Gas exchanges and production of watermelon plant under salinity management and nitrogen fertilization

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dc.creatorSaulo Soares da Silva
dc.creatorGeovani Soares de Lima
dc.creatorVera Lúcia Antunes de Lima
dc.creatorHans Raj Gheyi
dc.creatorLauriane Almeida dos Anjos Soares
dc.creatorRômulo Carantino Moreira Lucena
dc.date2019
dc.date.accessioned2026-07-07T04:30:48Z
dc.descriptionIn the Brazilian semi-arid region, the occurrence of water with high salt concentrations is common, making it a limiting factor for the agricultural production. The water-use salinity management strategies are an alternative capable of minimizing the deleterious effects of the stress on plants. This study aimed to evaluate the gas exchanges and production of ‘Sugar Baby’ watermelon plants under strategies of irrigation with saline water and nitrogen fertilization. The experiment was conducted in a randomized block design, arranged in a 6 x 2 factorial scheme, with five replicates, corresponding to six irrigation strategies with saline water applied at different phenological stages of the crop (control - irrigation with low- salinity water throughout the entire crop cycle, and salt stress at the vegetative stage, vegetative/flowering stage, flowering, fruiting and fruit maturation) and two nitrogen rates (50 % and 100 %, equivalent to 50 mg and 100 mg of N kg-1 of soil). Two levels of water salinity were studied: one with a low and the other with a high level of electrical conductivity (0.8 dS m-1 and 3.2 dS m-1, respectively). The salinity of 3.2 dS m-1 in the vegetative/flowering and fruit maturation phases decreases the stomatal opening, transpiration and CO. assimilation rate. The level with 50 % of N provides a higher assimilation rate of CO. and fresh fruit mass. The watermelon plant expresses a greater sensitivity to saline stress in the vegetative and flowering phases, a situation that results in a decreased fruit size.
dc.formatapplication/pdf
dc.identifier1517-6398
dc.identifierhttps://www.redalyc.org/articulo.oa?id=253067965022
dc.identifierhttps://www.redalyc.org/journal/2530/253067965022/
dc.identifierhttps://www.redalyc.org/journal/2530/253067965022/html/
dc.identifierhttps://www.redalyc.org/journal/2530/253067965022/253067965022.epub
dc.identifierhttps://www.redalyc.org/journal/2530/253067965022/movil
dc.identifierhttps://doi.org/10.1590/1983-40632019v4954822
dc.identifier.urihttp://hdl.handle.net/123456789/463648
dc.languageen
dc.publisherUniversidade Federal de Goiás
dc.relationhttp://www.redalyc.org/revista.oa?id=2530
dc.rightsPesquisa Agropecuária Tropical
dc.sourcePesquisa Agropecuária Tropical (Brasil) Vol.49
dc.subjectAgrociencias
dc.titleGas exchanges and production of watermelon plant under salinity management and nitrogen fertilization
dc.typeartículo científico

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Pesquisa Agropecuária Tropical - Universidade Federal de Goiás