Produção e qualidade de pak choi cultivado em diferentes sistemas hidropônicos e condutividades elétricas

Francisco de Assis de Oliveira; Mário Jonas Veras  Costa; Maria do Carmo de  Oliveira; Mychelle Karla Teixeira de Oliveira; Ronimeire Torres da  Silva; Helena maria de Morais Neta  Góis; Jacques Carvalho  Ribeiro Filho

doi:10.1590/1983-21252024v3712436rc

Authors

Francisco de Assis de Oliveira Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0002-6895-7736
Mário Jonas Veras Costa Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0001-7161-5609
Maria do Carmo de Oliveira Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0003-2164-430X
Mychelle Karla Teixeira de Oliveira Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0003-3264-5172
Ronimeire Torres da Silva Diretoria Regional de Educação e Cultura do RN, Apodi, RN, Brazil https://orcid.org/0000-0002-8362-3056
Helena maria de Morais Neta Góis Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0002-9210-6296
Jacques Carvalho Ribeiro Filho Empresa de Assistência Técnica e Extensão Rural do Estado do Ceará, Crateús, CE, Brazil https://orcid.org/0000-0001-9544-009X

DOI:

https://doi.org/10.1590/1983-21252024v3712436rc

Keywords:

Brassica campestris var. chinensis. Leafy vegetables. Soilless cultivation. Hydroponics. Salt stress.

Abstract

Pak choi is a leafy vegetable rich in important bioactives for human health. As this vegetable is cultivated predominantly in Europe and Asia, there is little information about it in the Brazilian literature. The aim of this study was to evaluate the production and quality of pak choi cultivated in hydroponic systems using nutrient solutions of different electrical conductivities. An experiment was set up following a randomized block design, in a 2 × 5 factorial scheme, with two hydroponic systems (NFT and Semi-hydroponic) and five levels of electrical conductivity (1.0, 2.0, 3.0, 4.0 and 5.0 dS m^-1). The plants were harvested 35 days after transplanting and evaluated for the following variables: plant height, number of leaves, stem diameter, leaf area, shoot fresh and dry mass, leaf succulence, specific leaf area, petiole firmness, juice pH and soluble solids. Growth and quality variables were affected by the interaction between EC levels and hydroponic systems. The semi-hydroponic system promoted the greatest development of pak choi plants and greater tolerance to salinity. Plants cultivated in the NFT system had a lower nutritional requirement to reach maximum growth. Increase in nutrient solution EC did not affect the visual quality of pak choi, but reduced the physicochemical quality of its leaves.

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