پیوندهای مفید
آمار
| تعداد نشریات | 31 |
| تعداد شمارهها | 748 |
| تعداد مقالات | 7,108 |
| تعداد مشاهده مقاله | 10,240,970 |
| تعداد دریافت فایل اصل مقاله | 6,898,453 |
Some criteria of regeneration density in young beech populations | ||
| Caspian Journal of Environmental Sciences | ||
| مقاله 10، دوره 10، شماره 1، فروردین 2012، صفحه 61-66 اصل مقاله (271.92 K) | ||
| نویسنده | ||
| Kh Sagheb-Talebi* | ||
| Research Institute of Forests and Rangelands (RIFR), P.O. Box 13185-116, Tehran, Iran | ||
| چکیده | ||
| Some criteria of density in beech saplings were studied in various forest associations (mainly Galio odorati-Fagetum typicum) growing in the submontane region near Zurich (Swiss Central Plateau). The sample plots were established in regeneration gaps resulting from Swiss irregular shelter wood system (Femelschlag). Five sample plots, each 2x2m in 3 transects (a total of 15 plots in each gap, x 10 gaps), were laid out from the center to the edge of the gap and under the old growth stand in the upper, middle and lower parts of the gap. Three collective criteria (i) number of saplings (Nm-2), (ii) mean distance of saplings and (iii) crown competition factor and one individual criterion (growth space) were investigated within the sample plots. Results showed that the density of beech saplings was not homogenous. The number of saplings (Nm-2) had wide amplitude, which varied between 2.5 and 54.8 and the mean distance of saplings varied between 14.5 and 68.0 cm. The crown competition factor varied between 1 (100%) and 5 (500%) indicating five times of overlapping in crown space of saplings, while the growth space of the studied beech saplings varied between 1.2 and 12.0. | ||
| کلیدواژهها | ||
| Beech؛ crown competition factor؛ density؛ growth space؛ Regeneration | ||
| مراجع | ||
|
Allgaier, B. (1991) Untersuchung einer Naturverjüngung in Femelstellung und deren Entwicklungsdynamik unter Einbezug von biotischen und abiotischen Einflussfaktoren am Beispiel Bislikerhau/Unteraffoltern. Diplomarbeit an der Professur Waldbau, D-WAHO, ETH, Zurich, unpublished, 47p.
Barnes, B.V., Zak, D.R., Denton, S.R. and Spurr, S.H. (1998) Forest ecology. 4thedition. John Wiley & sons, Inc. 774p.
Biging, G.S. and Dobbertin, M. (1995) Evaluation of competition indices in individual tree growth models. Forest science, 41(2), 360-377.
Cancino, J. (2005) Modelling the edge effect in even-aged Monterey pine (Pinus radiata D. Don) stands. Forest Ecology and Management, 210 (1-3), 159-172.
Condés, S. and Sterba, H. (2005) Derivation of compatible crown width equations for some important tree species of Spain. Forest Ecology and Management, 217(2-3), 203-218.
Ebert, H.P. and Deuschle, R. (2000) Die Baumkrone als Maßstab für den Zuwachs von Fichte. Forst Holz, 55 (14), 452-454.
Hallé , F. and Oldeman, R.A.A. (1970) Essai sur l'architecture et la dynamique de croissance des arbres tropicaux. Paris, Masson, 178p.
Krajicek, J.E., Brinkman, K.A. and Gingrich, S.F. (1961) Crown competition: A measure of density. Forest Science, 7, 35-42.
Miller, A.D. (1953) Factors affecting the growth and form of young beech at Gardiner forest, Wiltshire. Forestry, 26(2), 111-122.
Monserud, R.A. and Sterba, H. (1996) A basal area increment model for individual trees growing in even- and uneven-aged forest stands in Austria. Forest Ecology and Management, 80(1), 57-80.
Nyland, R.D. (1996) Silviculture, concepts and applications. McGraw-Hill, Forestry series. 633p.
Otto, H.J. (1994) Waldökologie.Verlag Eugen Ulmer. 391p. Page,
L.M. and Cameron, A.D. (2006) Regeneration dynamics of Sitka spruce in artificially created forest gaps. Forest Ecology and Management, 221 (1-3), 260-266.
Reid, R. (2006) Diameter-basal area ratio as a practical stand density measure for pruned plantations. Forest Ecology and Management. Article in press, corrected proof-note to users.
Rollof, A. (1986) Morphologische Untersuchungen zum Wachstum und Verzweigungssystem der Rotbuche (Fagus sylvatica L.). Mitteilungen der Deutschen Dendrologischen Gesellschaft, 76: 5-47.
Sagheb-Talebi, Kh., 1995. Study of some characteristics of young beeches (Fagus sylvatica L.) in the regeneration gaps of irregular shelterwood system (Femelschlag). In: Madsen, S.F. (ed.) Genetics and Silviculture of beech. Denmark. Forskingsserien, Nr. 11: 105-116.
Schuler, J.L. and Robinson, D.J. (2006) Stand development and growth responses of 1- and 3-year-old natural upland hardwoods to silvicultural treatments. Forest Ecology and Management, 232 (1-3), 124-134.
Schütz, J.P. (1984) Zur Kontrolle der Bestandesdichte und der Durchforstungsstärke. Schweiz. Zeitsch. Forstw. 135 (2), 113-122.
Schütz, J.P. (1990) Sylviculture 1: Principes d'education des forêts. Lausanne, Press polytech. et uni. romandes. 243p.
Schweiger, J. and Sterba, H. (1997) A model describing natural regeneration recruitment of Norway spruce (Picea abies (L.) Karst.) in Austria. Forest Ecology and Management, 97(2), 107-118.
Tabbush, P.M. and White, I.M.S. (1988) Canopy closure in Sitka spruce – the relationship between crown width and stem diameter for open grown trees. Forestry, 61 (1), 23-27.
Vanclay, J.K. (2006) Experiment designs to evaluate inter- and intra-specific interactions in mixed plantings of forest trees. Forest Ecology and Management, article in press, corrected proof – note to users.
Wolf, A. (2005) Fifty year record of change in tree spatial patterns within a mixed deciduous forest. Forest Ecology and management, 215 (1-3), 212-223. | ||
|
آمار تعداد مشاهده مقاله: 1,900 تعداد دریافت فایل اصل مقاله: 1,170 |
||