Journal of Forest Science, 2014 (vol. 60), issue 7

Effects of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) on understorey layer species diversity in managed forestsOriginal Paper

V. Podrázský, A. Martiník, K. Matějka, J. Viewegh

J. For. Sci., 2014, 60(7):263-271 | DOI: 10.17221/49/2014-JFS  

In total, 67 parallel plots were chosen from the database of 153 phytosociological relevés made in the Douglas-fir and parallel Norway spruce, European Beech and oak-dominated stands to find influences of this introduced tree species on the understorey layer in totally 12 localities in the whole Czech Republic territory. Douglas-fir stands influence their habitats, which was indicated by species composition changes in the ground vegetation, as well as by abundance and dominance of particular species. Douglas-fir cultivation increases species diversity of the stands, but decreases their abundance. Described differences in understorey are not so noticeable...

Impact of interspecific relations between native red deer (Cervus elaphus) and introduced sika deer (Cervus nippon) on their rutting season in the Doupovské hory Mts.Original Paper

Z. Macháček, S. Dvořák, M. Ježek, D. Zahradník

J. For. Sci., 2014, 60(7):272-280 | DOI: 10.17221/47/2014-JFS  

The behaviour of sika and red deer during the rutting season is highly variable in relation to vocalization, habitat preference during the rut, and onset and termination of rutting. The red deer is a native species in Central Europe, but the areas where it lives in sympatry with the introduced sika deer have been increasing in the last three decades. Such situation can be found in the Doupovské hory Mts., where sika deer has been intensively spreading. Hybridization between the two species and changes in behaviour are the most important problems. In this study we prove the shift in the rutting period shown by both species. To evaluate the shift in...

Germination and emergence response of specific Douglas fir seed lot to different temperatures and prechilling durationOriginal Paper

A. Martiník, K. Houšková, E. Palátová

J. For. Sci., 2014, 60(7):281-287 | DOI: 10.17221/11/2014-JFS  

One of the critical points of Douglas fir seedling production is to optimize the time of sowing and length of pre-sowing treatment. Germination and emergence of Douglas fir seed lot of the Czech origin (CZ-2-2A-DG-1740-6-3-P) were observed in simulated warm and cold conditions in two phytotrons for 3 months. Before this procedure the seeds were exposed to different prechilling duration. The temperature in control conditions of phytotrons was stable for 28 days and then it was increased: 11, 13, 17°C in cold phytotron and 13, 17, 20°C in the warm phytotron. Seeds without stratification and stratified for 3, 5, 7, 9 and 16 weeks were tested. The laboratory...

Investigation of Douglas-fir provenance test in North-Western Bulgaria at the age of 24 yearsOriginal Paper

K. Petkova, M. Georgieva, M. Uzunov

J. For. Sci., 2014, 60(7):288-296 | DOI: 10.17221/12/2014-JFS  

A comparative analysis of growth rate and health condition of 54 Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) provenances was conducted at the age of 24 years. The provenance test was established in 1990 with 3-year-old (3+0) seedlings planted in a 2 × 2 m plot design and two replications. The provenances which were studied originated from North America and were separated into coastal, continental and Western Cascade groups. In 2011 the growth rate was studied in terms of height, diameter at breast height and stem volume. The health condition was assessed by the evidence of symptoms and degree of defoliation caused by the fungi Phaeocryptopus...

Economic Impact of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) production in the Czech RepublicOriginal Paper

K. Pulkrab, M. Sloup, M. Zeman

J. For. Sci., 2014, 60(7):297-306 | DOI: 10.17221/27/2014-JFS  

The article addresses the issues of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) production in the Czech Republic (CR). Our analysis shows that the tree species can occupy 149,616-163,713 ha in the CR (with respect to ecological limits set by the Czech legislation). The potential economic effect expressed by the gross yield of forest production might be higher by 27-30 million EUR.yr^-1. The results of the analysis support the forest owners' interest to extend Douglas-fir production in the CR, similarly like it has been extended systematically in all European countries where natural conditions allow.