Báo cáo lâm nghiệp: "Interannual variation of soil respiration in a beech forest ecosystem over a six-year study" pps

... growing, beech stand, and stand biomass increased by about 10% each year (unpublished data). An increase in soil respiration in a young slash pine plantation has been ascribed to an increase in ... RESULTS Soil respiration exhibited pronounced seasonal variations with minimal values in winter and high values in early summer Interannual variation of soil respiratio...

Ngày tải lên: 08/08/2014, 01:22

... determined using a six-level scale from 0 to 100% (of foliage damaged area), by 20%. Bud burst data was also assessed in March of years 2004 and 2005 at Areas and in 2005 at Sergude, following a ... a repeated measurement analysis of variance using the SAS MIXED procedure [28]. Clone by site interaction was analyzed combining the leaf spot data of year 2005 in Sergude with...

Ngày tải lên: 07/08/2014, 16:20

... Summary of the variance analysis for each wood density component and ring width, showing their significance and the percentage of total variation due to each source of variation. Sources of variation ... (on average 0.10 g cm −3 , Tab. II) and constant radially. 3.5. Analysis of variation of ring and density components An analysis of variance was made on the ring and dens...

Ngày tải lên: 07/08/2014, 16:20

... detect the patterns of variation in species data that can be explained by management and soil variables, we calculated a Canonical Correspondence Analysis (CCA) [61] using Canoco 4.5 for Windows [62]. ... Statsoft Inc., STATISTICA (data analysis software system), version 6, Statsoft Inc., Tulsa, 2001. [59] Stieperaere H., Fransen K., Standaardlijst van de Belgische vaatplanten, met...

Ngày tải lên: 07/08/2014, 16:20

... higher number of analysed individuals per population in allozyme data that allows to an increasing allozyme differentiation [40], (ii) the dominance of RAPD markers, their biallelism and the interpretation ... disturbed and fragmented as a result of an increasing clearing, over- grazing and overexploitation. Myrtle habitat fragmentation re- duced genetic diversity of the species,...

Ngày tải lên: 07/08/2014, 16:21

... ear- lywood density followed an oscillating pattern of variation. In their study of families of radiata pine established in several sites in New Zealand, Cown and Ball [8] also measured average ... Vargas-Hernandez [34] observed that area weighted ED and LD increased with cambial age in 60 families of coastal Douglas-fir that were analyzed at age 15. A similar pattern was r...

Ngày tải lên: 08/08/2014, 00:21

... Galicia. Actually, maritime pine is the most commonly planted species in this region with an annual plantation rate of about 7 000 ha [4]. A breeding pro- gram for maritime pine in Galicia was started ... Curculionidae) on Pinus pinaster Ait. was evaluated in a fertilization × progeny test in Galicia (NW Spain) to determine the genetic variation among families and the possibil...

Ngày tải lên: 08/08/2014, 00:22

... 10.1051 /forest: 2004032 Original article Allozyme variation of Pinus pallasiana D. Don in Natural Crimean populations and in plantations in technogenously-polluted areas of the Ukraine steppes Ivan ... pine into three varieties growing in different areas: var. pontica Koch. in Crimea, var. caramanica Loud. in Anatolia and var. Fenzeii Ant. and Ky on the Taurus range. Dalli...

Ngày tải lên: 08/08/2014, 01:21

... 1999). Paradoxically, in agar media it grows best if there is manifest attenuation and acidification as a result of hydrolysis of the agar. Overall, the degree of hydroly- sis of agar and the characteristics ... 4.5. RESULTS Comparing cultures in sand and in agar After the completion of cultivation, it was de- termined that when using sand, the starting pH of 5.8 remaine...

Ngày tải lên: 07/08/2014, 03:22

... final cutting of the remaining stands was carried out in at least two Table 5. Reforestation in the Vrapač National Nature Reserve in the period 1877–1893 Year Reforestation (ha) Filling of ... Republic ABSTRACT: e paper deals with historical development of floodplain forests in the area of Vrapač National Nature Reserve in the floodplain of the Morava River (Protected...

Ngày tải lên: 07/08/2014, 10:21