Efficiency of water use in sunflower grown in hydroponic system under saline stress

Júnior, José Amilton Santos; Gheyi, Hans Raj; Filho, Doroteu Honório Guedes; Soares, Frederico Antônio Loureiro; Dias, Nildo da Silva

doi:10.1590/s0100-69162013000400011

Cited by 17 publications

(17 citation statements)

References 19 publications

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“…In general, these results evidence that water consumption did not increase in the same proportion of plant density, as also observed by Santos Júnior et al (2013) for sunflower. The variation in the amount of seeds did not influence significantly (p > 0.05) E-SFP, but TFP, SFP and SDP, as well as E-SDP, showed significant results (p < 0.05) and fitted to a linear regression model.…”

Section: Resultssupporting

confidence: 85%

“…A low-cost hydroponic system (Santos Júnior, 2013) was used, which consisted of a 6 x 1.40 m wooden support waterproofed with oil paint, projected with supporting capacity for 12 PVC tubes, leveled, with 6 m of length and 100 mm of diameter.…”

Section: Methodsmentioning

confidence: 99%

“…Nevertheless, new adjustments have been made in hydroponic systems in order to adapt this technology to the peculiar conditions of the Brazilian semiarid region, such as the low-cost hydroponic system (Santos Júnior, 2013). Thus, it is necessary to study some ways of rationalizing costs and water use in these hydroponic systems, such as the spacing between cells and the amount of seeds to be used, because these factors directly influence the amount of water used in the enterprise and the produced mass, as well as the necessary costs and even its implantation viability.…”

Section: Introductionmentioning

confidence: 99%

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Water use efficiency of coriander produced in a low-cost hydroponic system

Júnior

Gheyi

Cavalcante

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe increase of water use efficiency in crop production is a clear need in areas with restricted access to this resource and, in these cases, the adoption of forms of cultivation contextualized to local conditions are essential. Thus, the implications of the variation in the amount of seeds per cell (0.5, 1.0, 1.5 and 2.0 g) and spacing between cells (7.0, 10.0 and 15.0 cm) on variables related to consumption and water use efficiency for the production of coriander (cv. Tabocas) in a low-cost hydroponic system, an alternative for semiarid regions, were evaluated. A completely randomized experimental design, analysed in 4 x 3 factorial scheme with three replicates, was adopted, and the data were subjected to analysis of variance at 0.05 probability level. It was found that the reduction in the spacing between cells has a better cost-benefit ratio with respect to water consumption, biomass produced and cost of seeds. Therefore, it is recommended the adoption of a spacing of 7.0 cm between cells and the use of 1.0 g seeds per cell; this configuration promoted efficiency of 81.59 g L -1 in shoot green mass production and total mass of 62.4 g coriander bunches.Eficiência do uso da água na produção do coentro em hidroponia de baixo custo R E S U M O O incremento da eficiência do uso da água na produção das culturas é uma necessidade evidente em regiões com acesso restrito a este recurso e, nesses casos, a adoção de formas de cultivo contextualizadas à realidade local é imprescindível. Neste contexto, avaliou-se as implicações da variação da quantidade de sementes por célula (0,5; 1,0; 1,5 e 2,0 g) e do espaçamento entre células (7,0; 10,0 e 15,0 cm) sobre variáveis relacionadas ao consumo e eficiência do uso da água na produção de molhos de coentro (cv. Tabocas) em um "módulo hidropônico de baixo custo", alternativo para regiões semiáridas. Adotou-se um delineamento experimental inteiramente casualizado analisado em esquema fatorial 4 x 3, com três repetições cujos dados foram submetidos à análise de variância em nível de 0,05 de probabilidade. Verificou-se que a redução dos espaços entre células proporcionou melhor relação custo benefício em relação ao consumo de água, massa produzida e custo de sementes. Recomenda-se, portanto, a adoção de 7,0 cm de espaçamento entre células e a utilização de 1,0 g de sementes célula -1 ; esta configuração proporcionou eficiência de 81,59 g L -1 na produção de massa verde da parte aérea e molhos de 62,4 g de massa total.

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Section: Resultssupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Water use efficiency of coriander produced in a low-cost hydroponic system

Júnior

Gheyi

Cavalcante

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…WUE reduction of 50% was found with the EC w of 9.85 (1011-IPA), 9.00 (2502-IPA), 6.92 (2564-IPA), 7.50 (2600-IPA), 10.25 (Ponta Negra), and 8.86 (Qualimax) dS m -1 (Figure 3). These reductions indicate problems in water use by the plants for producing biomass with increasing salinity, and different effects for the production and water consumption of the plants, since the plants consumed more and produced less (Santos Júnior et al, 2013). The reductions in grain yield found for the sorghum varieties is one of the main effects of salinity on plants; similar effects are found for other species of agronomic interest, such as peanut (Correia et al, 2009), melon (Medeiros et al, 2008), and cucumber (Medeiros et al, 2009).…”

Section: Resultsmentioning

confidence: 99%

Biometrics and grain yield of sorghum varieties irrigated with salt water

Guimarães

Simões

Oliveira

et al. 2019

Rev. bras. eng. agríc. ambient.

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The objective of this study was to identify sorghum varieties that have growth and grain yield potential under saline conditions. The study was conducted in 2016 at a greenhouse of the Embrapa Semiárido, in Petrolina, state of Pernambuco, Brazil (9° 8’ 8.9’’ S, 40° 18’ 33.6’’ W, and altitude of 373 m). A randomized block experimental design, with a 6 × 5 factorial arrangement, and three replications was used. The treatments consisted of six grain sorghum varieties (1011-IPA, 2502-IPA, 2564-IPA, 2600-IPA, Ponta Negra, and Qualimax), and five salinity levels of the irrigation water (ECw = 0, 1.5, 3.0, 6.0, and 12.0 dS m-1). Plant height, stem diameter, dry matter yield, width and length of the +3 leaf, total leaf area, water use efficiency, and grain yield were evaluated. The sorghum varieties 2502-IPA and 1011-IPA presented the highest grain yields when using an ECw of 6.0 dS m-1, followed by Ponta Negra, Qualimax, and 2600-IPA. The 2564-IPA, 2600-IPA, and Qualimax varieties were more sensitive to the salinity effects, with reductions of 50% of the production with ECw of 3.52, 2.75, and 4.38 dS m-1, respectively.

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“…The nutrient and water absorptions is more efficient in hydroponics and allows the use of saline waters for irrigation (SANTOS JÚNIOR, 2013).…”

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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Efficiency of water use in sunflower grown in hydroponic system under saline stress

Cited by 17 publications

References 19 publications

Water use efficiency of coriander produced in a low-cost hydroponic system

Water use efficiency of coriander produced in a low-cost hydroponic system

Biometrics and grain yield of sorghum varieties irrigated with salt water

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

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