Báo cáo lâm nghiêp: "Erste Hinweise für die waldbauliche von Behandlung Araukarienplantagenwäldern" pdf

... S PIECKER (1983) in Hinblick auf die Behandlung von Eichenbeständen dargelegt hat - sehr vorteilhaft. Dies gilt auch für die Behandlung von Araukarienplantagen. Aufgrund ihrer ... Ziel- durchmesser von 40 cm im Alter 50 Jahre ergibt sich eine Stammzahl zwischen 150 und 180 je ha. 3. Vorläufige Empfehlungen für die Behandlung von Ara...

Ngày tải lên: 09/08/2014, 06:21

... Somatic embryos from callus of Salix viminalis L. L. Grönroos, S. von Arnold T. Ericsson Department of Physiological Botany, Uppsala University, Uppsala,

Ngày tải lên: 09/08/2014, 04:20

... forest root dynamics. Pedobiologia, 18, 289-295. BERG B., 1981. Litter decomposition studies within SWECON. Data on weight loss and organic chemical composition. Report 101, ... the allo- cation of resources to fine roots and on their decomposition when they die. Although the carbon pools are linked directly, we have been unable to determine ......

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Ngày tải lên: 07/08/2014, 03:22

... long-standing studies of “forest pests”, S (1975) considers the geobiocenological units, AVZ and groups of forest types, as suitable frames for autecological studies of species. ese studies can ... found in the 7 th AVZ Fig. 1. DCA analysis of psocid biotopes (axis x – gradient of altitudinal vegetation zones, q – gradient of hydricity) 0 50 100 150 200 250 300 350 0 50 100 150 2...

Ngày tải lên: 07/08/2014, 03:22

... práce, 8: 1–154. PATOČKA J., KRIŠTÍN A., KULFAN J., ZACH P., 1999. Die Eichenschädlinge und ihre Feinde. Zvolen, Institut für Waldökologie der Slowakischen Akademie der Wis- Fig. 3. Flight activity ... and added some notes to biology of this species. MATERIAL AND METHODS e flight activity was studied by the Malaise trap of T (1972) type. During years 2005 and 2006, the traps were...

Ngày tải lên: 07/08/2014, 03:22

... two vegetation periods. Feeding of white grub developing in older stands does not cause tree dieback. In terms of forest protection it is there- fore important to explore, which climate, ecologi- cal ... lay eggs in the young forest plantations, or re- duce it. e objective of the study and the studied region e objective of the study was to evaluate the extent of damage caused by white gr...

Ngày tải lên: 07/08/2014, 03:22

... 68–71. LOBINGER G., SKATULLA U., 1996. Untersuchungen zum Einfluss von Sonnenlicht auf das Schwärmverhalten von Borkenkäfern. Anzeiger für Schädlingskunde Pflanzen- und Umweltschutz, 69: 183–185. MIHALCIUC ... Belgica, 101: 7–14. PRIEN S., STÄHR F., KOST F., WITTIG T., 1996. Befallsdispo- sition von Fichtenbeständen für Borkenkäfer bei Vorliegen neuartiger Waldschäden im üringer...

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... ȱ=ȱ5 a a a a a b a a a a b a a a a 0 10 20 30 40 50 60 70 80 Sizeȱofȱmating chamberȱ(mmȱ) Lenghtȱofȱmother tunnelȱ(mm) Numberȱofȱeggsȱper motherȱtunnel Numberȱofȱlarvae perȱmotherȱtunnelȱ Lenghtȱofȱlarvae tunnelȱ(mm) Control 15Gy 30Gy 2 J. FOR. SCI., 53, 2007 (Special Issue): 31–37 37 R e fe re nc es HEIDGER C.M., 1994. Die Ökologie und Bionomie der Borkenkäfer-Antagonisten Thanasimus form...

Ngày tải lên: 07/08/2014, 03:22

Ngày tải lên: 07/08/2014, 03:22