Báo cáo lâm nghiệp: "Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur L )" docx

... 593–600 © INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2005052 Original article Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur ... seedlings and occulted the real effect of flooding via nitrogen availability in the soil. During flooding, amino acid contents in tapr...

Ngày tải lên: 08/08/2014, 00:22

... The formation of pollen, the pollination mechanism, and the determination of the most favourable time for controlled pollination in Pseiidotstiga menziesü. Silvae Genet., ... celle d’un pollen considéré au moment de sa déhiscence en conditions naturelles, et l on constate parallèlement une évolution des vacuoles et du chondriome. Mais il est...

Ngày tải lên: 09/08/2014, 06:21

... of inoculated trees and seedlings (Przybyl and Delatour, personal communication). The presence of living coni- dia in the xylem tissue and vessels could induce potential ... irre- versible decline in total leaf specific conductance of all saplings; direct measurement of losses of hydraulic conductivity in twigs and petioles revealed tha...

Ngày tải lên: 08/08/2014, 19:21

... regional index residual tree-ring chronology was created in the ARSTAN application. e chronol- ogy has low values of autocorrelation. e standard regional tree-ring chronology was also established. ... evaporation in- tensively and the following decrease in soil moisture in the top ground layer then reduces the creation of nutrients and also water availability during the...

Ngày tải lên: 07/08/2014, 03:22

... internodial sections t 8 and below. Methodology for stem volume calculation was based on the length of internodial section and its middle cross-sectional circle area measurement. SWD of tree ... 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, Nati...

Ngày tải lên: 07/08/2014, 03:22

... stands even in the 7 th and 8 th altitudinal (vegetation) zones, especially when fertilized. Keywords: Jizerské hory Mts.; chemical amelioration; biological amelioration; initial fertilizing; ... through mineralization and the necessity of sufficient tree litter input to soil (U, J 2007). On stony and skeletal soils and soils cover- ing boulder substrata, a rapid re...

Ngày tải lên: 07/08/2014, 04:20

... hand, in the basalt and control treatments, the foliar Ca concentrations have significantly increased since planting. e concentration of Mg in the leaves of limed trees was surprisingly low ... quantity of exchangeable P while the application of basalt increased it substantially. e liming reduced the content of exchangeable K in the 0–10 cm layer, while the application...

Ngày tải lên: 07/08/2014, 10:22

... these species should be mainly attributable to differences in foliar- level physiological traits [13], and possibly in allocation pat- terns, but not to morphological ones. 4. CONCLUSIONS Results of the ... is often the result of small but effective differences in both physiological, morphological and allocation traits, both at the foliar and the whole-plant level [22]. Furt...

Ngày tải lên: 08/08/2014, 00:21

... to flush in late April or early May, while autumn leaf coloring starts in late October. 2.2. Micrometeorology and soil moisture content Meteorological conditions were monitored from scaffolding ... RESULTS AND DISCUSSION 3.1. Forest microclimate and variations in soil moisture content Daily rainfall (P day ) in late summer was extremely low with no measured rainfall between Ju...

Ngày tải lên: 08/08/2014, 00:21

... patterns. The longitudinal modulus of elas- ticity E X values were thus 14 000 MPa, the shear modulus G XY values in the LT plane were 900 MPa and the Poisson’s ratio ν XZ values in the LR plane were ... vibration / wood Résumé – Influence des dimensions de la section transverse sur le facteur de cisaillement de Timoshenko. Applications aux poutres en bois en vibration de flexion li...

Ngày tải lên: 08/08/2014, 00:22