Báo cáo lâm nghiệp: " Comparison of the hygroscopic behaviour of 205-year-old and recently cut juvenile wood from Pinus sylvestris L " pps
Báo cáo lâm nghiệp: " Comparison of the hygroscopic behaviour of 205-year-old and recently cut juvenile wood from Pinus sylvestris L." pps
... INTRODUCTION Wood is a hygroscopic material because of the presence of -OH groups in the hydrophilic polymers of the cell wall, cel- luloses and hemicelluloses, which are capable of fixing water molecules ... order to study the possible chemical variations and crystallinity indices of the cell wall. The adsorption-desorption loop of the old wood is above t...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Changes in the mycorrhizal status of some mountain spruce forests" potx
... stands de- struction arose after 1982, and in the first half of the 1980s the health conditions of stands gradually wors- ened. In the period after 1988 health improvement and decline of the ... which cor- relates to the moderately improving defoliation. Acknowledgements We would like to thank R F and J L for the field work, especially for...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Nutrients in the aboveground biomass of substitute tree species stand with respect to thinning – blue spruce (Picea pungens Engelm.)" doc
... absorption after the addition of La. From the analyses of data from field measurements of sample trees (number and diameter of branches, stem wood volume, stem bark volume) and data from the laboratory ... (54% of trees, 40% of basal area at the age of 16 years) represented a loss of ca 8.7 thousand kg/ha of total biomass, which contained 53 kg of N, 5...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: " Sicily represents the Italian reservoir of chloroplast DNA diversity of Quercus ilex L. (Fagaceae)" pptx
... reproductively isolated populations because they had completely different haplotypes. These results strongly support the hypothesis of glacial refugia existing in southern Italy, and underline the high ... colonised by one major haplo- type. Additional haplotypes were rarely detected in continental Italy and in the islands of Corsica and Sicily, and no Balkan haplotype was d...
Ngày tải lên: 08/08/2014, 00:21
Báo cáo lâm nghiệp: "Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties" pot
... cations of Ca and Mg from soil. is study aims to compare impact of 20 year last- ing cover of blue spruce, and clear -cut reed Calama- grostis villosa on the former Norway spruce clear -cut to the ... decay of forest stands in the mountain regions of the Czech Re- public in 1970s to 1990s, there was a problem of autochthonous tree species planting failure on t...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Comparison of deposition fluxes on the open area and in mountain spruce stands of different density" pdf
... amount of rainfall on the open area and the amount of throughfall in the spruce stand was found (Fig. 1). In the dense spruce stand the amount of throughfall was higher in comparison with the ... mm and 120 ± 60 and 109 ± 58 mm of throughfall in the dense and sparse spruce stand, respectively. Differences in throughfall and rainfall sums were the resul...
Ngày tải lên: 07/08/2014, 04:20
![Báo cáo lâm nghiệp: "Comparison of morphological and physiological parameters of the planting material of Norway spruce (Picea abies [L.] Karst.) from intensive nursery technologies with current bareroot plants" ppt](https://media.store123doc.com/images/document/2014_08/07/medium_uwg1407381722.jpg)
Báo cáo lâm nghiệp: "Comparison of morphological and physiological parameters of the planting material of Norway spruce (Picea abies [L.] Karst.) from intensive nursery technologies with current bareroot plants" ppt
... 0.05. RESULTS Evaluation of plantable plants Plants of approximately the same height of shoots (ca. 30 cm) were selected for the evaluation. All the other morphological traits were statistically significantly ... ZARCO-TEJADA P., MILLER J.R., 2003. Applications of chlorophyll fluorescence in forestry and ecophysiology. In: Practical applications of chlorophyll fluorescence...
Ngày tải lên: 07/08/2014, 10:22
Báo cáo lâm nghiệp: "Can 13C stable isotope record of Norway spruce tree rings display the effect of environmental conditions" pot
... cellulose because only the cell-wall component contains non- mobile organic elements. But L et al. (2003) and E et al. (2005) suggested that the climate signal in the 13 C values ... Water, Air, and Soil Pollution, 73: 213–223. HARLOW B.A., MARSHALL J.D., ROBINSON A.P., 2006. A multi-species comparison of delta C-13 from whole wood, extractive-free wood a...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Contribution to the knowledge of Clethrionomys glareolus populations in forests of managed landscape in Southern Moravia (Czech Republic)" pot
... Jour- nal of Animal Ecology, 41: 553–556. FLOWERDEW J.R., 1973. e effect of natural and artificial changes in food supply on breeding in the woodland mice and voles. Journal of Reproduction Fertility ... Journal of Animal Ecology, 47: 725–740. GURNELL J., 1985. Woodland rodent communities. Symposia of the Zoological Society of London, 55: 377–411. HOLIŠOVÁ V., 1971 . e...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur" pot
... the wood of standing living trees. Some fungi of the latter group can invade and kill living sapwood causing death to living trees (D et al. 2007), others live in the heartwood of living ... mark- edly petiolate leaves; the lamina is elliptic or elliptic- lanceolate, largest in the bottom half with pointed lobes and elongated upper part (K 1990; M 2006)....
Ngày tải lên: 07/08/2014, 03:22