Desempenho de cultivares de alface crespa em dois ambientes de cultivo em sistema hidropônico

Blat, SF; Sánchez, S O Manuel; Araujo, J. A. C.; Bolonhezi, Denizart

doi:10.1590/s0102-05362011000100024

Cited by 24 publications

(17 citation statements)

References 5 publications

(3 reference statements)

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“…Conversely, rejects from Sapeaçu and Conceição do Coité, and particularly the artificially salinated water, significantly reduced SDM. These results indicate that the electrical conductivity of the nutrient solution and the water quality significantly affect lettuce yield, corroborating Blat et al (2011), Casaroli et al (2003, Domingues et al (2012), Luz et al (2006), and Seo et al (2009).…”

Section: Conceição Do Coité (T6)supporting

confidence: 84%

Production of lettuce with brackish water in NFT hydroponic system

Silva

Paz

Soares

et al. 2018

SCA

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Groundwater reserves in the semi-arid regions, which are mostly brackish, could be used to meet local water demands. Hydroponic cultivation is an alternative of rational use of water. Thus, the objective of this work was to evaluate the technical feasibility of using brackish groundwater in the semi-arid region of Bahia and Recôncavo of Bahia for hydroponic production of curly lettuce cv. 'Verônica' and purple lettuce cv. 'Quatro Estações'. The experiment was conducted in a greenhouse in the city of Cruz das Almas, Bahia State, in a randomized block experimental design, composed of seven treatments [T1-public-supply water; T2-water from the well of UFRB; T3-reject water from the well of Cruz das Almas; T4-water from the well of Sapeaçu; T5-reject water from the well of Sapeaçu; T6-reject water from the well of Conceição do Coité and T7-artificially salinated water (NaCl)] and six replicates in an experimental hydroponic structure using the nutrient film technique (NFT). The following variables were analyzed: number of leaves, shoot fresh matter, shoot length, root length, shoot dry matter, and root dry matter. Relative shoot dry matter production in curly lettuce increased by 1, 5, and 2% in the treatments T2, T3, and T4, respectively, whereas in purple lettuce, the increments were 10, 1, and 20%, respectively, for the same treatments. The use of brackish groundwater from the deep tubular wells of the Federal University of Recôncavo da Bahia and Sapeaçu and desalination reject water from the tubular well of Cruz das Almas proved to be technically feasible for hydroponic lettuce production. Key words: Hydroponics. Lactuca sativa L.. Groundwater. Water salinity. ResumoAs reservas hídricas subterrâneas existentes na região semiárida, na maioria salobras, poderiam ser utilizadas quando disponíveis para atender a demanda hídrica local. O cultivo hidropônico é uma alternativa de exploração racional de água. Com isso, o objetivo do trabalho foi avaliar a viabilidade técnica da utilização de águas subterrâneas salobras do Semiárido e do Recôncavo Baiano na produção hidropônica de alface crespa cv. Verônica e alface lisa repolhuda roxa cv. Quatro Estações. O experimento foi conduzido em casa de vegetação, no Município de Cruz das Almas, Bahia, em delineamento experimental em blocos aleatorizados, composto por sete tratamentos [T1 -água de abastecimento; T2 -água do poço da UFRB; T3 -rejeito do poço do Município de Cruz das Almas; T4 -água do

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Section: Conceição Do Coité (T6)supporting

confidence: 84%

Production of lettuce with brackish water in NFT hydroponic system

Silva

Paz

Soares

et al. 2018

SCA

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“…The inconsistency between the data of this research and above mentioned authors may be attributed to the temperature record during the experiment because, while these authors observed mean values lower than 34 ºC, the temperatures inside the greenhouse in the present study were higher than 36 ºC during 65% of the evaluation period, reachin maximum of 38 ºC. Blat et al (2011), harvested 179.20 g lettuce plant -1…”

Section: Shoot Fresh and Dry Phytomass Productioncontrasting

confidence: 92%

“…However, there was no significant difference between the latter and the cultivar Verônica. Evaluating different cultivars of green-leaf lettuce in hydroponic cultivation, Blat et al (2011) also found superiority of the cultivar Verônica regarding root fresh phytomass (27.2 g plant , respectively. The mineral solutions of Bernardes (T 1 ) and Furlani (T 3 ) favored higher root fresh phytomass.…”

Section: Root Fresh and Dry Phytomass Productionmentioning

confidence: 86%

Production of lettuce genotypes in hydroponic system using different organo-mineral nutrient solutions

Filho¹,

Azevedo²,

Azevedo³

et al. 2018

Aust J Crop Sci

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Mineral solutions are widely used in hydroponic cultivation but little is known about the use of organo-mineral solutions. With this focus, the present study aimed to evaluate the production of three green-leaf lettuce genotypes (Thaís, Vanda and Verônica) in eight nutrient solutions, in NFT hydroponic system, set up in gutters. Four mineral solutions were used in this experiment, referred to as the respective names of the authors (Bernardes, Furlani, Castellane and Araújo, and Ueda). Moreover, four organo-mineral solutions (using biofertilizers in their formulation) were applied, totally eight nutrient solutions. The experiment was carried out in randomized blocks in split plots with three replicates. The main plots consisted of eight nutrient solutions and three lettuce cultivars were assigned in subplots (including six plants per subplot). Lettuce production was evaluated 25 days after transplanting, through the determination of shoot fresh phytomass (SFP), root fresh phytomass (RFP), shoot dry phytomass (SDP) and root dry phytomass (RDP). Production variables were not influenced by the interactive effect of the studied factors. Individually, the nutrient solutions influenced the production parameters and there was variation among the lettuce cultivars only for root fresh phytomass. Higher commercial production of lettuce was obtained with the mineral solutions of Bernardes, Furlani, and Castellane and Araújo.

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“…Shoot fresh and dry weights of lettuce crops grown in regularly irrigated perlite and almond shells, as well as perlite under drought, were consistent with hydroponic lettuce yields reported in the literature, which range from 160 to 268 g plant −1 for fresh weight and 6.4 to 13.3 g plant −1 for dry weight, depending on system type and lettuce variety [121][122][123][124]. This therefore indicates production relevant to commercial standards for lettuce crops grown in these treatments, showing that almond shells could still be used as an environmentally conscious media replacement, even though fresh weight yields were 52% lower than in perlite.…”

Section: Effect Of Growing Media On Yieldssupporting

confidence: 86%

Evaluation of Recycled Materials as Hydroponic Growing Media

et al. 2020

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Conventional soilless growing media, such as perlite, are mined from nonrenewable resources and can only be disposed of in landfills after limited use. There is a need to investigate novel, sustainable growing media adapted from waste or engineered to be reused over multiple cycles. This study investigated waste almond shells and a recycled plastic drainage plank as hydroponic growing media alternatives. Physiochemical properties were evaluated, and a germination and greenhouse growth trial was conducted to understand the effect these media have on production and nutritional quality of lettuce (Lactuca sativa L. cv. Catalogna Verde). Drought testing was carried out to understand how the media affected the lettuce’s response to water stress. In comparison to perlite, yields under regular irrigation were reduced by 52% in almond shells and 72% in plastic planks, although lettuce grown in almond shells still obtained commercially relevant yields. Reduced yields in almond shells were likely caused by the shell’s high salinity. Lettuce growth in plastic planks was limited by impeded root growth and low water-holding capacity. In conclusion, with minor alterations, almond shells could be used as a sustainable growing media alternative to perlite in hydroponic lettuce production. More research is needed to manufacture the planks to be conducive to plant growth.

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Desempenho de cultivares de alface crespa em dois ambientes de cultivo em sistema hidropônico

Cited by 24 publications

References 5 publications

Production of lettuce with brackish water in NFT hydroponic system

Production of lettuce with brackish water in NFT hydroponic system

Production of lettuce genotypes in hydroponic system using different organo-mineral nutrient solutions

Evaluation of Recycled Materials as Hydroponic Growing Media

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