tailieunhanh - Báo cáo lâm nghiệp: "delayed effect of ozone fumigation on photosynthesis of Norway spruce"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: delayed effect of ozone fumigation on photosynthesis of Norway spruce. | 568s Ann. Sci. For. 1989 46 suppl. 568s-572s Forest Tree Physiology E. Dreyer ef al. eds. Elsevier INRA A delayed effect of ozone fumigation on photosynthesis of Norway spruce D. Eamus1 . Barnes2 L. Mortensen3 H. Ro-Poulsen4 and . Davison2 11nstitute of Terrestrial Ecology Bush Estate Penicuik Midlothian EHS6 OQB . Department of Biology Ridley Building The University Newcastle upon Tyne . 3National Agency of Environmental Research Institute of Air Pollution Frederiksborgvej 399 D-4000 Roskilde Denmark and 4Institute of Plant Ecology University of Copenhagen 0 Farimagsyade 2D D 1353 Copenhagen Denmark Introduction Much of the research investigating the effects of gaseous pollutants upon plants has been concerned with dose-response relationships particularly during the period of fumigation or in between the periods of fumigation in the summer. However there is increasing evidence that these pollutants increase plant susceptibility to winter injury Barnes and Davison 1988 Brown etal. 1987 . This is especially problematic for conifers since they maintain needles and some metabolic activity throughout the winter. Indeed there is increasing evidence that the forest decline documented for northeastern and Europe results from the interaction of various abiotic and biotic factors including air pollutants frost and winter dessication Brown et al. 1987 Barnes and Davison 1988 . Anthropogenic ozone production primarily occurs during the summer when tem peratures and light intensity are sufficiently high. Frost and winter dessication are therefore temporally separated from the periods of high ozone concentrations. Consequently if ozone is to influence plant sensitivity to frost it must exert a long-lasting effect. This paper briefly reports the results of an investigation into the long-lasting effects of ozone fumigation upon photosynthesis of Norway spruce. Measurements were conducted in the field 6-7 mo after the cessation of 2 yr summer fumigation with .

• Báo cáo khoa học
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp