Báo cáo lâm nghiệp: "Aboveground litter production and bioelement potential return in an evergreen oak (Quercus rotundifolia) woodland near Salamanca (Spain)" docx

... nutrients during the hot season (Ferrés et al,1984) Short note Aboveground litter production and bioelement potential return in an evergreen oak (Quercus rotundifolia) woodland near Salamanca ... quan- tify and determine the temporal and spatial distribution of the litter fall in evergreen oaks and to determine the potential re...

Ngày tải lên: 08/08/2014, 18:21

... techniques [21, 46]. Plant growth and nutritional response data for vector analysis can be manipulated in two modes: (i) an instantaneous mode that com- pares plant samples taken at one point in time to ... fertilization and the need to determine fertility targets in cropping systems. Toxicity increased plant N and P concentration by 17 and 30%, respectively, but reduced growt...

Ngày tải lên: 08/08/2014, 00:22

... corre- sponding to the changes in day length and in daily potential evapotranspiration (data not shown). All during the measurement period, and in both watering regimes, leaf transpiration ... gas-exchange and carbon isotope composition responses to drought in a drought-avoiding (Pinus pinaster) and a drought tolerant (Quercus petraea) spe...

Ngày tải lên: 08/08/2014, 18:21

... des Bois, INRA-CRF, Nancy, France Introduction Our research investigates the relations between the frost-crack occurrence in oaks and some physical and anatomical parameters of ... Winter moisture content and frost-crack occurrence in oak trees (Quercus petraea Liebl. and Q. robur L.) B. Cinotti Station de Recherches sur la Qualite des Bois,...

Ngày tải lên: 09/08/2014, 04:20

... timber and wood fiber source (Moiroud and Capellano, 1982; Turvey and Smeth- urst, 1983); hence, our desire to progress in understanding of its physiology. In an extension ... 239, 54506 Vandœuvre-Iès-Nancy Cedex, and 2 Physiologie V6g6tale, ENSAIA, 54500 !anda°wre-/e5-/B/ancy. France Introduction Among the symbiotic nitrogen-fixing tre...

Ngày tải lên: 09/08/2014, 04:20

... height (D in cm) and total height (H in m). (● ash and ■ wych elm; solid line is ash, dashline is wych elm). 832 G. Alberti et al. reported for spruce, fir and beech stands in Alps and Prealps [3, ... = 0.16 and b = 2.34) and for Ulmus americana (a = 0.082 and b = 2.46). Leaf area index is lower than values reported by Kimmins [10] probably because of the high density of t...

Ngày tải lên: 08/08/2014, 00:22

... types: the “intrinsically linear” type which assumes a multiplicative error in raw data and the “intrinsically nonlinear” type with an additive ran- dom error. In the “intrinsically linear” model, ... can be classified as temperate Mediterranean with rainy winters and warm summers and the total annual rainfall is 1500 mm [27]. Minimum rainfall occurs during the July-August period,...

Ngày tải lên: 08/08/2014, 01:21

... Statistical analy.se.s Significance of changes in standing crops of small and fine roots was determined in a series of statistical tests. First, we calculated means and variances ... Fine-root production - an increase in the amount of live fine roots. This may appear as a simple increase in the standing crop of live fine roots, an...

Ngày tải lên: 09/08/2014, 06:21

... a substantial component of the living environment is a limiting factor for plants, animals and humans themselves. e amount of (surface and ground) water significantly in uences, both in a positive ... significant differences in soil drying between the soil in an adult beech stand and the soil on a weeded open plot. P (1996), in contrast, explained opposite results o...

Ngày tải lên: 07/08/2014, 03:22

... is an increase in increments, with slight interruptions in 1996 and 2000. Another decrease was recorded starting in 2003 and this lasted until the studied period, i.e. 2007. DISCUSSION AND ... 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 the PAST 32 app...

Ngày tải lên: 07/08/2014, 03:22