Resposta de cultivares de alface à salinidade da solução nutritiva com rejeito salino em hidroponia

Dias, Nildo da Silva; Neto, Osvaldo Nogueira de Sousa; Cosme, Christiano Rebouças; Jales, Antonio G. de O; Rebouças, J. R. L.; Oliveira, Ana Railka de Souza

doi:10.1590/s1415-43662011001000001

Cited by 14 publications

(23 citation statements)

References 9 publications

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“…Other authors have also observed reduction in leaf area of lettuce as a function of the increase in the salinity of the nutrient solution (Dias et al, 2011;Moraes et al, 2014). Studies on other crops have also shown adverse effects of saline stress on leaf area as a function of increase in saline levels; for instance, Dias et al (2010) in muskmelon (Cucumis melo) and Souza et al (2010) in physic nut (Jatropha curcas L.).…”

Section: Resultsmentioning

confidence: 90%

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: Resultsmentioning

confidence: 90%

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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“…Studies in the literature confirm that the use of brackish water is related to the crop tolerance to salt stress (SOARES et al, 2007;PAULUS et al, 2010;DIAS et al, 2011a;DIAS et al, 2011b;OLIVEIRA et al, 2011), and most of them were performed with lettuce crops (Lactuca sativa L.), which stands out in Brazil as the most produced vegetable in the hydroponic system Nutrient Film Technique (NFT) (PAULUS et al, 2012).…”

Section: Introdutionmentioning

confidence: 99%

Mineral Nutrition of Crisphead Lettuce Grown in a Hydroponic System With Brackish Water

Soares

Silva

et al. 2016

Rev. Caatinga

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-Water availability in the Brazilian semiarid is restricted and often the only water source available has high salt concentrations. Hydroponics allows using these waters for production of various crops, including vegetables, however, the water salinity can cause nutritional disorders. Thus, two experiments were conducted in a greenhouse at the Department of Agricultural Engineering of the Federal Rural University of Pernambuco, to evaluate the effects of salinity on the mineral nutrition of crisphead lettuce, cultivar Taina, in a hydroponic system (Nutrient Film Technique), using brackish water in the nutrient solution, which was prepared by adding NaCl to the local water (0.2 dS m -1 ). A randomized blocks experimental design was used in both experiments. The treatments consisted of water of different salinity levels (0.2, 1.2, 2.2, 3.2, 4.2 and 5.2 dS m -1 ) with four replications, totaling 24 plots for each experiment. The water added to compensate for the waterdepth loss due to evapotranspiration (WCET) was the brackish water of each treatment in Experiment I and the local water without modifications in Experiment II. The increase in the salinity of the water used for the nutrient solution preparation reduced the foliar phosphorus and potassium contents and increased the chloride and sodium contents, regardless of the WCET. Foliar nitrogen, calcium, magnesium and sulfur contents were not affected by increasing the water salinity used for the nutrient solution preparation.Keywords: Lactuca sativa L. Salinity. Horticulture. NUTRIÇÃO MINERAL DE ALFACE AMERICANA EM CULTIVO HIDROPÔNICO COM ÁGUAS SALOBRASResumo -No semiárido brasileiro a disponibilidade hídrica é restrita e muitas vezes a única fonte de água disponível possui altas concentrações de sais. A hidroponia permite o uso dessas águas para a produção de diversas culturas, dentre elas as hortaliças, entretanto, a salinidade pode ocasionar distúrbios nutricionais. Diante disso, foram conduzidos dois experimentos em ambiente protegido no Departamento de Engenharia Agrícola da Universidade Federal Rural de Pernambuco, objetivando-se avaliar os efeitos da salinidade sobre a nutrição mineral da alface americana cv. Tainá em sistema hidropônico Nutrient Film Technique (NFT), utilizando águas salobras no preparo da solução nutritiva, sendo essas águas obtidas pela adição de NaCl a água de abastecimento local (0,2 dS m -1 ), e a reposição da lâmina evapotranspirada realizada usando a respectiva água salobra utilizada no preparo da solução no Experimento I e, com água de abastecimento local no Experimento II. Para ambos os experimentos o delineamento experimental utilizado foi o de blocos ao acaso com seis tratamentos (0,2; 1,2; 2,2; 3,2; 4,2 e 5,2 dS m -1 ), e quatro repetições, totalizando 24 parcelas experimentais para cada experimento. O aumento da salinidade da água utilizada no preparo da solução nutritiva, independente da estratégia de reposição da lâmina evapotranspirada, proporcionou redução nos teores foliares de fósforo e potássio e aumento nos ...

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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%

“…Thus, the producers are forced to utilize irrigation as a way to overcome this problem Santos et al, 2011;Sarmento et al, 2014). However, the lower quality of the water available for agricultural use in this region leads to large problems in the economic potential of lettuce cultivation, due to the presence of high contents of salts in the irrigation water (Alves et al, 2011;Dias et al, 2011;Oliveira et al, 2011;Santos et al, 2011;Sarmento et al, 2014).…”

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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Resposta de cultivares de alface à salinidade da solução nutritiva com rejeito salino em hidroponia

Cited by 14 publications

References 9 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

Mineral Nutrition of Crisphead Lettuce Grown in a Hydroponic System With Brackish Water

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

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