Use this url to cite publication: https://hdl.handle.net/20.500.12259/92464
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Leaf optical properties reflect changes of photosynthetic indices in apple trees
Type of publication
Straipsnis konferencijos medžiagoje Web of Science ir Scopus duomenų bazėje / Article in conference proceedings in Web of Science and Scopus database (P1a)
Author(s)
Laužikė, Kristina | Lietuvos agrarinių ir miškų mokslų centras |
Lietuvos agrarinių ir miškų mokslų centras |
Title
Leaf optical properties reflect changes of photosynthetic indices in apple trees
Is part of
Research for rural development 2018 : annual 24th international scientific conference, May 16-18, 2018: proceedings. Jelgava: Latvia University of Life Sciences & Technologies, 2018, vol. 2
Date Issued
Date Issued |
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2018 |
Publisher
Jelgava: Latvia University of Life Sciences & Technologies
Extent
p. 90-94
Field of Science
Abstract
The impact of light penetration into crown and the effect of rootstocks and distance between trees on photosynthetic behaviour were analysed. Apple cultivar ‘Auksis’ was grafted onto dwarfing rootstock P60 and super-dwarfing rootstock P22 and planted at different distances (3 × 1 m, 3 × 0.75 m and 3 × 0.5 m). Nitrogen balance index and photochemical reflectance index were measured at two heights: 0.8 m above ground inside the canopy and 1.5 m above ground outside the canopy; specific leaf area, fresh and dry weight were evaluated from all canopy. The significantly positive effect of dwarfing rootstock P60 on all tested indices was observed comparing to P22 rootstock. Increasing density between trees lead to a decreased specific leaf area and increased nitrogen balance index. The dry and fresh weight ratio and photochemical reflectance index were also significantly affected, but no general tendency was identified. Photochemical reflectance index was not affected by light penetration into canopy, but the nitrogen balance index significantly decreased in the upper part of the canopy. Summarizing, it can be stated that decreasing light penetration into the crown results in an increase in the specific leaf area and photochemical reflectance index, and leads to a decrease in dry and fresh weight ratio and nitrogen balance index.
Type of document
type::text::journal::journal article::research article
Language
Anglų / English (en)
Coverage Spatial
Latvija / Latvia (LV)
Description
eISSN 2255-923X