Journal of Forest Science, 2003 (vol. 49), issue 4
Biological and chemical amelioration effects on the localities degraded by bulldozer site preparation in the Ore Mts. - Czech Republic
V.V. Podrázský, J. Remeš, I. Ulbrichová
J. For. Sci., 2003, 49(4):141-147 | DOI: 10.17221/4689-JFS 
Biological and chemical (fertilising, liming) amelioration are among the principal tools used to restore degraded sites. These techniques were also used on the Ore Mts. plateau on plots prepared by bulldozing. We evaluated the impact of these amelioration techniques by measuring tree species primary production and humus form restoration. Begun in 1983-1985, this project studied growth reaction of forest stands by measuring height and diameter increment, for the following species (blue spruce Picea pungens Engelm., European larch Larix decidua Mill., lodgepole pine Pinus contorta Dougl., Eastern white pine Pinus strobus...
Hymenoptera (Aculeata) in birch stands of the air-polluted area of Northern Bohemia
E. Kula, P. Tyrner
J. For. Sci., 2003, 49(4):148-158 | DOI: 10.17221/4690-JFS
The Hymenoptera (Aculeata) fauna was studied in birch stands (Betula pendula Roth) of colder areas of Northern Bohemia using the method of Moericke's yellow traps. Altogether 159 species were trapped; the most important were Andrena lappona, Vespula vulgaris, Halictus sp., Trypoxylon minus and Vespula rufa. Only 12.7% of the species are widely spread in this ecosystem type. In 1990-1994 and in 1995-1999 we compared the abundance of the fauna and discovered that many species of the families Apidae and Sphecidae receded from the birch stands due to changing site conditions (light, weed infestation).
Bionomics and harmfulness of Tetraneura ulmi (L.) (Aphidinea, Pemphigidae) in elms
J. Urban
J. For. Sci., 2003, 49(4):159-181 | DOI: 10.17221/4691-JFS
The paper deals with the bionomics and harmfulness of a common cecidogenous aphid Tetraneura ulmi L. (Pemphigidae) which showed outbreak in elms in Moravia in 2002. The majority of examinations was conducted in Ulmus minor in a riparian and accompanying stand of the Svitava river, Bílovice nad Svitavou near Brno. The aphid was most abundant in U. minor, much less in U. glabra and never occurred in U. laevis. In one leaf, about 2.5 (max. 16) galls were found there (at Čejkovice near Znojmo, as much as 21 galls). Fundatrices hatched from 15 April to 7 May. Through the areal sucking...
A contribution to the effect of liming on forest soils: review of literature
P. Formánek, V. Vranová
J. For. Sci., 2003, 49(4):182-190 | DOI: 10.17221/4692-JFS
Extensive forest areas were ameliorated by large-scale liming in the last years in order to prevent proceeding acidification and degradation of forest soils. The hitherto knowledge of liming effects on the function of forest soils still appears insufficient for an unambiguous evaluation. Sorption properties of soils and acidity are favourably affected by liming and the favourable effect is usually manifested in the layer of forest floor humus and in mineral soil within ten years. Reduction of soil acidity stimulates development of a bacterial component of microflora, soil edaphon, and good prerequisites are formed for a release of nutrients from soil...