Báo cáo lâm nghiệp: "Radial-growth and wood anatomical changes in Abies alba infected by Melampsorella caryophyllacearum: a dendroecological assessment of fungal damage" ppt

... radial growth of asymptomatic and symptomatic trees. 294 A. Solla et al. swelling. It has been reported that the disappearance of A. alba from Alpine stands in Italy may be partially caused by ... swellings and brooms (± SD) caused by Melampsorella caryophyllacearum on Abies alba trees located in Irati forest (Navarra, Spain) according to their competitive status (su...

Ngày tải lên: 08/08/2014, 00:22

... located in the stand of Norway spruce (Picea abies) of total area 3.98 ha, the plot area is 0.191 ha. e third plot is situated in the birch stand (Betula verrucosa) of total area 0.7 ha, the measured ... concentration was found in the Douglas fir stand and especially in the pine one. Interspecific demands of particular tree species are probably demonstrated in this...

Ngày tải lên: 07/08/2014, 03:22

... with a total area of 0.75 ha (Fig. 1) were mapped within the range of 22 individual beeches (their average spacing was about 16 m) on an area of 1.9 ha. Ap- proximately 40% of the stand area ... within the fencing and outside of it. e basic spatial statistic of the point layer of re- generated individuals in “Telc” and “Ansprung” was calculated with the assistance...

Ngày tải lên: 07/08/2014, 10:21

... total. Samples of 46 plants were randomly extracted from all research plots on May 9, 2006. Samples were cleaned of soil and put into labelled plastic bags and they were taken into a laboratory for allometric ... been a long tradition in the Czech stand- ards to fix up the necessary quantitative and quali- tative parameters for seedlings and plants planted out. However, un...

Ngày tải lên: 07/08/2014, 03:22

... were sampled and stored in a deep freezer until analysis. 2.3. Molecular analyses The surface layer, including mostly fungal mycelia and a small amount of degraded wood, was scraped from each sample. ... index values. Scores for fungal communities in the sampling dates and tree species, for all stands and dates together, and bacterial diversity after 2 years are given...

Ngày tải lên: 07/08/2014, 16:20

... GARC A ESTEBAN a *, Joseph GRIL b , Paloma DE PALACIOS DE PALACIOS a , Antonio GUINDEO CASASÚS a a Cátedra de Tecnolog a de la Madera, Departamento de Ingenier a Forestal, Escuela Técnica ... strain Tables III and IV give the swelling strains in radial and tan- gential directions, respectively, calculated using equation (2), for both non-aged and aged wood. In all cases...

Ngày tải lên: 08/08/2014, 00:21

... situated at an altitude of 452 m and at a distance of 13 km from the analyzed forest stands in Moravec and 30 km from the analyzed forest stands in Radiměř). e presented data are the values ... date of mean air temperatures of 0°C was gradually shifted backwards up to 18 days, and the ending date was shifted towards by 7 days. Aligned annual total precipitation amo...

Ngày tải lên: 07/08/2014, 03:22

... spe- cies was investigated in each height regeneration class as well as the number of trees damaged by browsing of terminal shoot, by fraying or by peeling and browsing by ungulate game. Peeling and ... classified into one category. During fraying trees are damaged by antlers of ungulate game. e assessment of peeling and browsing intensity was carried out in...

Ngày tải lên: 07/08/2014, 03:22

... (2003): Growth and biomass partitioning of Fagus sylvatica L. and Quercus robur L. seedlings in response to shading and small changes in the R/FR-ratio of radiation. Annals of Forest Science, ... leaves, larger total leaf area and higher dry matter of leaves per 1 plant were de- termined in seedlings grown in the sun. The average area of one leaf was larger in...

Ngày tải lên: 07/08/2014, 10:21

... accompanied by aggradation stage of the middle layer. Advanced natural regen- eration mainly of beech and sporadical silver fi r, sessile oak, rowan, sycamore maple, Norway maple, small-leaved linden, ... and structure variability and small-scale texture – the smallest of the zonal Central European natural for- ests.  ese developmental trends are result of maxi- mal shade...

Ngày tải lên: 07/08/2014, 10:21