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Type of publication: Tezės kituose recenzuojamuose leidiniuose / Theses in other peer-reviewed publications (T1e)
Field of Science: Agronomija / Agronomy (A001)
Author(s): Laužikė, Kristina;Samuolienė, Giedrė;Uselis, Nobertas
Title: The effect of light penetration on the changes of photosynthesis indices in apple tree leaves
Is part of: Agrosym 2018 [elektroninis išteklius] : IX International Scientific Agriculture Symposium, Jahorina, 4-7 October 2018, Bosnia and Herzegovina: book of abstracts / University of East Sarajevo [et al.]. East Sarajevo : Faculty of Agriculture, 2018
Extent: p. 290-290
Date: 2018
Keywords: apple tree;light penetration;growth regulating
ISBN: 9789997671851
Abstract: The impact of light penetration into crown and the effect of seasonality and growth technology on photosynthetic behavior were analyzed. Apple cultivar ‘Rubin’ was grafted onto dwarfing rootstock P60 and different growth regulating methods were used (pruning, trunk incision, plant growth regulator). Nitrogen balance index and photochemical reflectance index were measured in 1.5 m above ground outside the canopy and 0,8 m above the ground deep in the canopy; specific leaf area, fresh and dry weight were evaluated from all canopy. The significantly effect of seasonality on all tested indices was observed. Dry and fresh mass ratio was significantly lower during harvest time compared to results obtained in summer, but specific leaf area was significantly lower in summer time compared to harvest time. Photochemical reflectance index was significantly negatively affected by trunk incision. This index was significantly lower during harvest time compared to summer time, but nitrogen balance index during harvest time was significantly bigger during harvest time. Both indexes, photochemical reflectance and nitrogen balance index, were significantly bigger outside canopy compared to measurements deep in the canopy. Summarizing, it can be stated, that decreasing light penetration into the crown results in the decrease in NBI and PRI. Moreover, seasonality has significant effect on apple tree photosynthetic behaviour
Affiliation(s): Lietuvos agrarinių ir miškų mokslų centro Sodininkystės ir daržininkystės institutas
Lietuvos agrarinių ir miškų mokslų centro filialas Sodininkystės ir daržininkystės institutas
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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