Báo cáo lâm nghiệp: "an Phytophthora quercina have a negative impact on mature pedunculate oaks under field conditions" pptx

... and analysis of the effects of air pol- lution on forests, 4th ed., United Nations Economic Commission Impact of P. quercina on mature oaks 671 for Europe Convention on Long-range Transboundary Air Pollution: ... well as in non-infested stands and leaf concentrations of P were low in all trees. (iv) Soil around healthy oaks did not have higher pH and base saturation than soil...

Ngày tải lên: 07/08/2014, 16:20

... was modulated by P nutrition via leaf area expansion rather than via a change in RUE. The linear relationship between total biomass and absorbed irradiance had a steeper slope under low than under ... 4 shows the total leaf area per seedling calculated at the three sampling dates versus thermal time after transplanta- tion. P availability affected leaf area development only under hi...

Ngày tải lên: 08/08/2014, 00:22

... 10.1051/forest:2003029 Original article Optimisation of inoculation of Leucaena leucocephala and Acacia mangium with rhizobium under greenhouse conditions Diégane DIOUF a , Sylvain FORESTIER b , Marc NEYRA c and Didier ... beneficial effect of inoculation was all the more important that the inoculum was provided one week after transplantation, that is to say after the apparition of seco...

Ngày tải lên: 08/08/2014, 01:21

... soil-to-leaf conductance during a pro- longed drought in Q petraea caused a reduction in maximal transpiration rates. The transpiration rates reduced just enough to maintain the ... Ψ leaf above the cavitation threshold. Computer simulations demonstrated that lack of stomatal regula- tion would have caused high loss of con- ductance in twi...

Ngày tải lên: 08/08/2014, 18:21

... valuable assortments. In addition, ecological considerations weigh in favour of earlier conversion because coniferous stands may exert a negative impact on forest sites causing their degra- dation. ... single-species pine stands was 92,800 ha and that of mixed stands in which pine was a dominant species – 37,700 ha (Table 1). e above data was obtained from the Regional Directo...

Ngày tải lên: 07/08/2014, 03:22

... 473 difference was significant due to a variation in the crown diameter values. e nutritional status (Table 5) was assessed on the basis of foliar macroelement concentration. Ac- cording to provisional ... LŐHMUS K., 2002. Biomass production and nutrient accumulation in short-rotation grey alder (Alnus incana (L.) Moench) plantation on abandoned land. Forest Ecology and Management,...

Ngày tải lên: 07/08/2014, 04:20

... Australia 2 Faculty of Education and ACSC, USQ, Toowoomba, Australia 3 Faculty of Business and ACSC, USQ, Toowoomba, Australia ABSTRACT: e collection and sale of asparagus (Asparagus racemosus Willd.) ... managing the Department’s and the National Park’s forests, and giving legal permissions to collect asparagus from the National Park, which would have happened anyway at the financial an...

Ngày tải lên: 07/08/2014, 10:21

... Nagakura J., Shigenaga H., Akama A. , Takahashi M., Growth and transpiration of Japanese cedar (Cryptomeria japonica) and Hinoki cypress (Chamaecyparis obtusa) seedlings in response to soil water content, ... 70 ◦ C. 2.1.6. Data Analysis Gas exchange data were normalized by log transformation. Treat- ment effects on growth, gas exchange, and leaf optical properties were evaluated by analysi...

Ngày tải lên: 07/08/2014, 16:20

... transferred to 1 / 2 LPC. Data were taken after 60 days of culture. Percentages have been transformed us- ing arcsin transformation for statistical analysis. Two way analysis of variance (ANOVA) ... Mediterranean area, with an important role in soil conservation, landscape architecture, and is highly regarded for its edible seeds. This makes many aspects of its manage- ment similar to an ag...

Ngày tải lên: 07/08/2014, 16:20

... a. s.l.) 2 Mat Mean annual temperature ( ◦ C) 3 Map Mean annual precipitation (mm yr −1 ) 4 Pevap Actual evapotranspiration divided by potential evapotranspiration, for the site. 5 Sunrad Total ... analysis. Variable No. Abbreviation of variable Description of variable Response variable 1 DAP Days after planting to when divergence first detected. Site related explanatory variables 1 Alt Altit...

Ngày tải lên: 07/08/2014, 16:21