Báo cáo lâm nghiệp: "Standing crop, production, on dry, moderate, and wet" pdf
Báo cáo lâm nghiệp: "Standing crop, production, on dry, moderate, and wet" pdf
... roots disintegrate. Standing crop, production, and turnover of fine roots on dry, moderate, and wet sites of mature Douglas-fir in western Oregon D. SANTANTONIO Production Forestry ... 6.5, 6.3, and 4.8 Mg/ha/year for production, 7.2, 72, and 5.5 Mg/ha/year for turnover, and 8.2, 8.0, and 6.9 Mg/ha/year for decomposition on the dry, m...
Ngày tải lên: 09/08/2014, 06:21
Báo cáo lâm nghiệp: "Small mammals of a forest reserve and adjacent stands of the Kelečská pahorkatina Upland (Czech Republic) and their effect on forest dynamics" pps
... reproduction capac- ity and thus also by considerable fl uctuation of the population dynamics, being important consumers and secondary producers in ecosystems. e abil- ity to reach considerable ... intervention into the stand dynamics than the seed consumption. Plantings and cultivated beech stands are reservoirs of populations of domi- nant species of small mammals which can inten-...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Forest visitors’ opinions on the importance of forest operations, forest functions and sources of their financing" docx
... important) Timber Non-timber Hydrological Soil Climate Health-hygienic Nature production production function protection protection function protection function function function function function 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Timber ... protection at the first place, followed by soil conservation, climate pro- tection, hydrological function, health (i.e. recre- ational) function, tim...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Effects of nitrogen on the selection of food by Phyllobius arborator (Herbst)" pot
... nutrition of nitrogen according to conclusions on stress impacts (K, K 2004b, 2005). Changed nutrition or stress could af- fect the quality aspects of food, e.g. the production of secondary ... increased consumption of food in the creation of a fat body in females of Lochmaea caprae (L.) Differences of imagoes in the consumption of food in particular variants cannot be confron...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf
... production to pass on to the next age class, the pine nut production is improved with the prolongation of the rotation length, not only because it is increased, but also the production is concentrated ... taking into account the condi- tion and age distribution of the forest. The 160–180 and the 774 F. Montes et al. to guarantee sustainable management, and is one of the main concerns...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Influence of flooding on growth, nitrogen availability in soil, and nitrate reduction of young oak seedlings (Quercus robur L.)" docx
... Sci. 163 (2002) 117–123. [2] Arnon D.F., Ammonium and nitrate nutrition of barley at different seasons in relation to hydrogen ion concentrations, manganese, copper and oxygen supply, Soil Sci. ... gas dif- fusion and leads to hypoxic conditions. Soil inundation occurs in irrigated soils and heavy rainfall areas and depends therefore on soil characteristics, climatic parameters a...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp:"High-grading effects on Scots pine volume and basal area in pure stands in northern Spain" pot
... site and when the stand was 50 years old on the second one. Site index ranged from 20 to 23 in the first forest experiment and between 17 and 20 in the second according to Rojo and Montero [18] and ... journal online: www.edpsciences.org 16 F. Bravo and G. Montero so our modeling approach is the only one possible in such a situation (one yield measurement and no increment reco...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp:"The extreme drought in the 1920s and its effect on tree growth deduced from tree ring analysis: a case study in North China" ppsx
... correlations existed between adjacent chronolo- gies HHT and JGB (P < 0.001), and remote chronologies BYAB and HHT, XLPI and JGB, XLPI and BYAB (P <0.01) (table II), whereas BYAB and JGB chronologies ... chronologies The parallel behaviour of relatively close chronologies (BYAB and XLPI, HHT and JGB) indicated a general regional synchronization of tree-ring variations. B...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp:"Interaction of initial seedling diameter, fertilization and weed control on Douglas-fir growth over the first four years after planting" ppsx
... concentrations of B and Mn and a decrease in P, Ca, Cu, and Zn, compared with the NF treatment. Differ- ences between the 1F and 2F treatments were found for only B and P. Boron concentration ... in P and K concentrations. No other nutrient concen- tration varied by fertilizer treatment in year one. Foliage concentrations of N, P, K, Ca, S, Mg, and B dropped considerably from y...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp: "Effects of microsite on growth of Pinus cembra in the subalpine zone of the Austrian Alps" docx
... distribution and duration of snow cover [2], which can strongly affect the soil climate (e.g. root zone tem- perature), erosion, moisture and nutrient supply [16, 23]. Radi- ation and temperature ... microsite related to micro-environmental conditions can control growth rate of subalpine trees (question 2 of the Introduction). 5. CONCLUSION We suggest that elevational effects gradually...
Ngày tải lên: 08/08/2014, 01:21