Báo cáo lâm nghiệp: "Influence of fire and tree-fell on phys

Báo cáo lâm nghiệp: "Influence of fire and tree-fell on physiological parameters in Quercus ilex resprouts" potx

... mineral content and leaf area (LA) determinations. Environmental conditions (inci- dent radiation [PAR], air and leaf temperature, vapor pressure deficit) during sampling and mesurements ... differences in nutrient (N,C,P,K and Ca) and soluble carbohydrate concentrations in leaves of resprouts originated after fire or after tree-fell indica...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: " Influence of temperatures and precipitation on radial increment of Orlické hory Mts. spruce stands at altitudes over 800 m a.s.l" ppt

... previous year and by precipitation in that particular year. Precipitation in spring of the previous year and precipitation in winter, spring and summer of that particular year are of the highest ... recording the interval of table top shift- ing and in this way also the tree ring width. Measuring and synchronizing of tree-ring sequences were carried out using...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Influence of light and competition on crown and shoot morphological parameters of Norway spruce and silver fir saplings" doc

... at 1-min inter- vals, from 7.00 to 17.00, on 10 different days selected at the beginning, middle and end of the growing season on both clear and overcast sky conditions in order to increase their ... competition on growth and morphological parameters was not statistically detectable, although an effect in non-limiting light conditions is possible. On the basis of the p...

Ngày tải lên : 08/08/2014, 00:21

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Báo cáo lâm nghiệp: "Influence of exogenous L-proline on embryogenic cultures of larch (Larix leptoeuropaea Dengler), sitka spruce (Picea sitchensis (Bong.) Carr.) and oak (Quercus robur L.) subjected to cold and salt stress" pdf

... filtration on 200 µm nylon mesh and resuspension. 200 mg samples of cells were analysed in triplicate. The free proline concentration in the cells was determined using a modified ninhydrin method ... and oak (results not shown). 3.2. Influence of proline in relation to concentrations of NaCl Figure 2 shows the growth rate of larch embryogenic cultures grown in varying...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "Influence of cross section dimensions on Timoshenko’s shear factor – Application to wooden beams in free-free flexural vibration" ppsx

... Equation (1) takes the effects of shear deflection and rotary iner- tia into account. Coefficient K, which is a dimensionless quantity that is dependent on the shape of the cross section, is introduced ... have investigated the validity range of Timoshenko’s beam equation when the height/width ratio of the cross section varies between that of a thin vibrating beam to that of a...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: " Release of oxalate and protons by ectomycorrhizal fungi in response to P-deficiency and calcium carbonate in nutrient solution" pptx

... in the weathering of P-containing minerals, thus promoting desorption of solid phase P into the soil solution. However, in natural conditions such as in calcareous soils, where nitrate is considered ... setchelli and Gautiera monticola [9] was observed simultaneously with an intense weathering of soil minerals and increased concentrations of inorganic ions in soil solutio...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: " Effect of the root temperature on growth parameters of various European tree species" ppsx

... stomatal conductance, transpiration and dark respiration were mea- sured on fully expanded leaves of six seedlings growing under normal greenhouse conditions in May. The ... normalization. Transpiration was hardly influenced. Res- piration showed, at the beginning of the experiment, a strong depression and later on a strong stimulation. The s...

Ngày tải lên : 08/08/2014, 18:21

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Báo cáo lâm nghiệp: " Influence of stand density, thinning and elevated CO2 on stem wood density of spruce" pot

... and non-stressed conditions. In: JACOBY G.C., HORNBECK J.W. (eds.), Proceedings of the Inter- national Symposium on Ecological Aspects of Tree-Ring Analysis. Springfield, National Technical Information ... ese inconsistent results obtained for individual coniferous species can be also caused by diﬀerences in cultivation design and also in fumiga- tion duration. Presented v...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Influence of pulverized limestone and amphibolite mixture on the growth performance of Alnus incana (L.) Moench plantation on an acidified mountain site" potx

... during the conversion of blue spruce stands even under environmentally highly stressing conditions, (2) to assess the foliar nutrient status of the alder as a precondition of positive in uence ... decrease in height during the winter period through Table 6. Proportion values of nutrition elements to N (=100%) in dry mass of leaves (the 1 st section of the table) and...

Ngày tải lên : 07/08/2014, 04:20

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Báo cáo lâm nghiệp: " Influence of a planting hole application of dolomitic limestone powder and basalt grit on the growth of Carpathian birch (Betula carpatica W. et K.) and soil chemistry in the air-polluted Jizerské hory Mts." pptx

... plantation response as liming. e increasing concentrations of foliar S and N might indicate a persisting air-pollution load on the site, which is in agreement with the outcomes of a long-term monitoring ... the K cations, in contrast to liming, surely participated in it. e increased CEC as a result of liming and also basalt grit application is in line with the expec...

Ngày tải lên : 07/08/2014, 10:22

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