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 nutri- ent (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

... pre- vious 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

... 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

... 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 cul- tures grown in varying...

Ngày tải lên: 08/08/2014, 01:22

... 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

... 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

... stomatal conductance, tran- spiration 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

... 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

... 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

... 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