Báo cáo lâm nghiệp: "Tension wood occurrence in three cultivars of Populus × euramericana Part I: Inter-clonal and intra-tree variability of tension wood" ppsx
Báo cáo lâm nghiệp: "Tension wood occurrence in three cultivars of Populus × euramericana. Part I: Inter-clonal and intra-tree variability of tension wood" ppsx
... most planted cultivars in Valley of Cinca (Spain): I214, Luisa Avanzo and I-MC, as well as the intra-tree variability. We present here the distribution of tension wood in nine stems of poplar rapidly ... Lean in red alder (Alnus rubra): growth stress, tension wood, and righting response, Can. J. For. Res. 26 (1996) 1951–1956. Tension wood variability in th...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "On the occurrence of web-spinning sawflies of the genus Cephalcia (Hymenoptera, Pamphiliidae) in the Czech Republic" potx
... 57–62 Because of the lack of a recent survey of Cephal- cia species in the Czech Republic, the goals of this study were (i) to monitor web-spinning sawflies liv- ing on spruce in mountainous regions and ... and traps were operated in both forest types in parallel (Table 1). e traps were installed from the end of April to the end of October and emptied in two-we...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " Natural forest regeneration in spruce monocultures in the Ukrainian Beskids – prognosis by FORKOME model" ppt
... hospodaření Corresponding author: Prof. Dr. hab. I K, Catholic University in Lublin, Faculty of Mathematics and Natural Sciences, Department of Landscape Ecology, Konstantynów 1H, 20-708 Lublin, Poland tel.: ... slope of the mountain (inclination 6°–8°) at the alti- tude of 650–652 m a.s.l. Brown soils are characteris- tic of these plots. ere are rich euthropic conditi...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Multifunctional forestry practices as a land use strategy to meet increasing private and public demands in modern societies" ppt
... (6): 290–298 and managing responsibly. Openness and flexibility in reacting to changing societal needs and values, understanding of the ecological, social and economic drivers determining their ... addresses the time perspective (permanent and continuing), the kinds of activities (maintaining and creating), the objectives (needs and goals), and the qualifying criteria...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Short Communication Differences in the structure, species composition and diversity of primary and harvested forests on Changbai Mountain, Northeast China" ppsx
... after harvesting. By initially decreasing over- storey density and basal area, canopy openings created by logging triggered a rapid increase in recruitment into the seedling and sapling layers. ... patterns and associations of Pinus ko- raiensis and Tilia amurensis in broad-leaved Korean pine mixed forest in Changbai Mountain. Chinese Journal of Applied Ecology, 18: 1681...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Coppice-with-standards in floodplain forests – a new subject for nature protection" potx
... biocentres and biocorridors in today’s floodplain forests. e aim of this paper is to present the results of the inventory dealing with the present occurrence of the coppice-with-standards system in ... as the introduc- tion of spruce as covering for the pheasants and the establishment of large areas of agricultural land. In 1990, following the declaration of the...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Red deer density in the air-polluted area of forest ecosystems in the Krušné hory" pdf
... values of the estimate of the red deer population density were deter- mined in the Jelení hora hunting district in 2007 and 2008 using the FSC method, viz 24 ± 23 individuals·km –2 (95% CI) and ... the particular plots and dates of particular visits are shown in Table 1. In the Jelení hora hunting district in 2007, we found out a statistically signifi cant diff erence...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China" pps
... 5.5, and 4.3 in rainwa- ter, 6.0, 6.6, 6.2, and 4.3 in throughfall and 7.0, 6.9, 6.1, and 4.7 in sub-throughfall in spring, summer, autumn, and winter, respectively. Ion exchange in canopies and ... pH of rainwater in summer (4.3) and winter (4.3) was very low, being a little bit higher in spring (4.7). As said, rain quantity in spring and summer accounted fo...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Unexpected disproportion observed in species composition between oak mixed stands and their progeny populations" pdf
... trend in Q. petrea in a particular context could be regarded as part of its strategy in progressively replacing Q. robur in successional forest development. Differences in sex allocation in dioecious ... because the threat of losing large amounts of pollen during pollination is high. In- creasing production of pollen is a strategy to improve repro- ductive success. In...
Ngày tải lên: 07/08/2014, 16:21
Báo cáo lâm nghiệp: " Narrow genetic base in forest restoration with holm oak (Quercus ilex L.) in Sicily" docx
... number of trees. 4.2. Factors involved in genetic composition of seedlings Practical considerations usually determine the selection of seed harvest site in Sicily, including nursery proximity and road ... Sicily. In the case of Q. ilex acorn harvesting from Piano Zucchi forest, an increase in the number of seed trees and distance between trees is recommended. In consid...
Ngày tải lên: 07/08/2014, 16:21