Báo cáo lâm nghiệp: "Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects on cambioxylophagous fauna" docx

... traps give information influenced by mi- gration of beetles. CONCLUSIONS I. typographus remained dominant species on the majority of sites having high intensity of tree infes- tation mainly along ... understanding of bark beetles spatial distribution. It may be used for practical forest protection only as preliminary information. No environmental factor controlling observed...

Ngày tải lên: 07/08/2014, 03:22

... Supported by Grant Agency of the Slovak Republic, Project No. 2/4159/04. Mineral nutrition in relation to the Norway spruce forest decline in the region Horný Spiš (Northern Slovakia) Ľ. D 1 , ... (3): 93–100 97 lings from the forest nursery planted in the substrate from the declining forest stand, 6 – spruce seedlings from the nurs...

Ngày tải lên: 07/08/2014, 03:22

... conditions. SHORT COMMUNICATION Species composition in low mountain beech (Fagus sylvatica L.) stands in the Bieszczady National Park under the global warming D. S 1 , R. J 1 , G. R 1 , ... in the fir volume and the increase in beech volume was collected. – However, the increasing share of beech, accompa - nied by a decrease...

Ngày tải lên: 07/08/2014, 03:22

... chemical thinning consists in the fact that trees killed by chem- ical treatment and left in the stand to their natural Chemical thinning in blue spruce (Picea pungens Engelm.) stands and its effects ... Institute, Brandýs nad Labem, Czech Republic ABSTRACT: Chemical thinning was applied in blue spruce (Picea pungens Engelm.) stands by the appli...

Ngày tải lên: 07/08/2014, 03:22

... 6215648902, and the Ministry of Agriculture of the Czech Republic, Project QG 60060. Response of the Norway spruce (Picea abies [L.] Karst.) root system to changing humidity and temperature conditions ... difference in the rooting depth of the whole root system (see Rooting depth of the whole root sys- tem). As the result of dis...

Ngày tải lên: 07/08/2014, 03:22

... us- ing engineering structures and drainage and have rather large longitudinal inclines, which in most cases does not allow using them for the passage of wheeled machinery skidders and tractors ... damage to the bearing surface and soil sampling. Before the beginning of investigations the radius of turns, lengths of linear plots, weight and geometrical parameters...

Ngày tải lên: 07/08/2014, 03:22

... is is increasing the interest in multiaged silviculture in North America as in other regions of the world. An additional factor in uencing current management is the attempts to integrate ... (1965). e southern pine forests in Arkansas have also been a focal point for multiaged silvicultural pro- cedures in the North America. e procedure in these loblolly pine/shortl...

Ngày tải lên: 07/08/2014, 04:20

... subtraction of the initial content of available mineral N (for the anaerobic incubation of NH 4 + -N content); N initial ‒ initial content of available mineral N (for the anaerobic incubation of NH 4 + -N ... the mineralization of nitrogen in the sur- face mineral layer of forest soils is diff erent from that in the forest fl oor. Besides, total c...

Ngày tải lên: 07/08/2014, 10:21

... characteristics of GE and GC of analysed samples of short- term stored seed (S) and long-term stored seed (L) in the first year (T1) and the second year of testing (T2) Variant N Germination energy (GE %) Germination ... values of germina- tion energy (GE) and germination capacity (GC) in individual months (M = 1, 2, 3 … 12), in total 10 for short- term (...

Ngày tải lên: 07/08/2014, 10:21

... content in the biomass on the thinned plot represented 8 9–9 2% of the values calculated for the control plot without thinning. On the basis of presented research, which was done within the blue spruce ... years, the investigated substitute blue spruce stand accumulated: N – 336 kg, P – 28 kg, K – 138 kg, Ca – 159 kg, Mg – 28 kg per...

Ngày tải lên: 07/08/2014, 10:21

... difference in the index was confirmed in the spruce virgin forest in the altitudi- nal range of 1,300–1,400 m. e analysis of the structure of the spruce virgin forest in Nefcerka NNR assessed according ... Education of the Slovak Republic, Project No. 0082-06. A change in structural diversity and regeneration processes of the spr...

Ngày tải lên: 07/08/2014, 10:22

... 10.1051/forest:2006029 Original article Population genetics of Norway spruce (Picea abies Karst.) at regional scale: sensitivity of different microsatellite motif classes in detecting differentiation Ivan S a,b * , ... type and mutation rate on the resulting pattern of differentiation. A further source of variation in the estimates of genetic di...

Ngày tải lên: 07/08/2014, 16:20

... involved measurements of RGS and longitudinal drying shrinkage, and were presented in de- tails in previous papers [10, 11]. New data on poplar are also shown, including measurements of RGS and ... contin- uum in behaviour from the “normally” tensile stressed wood to the compression stressed wood. Inside the group of nor- mal wood samples (including compression values),...

Ngày tải lên: 07/08/2014, 16:20

... dependent on the initial vegetation type and on soil seed bank composi- tion. We therefore encourage additional experiments in differ- ent stand and soil types in order to establish the generality of these ... on the considered soil parameters. Both disc and rotary ploughing induced an overall lowering of soil nutrient index and soil compaction, but diffe...

Ngày tải lên: 07/08/2014, 16:20

... 763772 â INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2003071 Original article Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots Christoph ... from the terminal root tip in all species. At 500 mm distance from the tip, periderm thickness had increased to 50 àm in beech and...

Ngày tải lên: 08/08/2014, 01:21