Fertilization has little effect on light-interception efficiency of Picea abies shoots
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چکیده
منابع مشابه
Fertilization has little effect on light-interception efficiency of Picea abies shoots.
We investigated effects of nutrient availability on shoot structure and light-interception efficiency based on data from control (C) and irrigated + fertilized (IL) trees of Norway spruce (Picea abies (L.) Karst.). The sampling of 1-year-old shoots was designed to cover the variation in canopy exposure within the live crown zone, where current-year shoots were still found. Canopy openness was u...
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Where there is sucient water storage in the soil the water potential Wx in shoots of Norway spruce [Picea abies (L.) Karst.] is strongly governed by the vapour pressure de®cit of the atmosphere, while the mean minimum values of Wx usually do not drop below ÿ1:5 MPa under meteorological conditions in Estonia. If the base water potential Wb is above ÿ0:62 MPa, the principal factor causing wa...
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VALERIA RADULESCU1*, CRINA SAVIUC2, CARMEN CHIFIRIUC2, ELIZA OPREA3, DIANA CAROLINA ILIES1, LUMINITA MARUTESCU2, VERONICA LAZAR2 1University of Medicine and Pharmacy “Carol Davila”, Faculty of Pharmacy, Department of Organic Chemistry, 6 Traian Vuia, 020956, Bucharest, Romania 2University of Bucharest, Faculty of Biology, Department of Botany and Microbiology, Portocalelor Al., 060101, Buchares...
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This work develops methods to account for shoot structure in models of coniferous canopy radiative transfer. Shoot structure, as it varies along the light gradient inside canopy, affects the efficiency of light interception per unit needle area, foliage biomass, or foliage nitrogen. The clumping of needles in the shoot volume also causes a notable amount of multiple scattering of light within c...
متن کاملUmbelliferone in Needles of Picea abies *
Umbelliferone, Quantitative Estimation, Picea abies, Genetic Families A compound showing blue fluorescence under UV-light was isolated from spruce needles and identified as umbelliferone. Structure analysis was based on UV and mass spectroscopy as well as chromatographic comparison with authentic material. Quantitative evaluation by direct measure ment of the fluorescence of the umbelliferone ...
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ژورنال
عنوان ژورنال: Tree Physiology
سال: 2002
ISSN: 0829-318X,1758-4469
DOI: 10.1093/treephys/22.15-16.1185