Desempenho de cultivares de alface em cultivo hidropônico sob dois níveis de condutividade elétrica

Magalhães, Adriana Guedes; Menezes, Dimas; Resende, Luciane Vilela; Neto, Egídio Bezerra

doi:10.1590/s0102-05362010000300013

Cited by 14 publications

(15 citation statements)

References 6 publications

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“…These results corroborate those found by other researchers, who observed varied responses of different lettuce cultivars subjected to salinity (Magalhães et al, 2010;Paulus et al, 2010;Oliveira et al, 2011).…”

Section: Resultssupporting

confidence: 93%

Use of fish-farming wastewater in lettuce cultivation

Guimarães

Oliveira

Torres

et al. 2016

Rev. bras. eng. agríc. ambient.

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Lettuce stands out as the main leafy vegetable consumed in Brazil, with divergence regarding adaptability to different environmental conditions, which include salinity. The objective of the work was to evaluate the response of lettuce cultivars to the use of saline wastewater from fish farming. The experiment was conducted in a completely randomized design with four replicates, in a factorial 7 x 4, corresponding to seven cultivars (Regiane, Vera, Isabela, Elisa, Amelia, Lavinia and Angelina) and four salt concentrations (1.2, 2.2, 3.2 and 4.2 dS m-1). The evaluated characteristics were: number of leaves, leaf area, crown diameter and shoot fresh and dry matter. Diluted wastewater from fish farming can be used in the preparation of solution for fertigation of lettuce. The cultivars Regiane and Elisa had higher production of leaves and leaf area, while Amélia and Angelina were the most productive in terms of biomass. The cultivars Vera, Isabela, Amélia and Angelina were more tolerant to the salinity of the fertigation solution.

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Section: Resultssupporting

confidence: 93%

Use of fish-farming wastewater in lettuce cultivation

Guimarães

Oliveira

Torres

et al. 2016

Rev. bras. eng. agríc. ambient.

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“…The number of leaves obtained in the present study is lower than the mean of 32 leaves reported by Magalhães et al (2010), and this difference can be explained by the higher electrical conductivity (EC) of the nutrient solution used by these authors (2.5 dS m -1 ). Comparing mineral and modified solutions, i.e., BM with BO, FM with FO and so on, the mineral solutions led to higher means of number of leaves, which can be associated with the lower availability of nutrients to the plants with the use of the modified solutions, due to the capacity of adsorption of ions by organic compounds from the biofertilizers used in the production of these solutions, because, regardless of the plot, the EC was maintained close to 1.5 dS m -1 .…”

Section: Resultscontrasting

confidence: 85%

“…Various studies have already been conducted with the cultivation of this vegetable using the technique of hydroponics, such as Magalhães et al (2010), Paulus et al (2012) and Sarmento et al (2014). However, all refer to the use of mineral nutrient solutions, particularly the solution of Furlani (1995).…”

Section: Introductionmentioning

confidence: 99%

Growth of hydroponic lettuce with optimized mineral and organomineral nutrient solutions

Filho

Azevedo

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of this study was to evaluate the growth of crisp lettuce in hydroponic cultivation, following the nutrient film technique (NFT), using optimized mineral and organomineral nutrient solutions. The experiment was set in 8 x 3 factorial scheme, with treatments distributed in randomized blocks and split plots, with three replicates. The plots corresponded to eight nutrient solutions, of which four were mineral solutions with chemical composition suggested by Bernardes, Furlani, Castellane & Araújo and Ueda, and four were organomineral solutions, suggested by this research with chemical composition similar to those of the previously mentioned mineral solutions. The subplots corresponded to three varieties of crisp lettuce: Thaís, Vanda and Verônica. At 25 days after transplanting, the following parameters were evaluated: stem and crown diameter, root length, leaf area and number of leaves. For stem and crown diameters and number of leaves, the mineral solutions promoted the highest means. The mineral solution of Furlani and the organomineral solutions, except the modified solution of Castellane & Araújo, promoted the greatest root lengths. The smallest leaf area was obtained in the organomineral solution of Ueda. The cultivar Verônica had the highest root length and stem diameter.Crescimento da alface hidropônica cultivada com soluções nutritivas minerais e organominerais otimizadas R E S U M O Objetivou-se, neste trabalho, avaliar o crescimento da alface crespa em cultivo hidropônico, seguindo a técnica do fluxo laminar de nutrientes (NFT), utilizando soluções nutritivas minerais e organominerais otimizadas. Instalou-se um experimento em blocos casualizados com o uso de parcelas subdivididas, com três repetições. As parcelas corresponderam a oito soluções nutritivas, sendo quatro minerais com composição química sugeridas por Bernardes, Furlani, Castellane & Araújo e Ueda e quatro organominerais, sugeridas nesta pesquisa com composição química semelhante às soluções minerais, anteriormente citadas. As subparcelas corresponderam a três cultivares da alface crespa (Thaís, Vanda e Verônica). Aos 25 dias após o transplantio das mudas avaliaram-se as variáveis diâmetro do caule e da coroa, comprimento da raiz, área foliar e número de folhas. Para os diâmetros da coroa e do caule e número de folhas, as soluções minerais promoveram as maiores médias. A solução mineral de Furlani e as soluções organominerais, exceto a de Castellane & Araújo modificada, promoveram os maiores comprimentos de raízes; a menor área foliar foi obtida pela solução organomineral de Ueda. A cultivar Verônica apresentou os maiores comprimento de raiz e diâmetro caulinar.

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“…In the first harvest, we noticed 61.9% more leaves in plants produced from the greater (50 cm³ cell -1 ) to the lower volume (10 cm³ cell -1 ) and 62.8% in the second harvest, showing similar plant growth in the two harvests ( Figure 1B). Growing several lettuce cultivars under NFT system using seedlings produced in phenolic foam trays (8 cm³ cell -1 ) were found 27 leaves plant -1 for all the studied varieties at 30 DAT (Magalhães et al, 2010). Using the same cell volume and harvest season at 39 DAT for Grand Rapids type lettuce, the authors observed 26.4 leaves plant -1 (Casaroli et al, 2003).…”

Section: Resultsmentioning

confidence: 95%

Volume of cells on trays influences hydroponic lettuce production

et al. 2018

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Lettuce seedlings used on hydroponic cultivation (NFT) are usually produced in trays with small volume, requiring two transplants: from tray to nursery and then to the definitive place. The aim of this study was to verify lettuce performance under NFT system, using seedlings produced in trays with several cell volumes (50, 40, 35, 31, 30, 29, 27, 20 and 10 cm³ cell-1). The tray volumes are considered treatments. The experimental design was completely randomized blocks, with four replicates. Seedlings were transplanted directly to the definitive profile, except those ones produced in 10 cm³ cell-1. Two harvests were performed, at 22 and 29 days after transplant (DAT). We evaluated number of senescent leaves, total number of leaves, shoot fresh mass, root fresh mass, shoot dry mass, stem length and productivity. The best performance was obtained using seedlings produced in trays with higher volume per cell. The nursery phase was not necessary and it was possible to obtain reduction from two to one transplant, corresponding to trays of 20 to 50 cm³ cell-1. Seedlings produced in trays with 40 and 50 cm³ cell-1 made the early harvest possible, at 22 DAT of cultivation under hydroponic NFT system.

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Desempenho de cultivares de alface em cultivo hidropônico sob dois níveis de condutividade elétrica

Cited by 14 publications

References 6 publications

Use of fish-farming wastewater in lettuce cultivation

Use of fish-farming wastewater in lettuce cultivation

Growth of hydroponic lettuce with optimized mineral and organomineral nutrient solutions

Volume of cells on trays influences hydroponic lettuce production

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