Template-Type: ReDIF-Article 1.0 Author-Name: T. Žid Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Author-Name: P. Čermák Author-Workplace-Name: Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry Brno, Brno, Czech Republic Title: Health condition of spruce stands in the Orlické hory Mts. in relation to climatic, anthropogenic and stand factors Keywords: Picea abies, defoliation, yellowing, deposition, climate Journal: Journal of Forest Science Pages: 1-12 Volume: 53 Issue: 1 Year: 2007 DOI: 10.17221/2082-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/2082-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200701-0001.txt Handle: RePEc:caa:jnljfs:v:53:y:2007:i:1:id:2082-JFS Template-Type: ReDIF-Article 1.0 Author-Name: D.-L. Qiu Author-Workplace-Name: School of Life Science, Xiamen University, P.R. China Author-Workplace-Name: College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, P.R. China Author-Name: P. Lin Author-Workplace-Name: School of Life Science, Xiamen University, P.R. China Author-Name: S. Z. Guo Author-Workplace-Name: College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, P.R. China Title: Effects of salinity on leaf characteristics and CO2/H2O exchange of Kandelia candel (L.) Druce seedlings Abstract: Effects of salinities on leaf characteristics and CO2/H2O exchange of mangrove species Kandelia candel seedlings were studied in a pot experiment. The seedlings grown in salinity of 50‰ caused a strong reduction in the rate of growth, but their leaves were black-green, smaller and less expanded or distorted than those of plants in the control and treatment of 25‰. As compared with control plants, leaves of plants treated with salinity of 25‰ were shiny and smooth. Stomatal number and density under the epidermis in leaves were reduced with the increase of salinity. Mesophyll cells in plants grown in salinity of 50‰ were smallest, 25‰ ranked the second and 0‰ were largest. Their arrangement was compact in 50‰, while in the control it was loose. Cells of the upper epidermis in leaves of control plants were loose and the cell wall was thin while that of 50‰ was more compact and the cell wall was thicker than that of 0‰. Chlorophyll (Chl) (a + b) content μmol/cm2) in plants grown in 50‰ salinity increased significantly compared with that in 0‰, and Chl a/b was also reduced. Carotenoid pigments (Car) increased significantly in different treatments. Photosynthesis (Pn) was significantly inhibited by higher salinity, and the light compensation point of higher salinity leaves increased. Net photosynthetic rate (Pn), stomatal conductance (Cs), and transpiration rate (Tr) were reduced with the increase of salinity while dark respiration (Rd) increased. Keywords: salinity, mangrove, cell structure, photosynthesis, transpiration Journal: Journal of Forest Science Pages: 13-19 Volume: 53 Issue: 1 Year: 2007 DOI: 10.17221/2081-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/2081-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200701-0002.txt Handle: RePEc:caa:jnljfs:v:53:y:2007:i:1:id:2081-JFS Template-Type: ReDIF-Article 1.0 Author-Name: F. Bušina Author-Workplace-Name: Higher Forestry School and Secondary Forestry School of B. Schwarzenberg Písek, Písek, Czech Republic Title: Natural regeneration of Douglas fir (Pseudotsuga menziesii [Mirb.] Franco) in forest stands of Hurky Training Forest District, Higher Forestry School and Secondary Forestry School in Pisek Abstract: Possibilities are assessed of the natural regeneration of Douglas fir under conditions of Hůrky Training Forest District, Higher Forestry School and Secondary Forestry School in Písek, in stand 12C7, forest type 3K5. The stand is situated at an altitude of 430 m above sea level in an area with mean annual temperature 7.3-7.5°C and mean annual total precipitation 550-575 mm. Under the stand dominated by Douglas fir (65 years of age), natural regeneration of the mean density of 53,800 seedlings/ha appeared due to lateral light coming from the north. The highest density of Douglas fir natural regeneration was noticed under the stand 10-14 m from the stand margin. The light penetrating through the marginal stand wall was found to be of greater effect on the density of natural regeneration than the upper shading caused by the parent stand. With this method of regeneration, Douglas fir is less light-demanding than spruce. Height and height increment of advance regeneration were greater in places with sufficient light near the stand margin. Thus, natural regeneration of Douglas fir is successful there giving conditions for the origin of a new generation of the stand with a sufficient proportion of Douglas fir. Keywords: Douglas fir, natural regeneration, parent stand, self-seeding, advance growth, radiation Journal: Journal of Forest Science Pages: 20-34 Volume: 53 Issue: 1 Year: 2007 DOI: 10.17221/2083-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/2083-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200701-0003.txt Handle: RePEc:caa:jnljfs:v:53:y:2007:i:1:id:2083-JFS Template-Type: ReDIF-Article 1.0 Author-Name: P. Bulíř Author-Workplace-Name: Silva Tarouca Research Institute for Landscape and Ornamental Gardening Průhonice, Průhonice, Czech Republic Title: Effects of varying doses of Frisol on European ash (Fraxinus excelsior L.) planted on spoil banks Abstract: Frisol forte (FR F) and Frisol active (FR A) are slow-acting organic fertilisers recommended for reclamation and revitalisation of undeveloped soils and degraded areas. Tentative results of experiments carried out with these products on spoil banks in the CR showed controversial reactions of plants - on the one hand a high mortality of seedlings and a very good growth on the other. Reasons for these disproportions projecting themselves into the welfare of woody plants probably lie in an incorrect dosage of products. Thus, a special long-term experiment was established with the objective to find an optimal dosing to be used in practice for the reclamation process on spoil banks. By the method of measuring and statistical evaluation of height and stem diameter growths it was discovered that the best results were achieved by the combined use of both products with a dosage in the range of 30-60 g FR F + 250 ml FR A/5 l of water/10 seedlings. The discovered dosage is lower than that indicated by the manufacturer and literature. The application of granulated FR F alone was not so effective. The best dosage in this case was also 60 g/seedling. A disadvantage of using the combination of both types of Frisol is that the water required for dissolving the FR A liquid concentrate is not always available in the location being reforested. Keywords: Frisol forte, Frisol active, Silvamix forte, Cererit, European ash, organic fertilisers, fertiliser dosage, reclamation, spoil banks, survival rate and growth, welfare of plants Journal: Journal of Forest Science Pages: 35-40 Volume: 53 Issue: 1 Year: 2007 DOI: 10.17221/2080-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/2080-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200701-0004.txt Handle: RePEc:caa:jnljfs:v:53:y:2007:i:1:id:2080-JFS