, which also corresponded to the content at the end of the previous incubation period. The leaching of N (from...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: "Effects of sulfuric acid and nitrogen deposition on mineral nutrition of Picea abies (L.) Karst" ppt

... vitality of Pinussylvestris (L.)Vitality, nutrient supply of P. sylvestris, chemicalconstitution of the soil solution and NH4concentrations of the air were determined on the ... acid of pH’s corresponding to the average protonbuffering of the canopy of various sprucestands of the Fichtelgebirge. The equiva-lent fraction of Mg (% Mg of E K, ... preparation) sup-port this hypothesis. In addition, NH4/NH3deposition may have toxic effects on the plant tissue (Ewert, 1978).ConclusionAcid deposition based on high...
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Báo cáo lâm nghiệp:

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

... recession limb and determining only the runoff con-stituents and their comparison also in the process of time. Similarly, the influence of land use changes on the ratio of runoff components (surface ... forest stand. Under such conditions, the fluctuation of runoff can be related to the loss and restoration of both interception and transpiration. On the other hand, the drainage-induced change ... relation to runoff, assessed total runoff and its extremes in the progress of time. Unlike them we dealt with dividing the runoff into components using the analysis of hydrograph by separation...
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Báo cáo lâm nghiệp:

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

... lower than the given range, which can be another factor indicat-ing man-conditioned acidification of the soil profile. According to the classification of buffer zones, the spruce monoculture occurs ... amount of washed out nitrogen is higher than 10% of the total nitrogen in the ecosystem. Val-ues from forest floor in the coniferous stand do not fall below the limit. e accumulation of nitrogen ... by the close relationship of the C/N ratio and soil transformations of nitrogen (C et al. 2000). In forest soils of Europe, the C/N ratio ranges between 10 and 100 in the organic horizon,...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: " Effects of ectomycorrhizal inoculation and the type of substrate on mycorrhization, growth and nutrition of containerised Pinus pinea L. seedlings produced in a commercial nursery" docx

... required by the fungus [11, 35]. The lack of stimulation of seedlings growth by the fungi could alsobe influenced by nursery practices like the fertilisation levels, the type of substrate, or the container ... physiologicalstatus by enhancing the photosynthetic capacity [11] and by increasing the uptake of water and nutrients, and their accumu-lation in the seedling tissues [3, 8]. Environmental conditions marked by ... the formation of mycorrhizas. The relatively high pH value (7.7) of the substratecould have reduced the efficacy of all fungi tested. Since most of them are acidophilous, both the germination...
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Báo cáo lâm nghiệp:

Báo cáo lâm nghiệp: " Effects of site preparation with micro-basins on Pinus halepensis Mill. afforestations in a semiarid ombroclimate" potx

... 19,29]. This is the reason why the introduction of seedlings linkedto the site preparation focused on concentrating runoff water on the seedling bed can not only improve the afforestation andavoid ... that of the rainfall values in the springseason, there is no correlation between the growth of the ringsand the rainfall in any other season or the annual total. Figure 6shows the relationship ... VegetationIf we observe the figures showing the distribution of the dif-ferent plots along one of the analysis axis (Fig. 7) and the dis-tribution of the homogeneous groups within the results...
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