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Production system and harvesting stage influence on nitrate content and quality of butterhead lettuce


Citation

Yosoff, Siti Fairuz and Tengku Muda Mohamed, Mahmud and Parvez, Anwar and Ahmad, Siti Hajar and Mohamad Ghazali, Farinazleen and Hassan, Hamizah (2015) Production system and harvesting stage influence on nitrate content and quality of butterhead lettuce. Bragantia, 74 (3). pp. 322-330. ISSN 0006-8705; ESSN: 1678-4499

Abstract

Leafy vegetables such as lettuce grown under different production systems may accumulate different concentrations of nitrate which may reach to the levels potentially toxic to humans. Moreover, nitrate accumulation varies in various plant parts and physiological age of the plant. Therefore, to determine the effect of production system and harvesting stage on nitrate accumulation and quality of butterhead lettuce, a study was conducted considering two lettuce production systems namely hydroponic and organic, and four different harvesting stages such as 35, 38, 41 and 44 days after transplanting (DAT). The experimental design was complete randomized design (CRD) with four replications. Hydroponic and organic systems performed similar in terms of yield, quality and nitrate content of butterhead lettuce. Delaying harvesting can not only increase yield but also can minimize nitrate accumulation and health hazard risk as well. Delay in harvesting stage may result in quality deterioration of lettuce and increased production cost. Thus, a compromise is necessary to consider 41 DAT as the optimum stage to harvest butterhead lettuce with significantly higher reduction of nitrate content in both outer adult leaf blades and young leaves of hydroponic lettuce. Fresh weight, firmness and color of butterhead lettuce at this stage were still acceptable.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Food Science and Technology
Institute of Tropical Agriculture
DOI Number: https://doi.org/10.1590/1678-4499.0453
Publisher: Instituto Agronomico de Campinas
Keywords: Butterhead lettuce; Harvesting time; Hydroponic; Nitrate content; Organic
Depositing User: Nabilah Mustapa
Date Deposited: 07 Jun 2016 08:18
Last Modified: 07 Jun 2016 08:18
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1590/1678-4499.0453
URI: http://psasir.upm.edu.my/id/eprint/46013
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