Produção de alface em NFT e Floating aproveitando água salobra e o rejeito da dessalinização

Santos, Alexandre Nascimento dos; Silva, Ênio Farias de França e; Soares, Tales Miler; Dantas, Raquele Mendes Lira; Silva, Manassés Mesquita da

doi:10.1590/s1806-66902011000200009

Cited by 19 publications

(20 citation statements)

References 16 publications

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“…Studying the performance of lettuce cultivars subjected to different salinity levels of the irrigation water, Oliveira et al (2011) observed that growth parameters decreased linearly with the increase in salinity, which was also found by Soares et al (2010), Santos et al (2011) and Alves et al (2011).…”

Section: Introductionmentioning

confidence: 78%

Lettuce growth and water consumption in NFT hydroponic system using brackish water

Soares

Silva

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe qualitative aspects of water, such as the preparation or replenishment of the nutrient solution, are critical to the success of hydroponic crops. Therefore, the aim of this study was to evaluate the behavior of "Americana" lettuce (cv. Tainá) under increasing levels of saline stress (0.2 -control, 1.2, 2.2, 3.2, 4.2 and 5.2 dS m -1 ), replenishing the evapotranspiration with brackish water in Experiment I and supply water (0.2 dS m -1 ) in Experiment II, both used in the preparation of the nutrient solution. In both experiments, the treatments were arranged in a randomized block design, with six treatments and four replicates. Shoot fresh matter, shoot dry matter and leaf area in Experiment I suffered reductions of 15.22, 12.67 and 15.6% per unit increase of EC, respectively. In Experiment II, reductions of 8.01, 6.90 and 8.14% were observed for the same variables, respectively. In Experiments I and II, linear decrease in water consumption due to the increase in salinity was observed, with reductions of 8.83 and 5.63% for each unit increase of electrical conductivity of water when the evapotranspiration was replenished using brackish and supply water, respectively.Crescimento e consumo hídrico de alface americana cultivada com águas salobras em sistema hidropônico R E S U M O Os aspectos qualitativos da água quanto ao preparo ou reposição da solução nutritiva são fundamentais para o sucesso de cultivos hidropônicos. Portanto, o objetivo do presente trabalho foi avaliar o comportamento da alface americana (cv. Tainá) sob níveis crescentes de estresse salino (0,2 -testemunha, 1,2, 2,2, 3,2, 4,2 e 5,2 dS m -1 ) com reposição da lâmina evapotranspirada usando a água salobra utilizada no preparo da solução no Experimento I ou com água de abastecimento (0,2 dS m -1 ) no Experimento II. Em ambos os experimentos os tratamentos foram distribuídos em um delineamento experimental em blocos ao acaso com seis tratamentos e com quatro repetições. As massas fresca e seca da parte aérea e a área foliar no Experimento I sofreram reduções de 15,22, 12,67 e 15,6%, por incremento unitário da condutividade elétrica, respectivamente. No Experimento II foram constatadas reduções de 8,01, 6,90 e 8,14%, para as massas fresca e seca da parte aérea e área foliar, respectivamente. Verificou-se, nos Experimentos I e II, diminuição linear do consumo hídrico em função do aumento da salinidade, com reduções percentuais de 8,83 e 5,63% por incremento unitário da condutividade elétrica da água utilizada no preparo da solução nutritiva, nas resposição com águas salobra e doce, respectivamente.

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Section: Introductionmentioning

confidence: 78%

Lettuce growth and water consumption in NFT hydroponic system using brackish water

Soares

Silva

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…In Brazil, this vegetable has great economic and social importance, because its production has a relatively low cost, besides a high demand for labor, allowing small properties to cultivate it, thus generating jobs and income (Alves et al, 2011;Dias et al, 2011;Lúcio et al, 2011;Santos et al, 2011;Paulus et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Initial Development and Tolerance of Lettuce (Lactuca sativa) Cultivars Irrigated with Saline Water

Sá¹,

Souto²,

Paiva³

et al. 2017

JAS

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“…A few promising results have been achieved for the rational use of brackish water in the Nutrient Film Technique (NFT) hydroponic system (Santos et al, 2010(Santos et al, , 2011Soares et al, 2010Soares et al, , 2015Alves et al, 2011;Paulus et al, 2012;Bione et al, 2014;Lira et al, 2015), which can open a new perspective for hydroponics as an economic alternative, provided that brackish water is available. In Brazil, the main focus of these studies is the semiarid region, where brackish water is relatively frequent in the underground reserves, for constituting one of the main causes of abandonment of the various wells drilled with public or private resources (Santos et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…In this context, systems such as Floating and Deep Film Technique (DFT) are promising for the rural communities of the semiarid region, where interruptions in water supply are frequent. In these systems, plant roots remain submerged in the nutrient solution (Zanella et al, 2008;Santos et al, 2011); therefore, they will only suffer with the effects of recirculation if it is so prolonged that the solution level is reduced. Due to this advantage, such systems assume less frequent recirculations compared with NFT, in which irrigation is usually performed in intervals of 15 min.…”

Section: Introductionmentioning

confidence: 99%

Frequency of recirculation of nutrient solution in hydroponic cultivation of coriander with brackish water

Silva

Soares

Gheyi

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe present study used a hydroponic system with leveled channels, in order to evaluate coriander cultivation under different intervals of nutrient solution recirculation and the use of freshwater and brackish water. The experiment was carried out in a randomized block design with five replicates, in a 2 x 4 factorial scheme, from February to March 2014. Two levels of electrical conductivity (EC) of water (0.32 and 4.91 dS m -1 ) and four frequencies of nutrient solution recirculation (at intervals of 0.25, 2, 4 and 8 h) were evaluated. This experimental design was adopted in the evaluations performed at 10, 15 and 25 days after transplantation (DAT). Additionally, at 21 DAT subplots were established for the evaluation of plant position (initial, intermediate and final) along the hydroponic channels. It is viable to use nutrient solution recirculation every 8 h, without production losses. The use of brackish water (EC = 4.91 dS m -1 ) may be an alternative for the hydroponic cultivation of coriander, despite the reduction in production, but without any damage on the visual aspect of the product. Plants grown at the initial and intermediate positions along the hydroponic channels showed higher production.Frequências de recirculação de solução nutritiva no cultivo hidropônico de coentro com água salobra R E S U M O Neste trabalho foi utilizado um sistema hidropônico com os canais de cultivo em nível com o objetivo de avaliar a cultura do coentro submetida a diferentes intervalos para recirculação da solução nutritiva em interação com o uso de água doce e salobra. O experimento foi conduzido em blocos casualizados com cinco repetições, em esquema fatorial 2 x 4, entre fevereiro e março de 2014. Avaliaram-se dois níveis de condutividade elétrica (CE) da água: 0,32 e 4,91 dS m -1 , além de quatro frequências de recirculação da solução nutritiva (intervalos de 0,25; 2; 4 e 8 h). Este delineamento experimental foi aplicado nas avaliações realizadas aos 10, 15 e 25 dias após o transplantio (DAT). Adicionalmente, aos 21 DAT foram estabelecidas subparcelas visando avaliar o efeito da posição das plantas (inicial, intermediária e final) nos perfis hidropônicos. É viável adotar-se recirculação da solução nutritiva a cada 8 h sem perdas de produção. O uso da água salobra (CE = 4,91 dS m -1 ) pode ser uma alternativa para o cultivo do coentro hidropônico, mesmo com reduções na produção, porém sem efeitos depreciativos à qualidade visual do produto. As plantas cultivadas nas posições inicial e intermediária dos perfis hidropônicos apresentaram maior produção.

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Produção de alface em NFT e Floating aproveitando água salobra e o rejeito da dessalinização

Cited by 19 publications

References 16 publications

Lettuce growth and water consumption in NFT hydroponic system using brackish water

Lettuce growth and water consumption in NFT hydroponic system using brackish water

Initial Development and Tolerance of Lettuce (Lactuca sativa) Cultivars Irrigated with Saline Water

Frequency of recirculation of nutrient solution in hydroponic cultivation of coriander with brackish water

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