Báo cáo lâm nghiệp: "Effects of defoliation on the frost hardiness and the concentrations of soluble sugars and cyclitols in the bark tissue of pedunculate oak (Quercus robur L )" potx
Báo cáo lâm nghiệp: "Effects of defoliation on the frost hardiness and the concentrations of soluble sugars and cyclitols in the bark tissue of pedunculate oak (Quercus robur L.)" potx
... 10.1051/forest:2004039Original articleEffects of defoliation on the frost hardiness and the concentrations of soluble sugars and cyclitols in the bark tissue of pedunculate oak (Quercus robur L. )Frank M. ... the bark in the following winter via a reduc-tion in the content of soluble sugars and/ or cyclitols. To obtainpreliminary indications on the role of nitrogen compounds in a defoliation- induced ... determinedas the slope b of the linear relationships between the log values of rela-tive conductivity (RC; %) of the incubation solution and the duration of bark tissue incubation (h) during the...
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Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps
... extremes in the progress of time. Unlike them we dealt with dividing the runoff into components using the analysis of hydrograph by separation its recession limb and determining only the runoff con-stituents ... including drainage treatments, land-use management within the watershed and climate) (Š et al. 2004). The data collected during the investigation provide the following information. e investiga-tion ... 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 led to different...
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Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot
... basic condition 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 ... pollution and increased inputs of nitrogen into plants.METHODS The experiment was established in April 2006 by planting one-year birch plants (Betula pendula Roth) into containers (10-litre ... body and eggs. K (1988) mentions similar results in the increased consumption of food in the creation of a fat body in females of Lochmaea caprae (L. ) Differences of imagoes in the consumption...
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Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf
... another factor indicat-ing man-conditioned acidification of the soil profile. According to the classification of buffer zones, the spruce monoculture occurs predominantly in the aluminium zone, ... for the division of soils according to the values of soil reaction into particular buffer zones, soil under the broadleaved stand falls to the exchangeable zone. It is localized in soils where ... 119–126soil. Consequently, mineral nutrients are accessible only to a limited extent and a risk of uncontrollable washing out the organic colloids increases (U 1983). In the beech stand, pH values...
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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
... few months. These climaticconditions limit the activity of natural fungal inoculum of soilsby reducing the optimal time for fungal spores germination and mycelial growth, thus minimising the ... stimulation of seedlings growth by the fungi could alsobe influenced by nursery practices like the fertilisation levels, the type of substrate, or the container size [9]. When growing in the soil, ... seedlings were thinned to one per container.Inoculation treatments were performed with spores of the five fun-gal species plus non-inoculated control plants. One-month-old seedlings were inoculated...
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Báo cáo lâm nghiệp: " Effects of site preparation with micro-basins on Pinus halepensis Mill. afforestations in a semiarid ombroclimate" potx
... rainfall values in the springseason, there is no correlation between the growth of the rings and the rainfall in any other season or the annual total. Figure 6shows the relationship between these ... underlined the importance of climatic conditions operating on the tree seedlings during the first year of planting on the land. Fernández et al. [13] indicateas well that environmental conditions ... collection for afforestations 19We have studied the correlation existing between the annual and the seasonal rainfall and the annual trunk growth, and the only correlation shown is that of the...
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Báo cáo lâm nghiệp: "Effects of artificial damage on the branching pattern of Nothofagus dombeyi (Nothofagaceae)" ppsx
... time, one of the following treat-ments was applied to the most distal offspring shoot of each labelledparent shoot (Fig. 1): (t.1) clipping of the apex, including all foldedleaves; (t.2) clipping ... (offspring shoots are black filled and parent shoots are grey filled): t.1: clipping of the apex, t.2: clipping of distal buds and leaves,t.3: clipping of distal leaves, t.4: clipping of distal offspring ... distal portion, t.2: clipping of distal buds, t.3: clipping of distal leaves, t.4: clipping of brother shoots, t.5: stem girdling (girdling position indicated with an arrow). Lowerdrawings (offspring...
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Báo cáo lâm nghiệp: "Effects of light intensity on the growth and energy balance of photosystem II electron transport in Quercus alba " potx
... seedlingsgrowing under FL and LS, only a small portion of the leavesactually initiated their growth after the start of the experiment. The significant differences in LAR found between light levelsindicated ... (chlorophyll fluorescence emission) balancesenergy input with utilization at the leaf chloroplast level. The transition from photochemical quenching at low light to non-photochemical quenching ... conductance of the photosyn-thetic apparatus [44]. The large drop in the ratio seen at lowPPFD in FL plants and slightly evident in HS plants, was aresult of a large reduction in the redox state at the...
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Báo cáo lâm nghiệp:" Effects of competing vegetation on juvenile white spruce (Picea glauca (Moench) Voss) growth in Alaska" pdf
... all treatments and replications included,so that the impact of competing cover on sapling size could be eval-uated independent of treatment. Then, equations were developed thatincluded all ... immediately after plant-ing and at the end of each of the first 5 growing seasons. BonanzaCreek seedlings were also measured at the end of the sixth, ninth, and eleventh growing seasons, and Fort ... Effects of competing vegetation on spruce 575birch plug seedlings from the Alaska State Nursery were planted on each plot in the spring of 1992. Birch seedlings were top-killed by frost in the first...
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Báo cáo lâm nghiệp:"Effects of field vegetation control on pine weevil (Hylobius abietis) damage to newly planted Norway spruce seedlings" ppt
... besides the establishment of field vegetation, include the accumulation of litter, and compaction of the soil surface.Örlander and Nilsson [11] concluded that it is unclear howvegetation near the ... colonise the mineral soil.This study concentrates on the relationship between seed-ling damage and the establishment of vegetation cover close to the seedling. The following questions were ... different soil treatments including planting in untreated soil were included. Damage to seedlings by the pine weevil and vegetation around each seedling was monitored 1–2 months aftereach planting....
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