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Type of publication: Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Agronomija / Agronomy (A001)
Author(s): Simanavičius, Lukas;Viršilė, Akvilė
Title: The effects of led lighting on nitrates, nitrites and organic acids in tatsoi
Is part of: Research for rural development 2018 : annual 24th international scientific conference, May 16-18, 2018, Jelgava: proceedings. Jelgava: Latvia University of Life Sciences and Technologies, 2018, vol. 2
Extent: p. 95-99
Date: 2018
Note: eISSN 2255-923X
Keywords: Brassica rapa;controlled environment;light emitting diodes
Abstract: Progressive type of controlled environment horticulture, such as plant factories, enables the precise control of cultivation environment parameters. The experiments were performed at the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry in the year of 2017. The aim of this study was to evaluate the effects of different irradiance levels produced by solid state light-emitting diodes (LEDs) on nitrates, nitrites and organic acids contents in tatsoi (Brassica rapa var. rosularis), cultivated in the controlled environment chambers. Plants were cultivated under combinations of red (640, 660 nm), blue (445 nm) and far red (731nm) LEDs at photosynthetic photon flux density (PPFD) level of 200 μmol m-2 s-1. At the pre-harvest stage, PPFD was increased to 300 μmol m-2 s-1 by elevating the fluxes of different spectral components for 3 days. The contents of nitrates, nitrites and organic acids were evaluated. The results propose the metabolic interface between nitrates, nitrites and organic acids in green vegetables, sensitive for lighting conditions. The higher intensity of LED light at pre-harvest stage led to decreased contents of nitrates in tatsoi. The increased intensity of blue 455 nm light led to lower contents of nitrates and higher of organic acids in comparison to red 640 nm. In addition, the increased intensity of red 640 nm led to significantly higher (p≤0.05) contents of nitrites. The target management of LED light spectra and intensity at pre-harvest stage could be used to reduced nitrates and increased organic acids in tatsoi
Affiliation(s): Lietuvos agrarinių ir miškų mokslų centras
Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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