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  • 1
    In: Research, Society and Development, Research, Society and Development, Vol. 10, No. 3 ( 2021-03-08), p. e10510313011-
    Kurzfassung: O objetivo desta pesquisa foi determinar os teores de clorofila e vitamina-C nas cultivares da alface (Elba, Cristina e Veneranda) cultivadas em sistema hidropônico com soluções nutritivas apresentando diferentes níveis de salinidade. O experimento foi conduzido na Universidade Estadual da Paraíba,UEPB Campus-II, zona rural da cidade de Lagoa Seca-PB, via técnica Fluxo Laminar de Nutrientes-NFT em ambiente protegido. O delineamento experimental foi em blocos casualizados, em esquema de parcelas subdivididas, as parcelas constituídas por sete soluções nutritivas preparadas a partir da metodologia de Furlani de modo que a solução S1 apresentou Condutividade Elétrica-CE (1,9 dS m-1) e as demais soluções os seguintes valores de CE: S2-2,4; S3-2,9; S4-3,4; S5-3,9; S6-4,4 e S7-4,9 dS m-1, com três repetições. As subparcelas foram compostas pelas cultivares Elba, Cristina e Veneranda. As variáveis analisadas foram: teores de clorofila (Chl a e b) total, carotenoides e vitamina-C. As soluções nutritivas apresentaram comportamento linear para todos os tratamentos não deferindo estaticamente entre si. O maior valor para clorofila total foi obtido na cultivar Veneranda. Para as variáveis (Chl b e total) os maiores teores encontrados foi na cultivar Veneranda, cujos valores foram de 35,97 e 52,06 mg/g-1 respectivamente. O tratamento Elba/S3=3,4 dS m-1 proporcionou o maior teor de carotenoides média de 57 mg/g-1, ainda a cultivar Elba apresentou os maiores teores (Chl a) com as soluções nutritivas S2=2,4 e S3=3,9 dS m-1. A cultivar Veneranda promoveu os maiores teores para (Chl b e total). Os maiores teores de vitamina-C foram encontrados nas cultivares Cristina e Veneranda.
    Materialart: Online-Ressource
    ISSN: 2525-3409
    Sprache: Unbekannt
    Verlag: Research, Society and Development
    Publikationsdatum: 2021
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Online-Ressource
    Online-Ressource
    Canadian Center of Science and Education ; 2018
    In:  Journal of Agricultural Science Vol. 10, No. 7 ( 2018-06-08), p. 317-
    In: Journal of Agricultural Science, Canadian Center of Science and Education, Vol. 10, No. 7 ( 2018-06-08), p. 317-
    Kurzfassung: The use of treated effluents is not a new practice in agriculture, however, the optimization of wastewater was given with mineral fertilizers to grow lettuce in a hydroponic system, subject that is still barely studied. The objective of this study was to evaluate the mineral composition of three lettuce cultivars (Verônica, Vanda and Thais) in a hydroponic system using wastewater, well water and optimized nutrient solutions. The plants was grown in seven nutrient solutions, as S1 = Furlani solution; S2 = domestic wastewater; S3 = optimized domestic wastewater; S4 = well water; S5 = optimized well water; S6 = wastewater UASB and S7 = optimized UASB wastewater and the sub-plot for three lettuce cultivars. It was verified that the treatments S2, S4 and S6 when compared with the respective optimized solutions S3, S5 and S7 presented lower levels of nitrogen, potassium, calcium, zinc, copper and manganese in the two experiments. Same behavior was not observed for phosphorus and sodium. As for the cultivars, they presented, regardless of the experiment, mineral composition similar to each other when the same nutrient solution was used.
    Materialart: Online-Ressource
    ISSN: 1916-9760 , 1916-9752
    Sprache: Unbekannt
    Verlag: Canadian Center of Science and Education
    Publikationsdatum: 2018
    ZDB Id: 2501913-2
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    In: Australian Journal of Crop Science, Southern Cross Publishing, , No. 15(01):2021 ( 2021-1-2), p. 73-81
    Kurzfassung: The objective of this research was to evaluate the different salinity levels on growth and production of three cultivars (Elba, Cristina and Veneranda) of curly lettuce in a hydroponic system using the Nutrient film technique (NFT). The design was randomized blocks in a split plot scheme, in which treatments constituted of nutrition solutions: S1 = Furlani (1.9 dS m-1) and six solutions prepared from Furlani solution in order to present the electrical conductivities of (S2 = 2.4; S3 = 2.9; S4 = 3.4; S5 = 3.9; S6 = 4.4 and S7 = 4.9 dS m-1) with three repetitions. The electrical conductivities were obtained by addition of NaCl. The subplots corresponded to the cultivars Elba, Cristina and Veneranda. The following variables were evaluated: Number of leaves per plant (NLP); Total production (TP); Commercial production (CP); Stem diameter (SD); Fresh leaf mass (FLM), Dry leaf mass (DLM) and Dry stem mass (DSM). Nutritional solutions (S1 and S2) promoted the best results for all variables studied. The highest number of sheets (NS) were found in cultivars Elba and Veneranda when the solutions were used (S1 and S2). The highest yields for (TP) (PC) and (FLM) were found in the cultivar Veneranda with nutrient solutions (S1 and S2). The highest value for dry leaf mass (DLM) and dry stem mass (DSM) was found in the cultivar Veneranda
    Materialart: Online-Ressource
    ISSN: 1835-2693 , 1835-2707
    URL: Issue
    Sprache: Unbekannt
    Verlag: Southern Cross Publishing
    Publikationsdatum: 2021
    ZDB Id: 2413553-7
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    In: Research, Society and Development, Research, Society and Development, Vol. 10, No. 14 ( 2021-11-13), p. e515101420437-
    Kurzfassung: A pesquisa teve como objetivo a avaliar a produção das três cultivares da alface crespa (Elba, Cristina e Veneranda) cultivadas em sistema hidropônico-NFT utilizando soluções nutritivas salinizadas com cloreto de sódio. O experimento foi conduzido em ambiente protegido, no Centro de Ciências Agrárias e Ambientais-CCAA da Universidade Estadual da Paraíba-UEPB Campus-II, localizado na zona rural do município de Lagoa Seca-PB, com coordenadas geográficas: (7 ° 10 ′ 15 ″ S, 35 ° 51 ′ 14 ″ W). O delineamento foi em blocos casualizados, em esquema de parcelas subdivididas, sendo as parcelas constituídas por soluções nutritivas com diferentes valores de condutividade elétrica (S2-2,4; S3-2,9; S4-3,4; S5-3,9; S6-4,4 e S7-4,9 dS m-1) e as subparcelas por diferentes cultivares de alface crespa (Elba, Cristina e Veneranda), com três repetições. As variáveis analisadas foram: Número de folhas por planta-NFP; Produção Total-PT; Produção Comercial-PC; Diâmetro do Caule-DC; Massa Fresca da Folha-MFF, Massa Seca da Folha-MSF e Massa Seca do Caule-MSC. Independentemente da variável analisada, não houve interação significativa entre as soluções nutritivas e as cultivares. Em relação ao efeito isolado da solução, o maior número de folhas por planta, produção total e comercial e massa fresca de folhas foi obtido com o uso da solução S1. Quanto às cultivares, Veneranda apresentou a maior produção comercial, massa fresca e seca da folha e seca do caule, esta cultivar também apresentou a maior média, mas sem diferir da Elba, quando avaliados o número de folhas e a produção total.
    Materialart: Online-Ressource
    ISSN: 2525-3409
    Sprache: Unbekannt
    Verlag: Research, Society and Development
    Publikationsdatum: 2021
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Online-Ressource
    Online-Ressource
    Canadian Center of Science and Education ; 2018
    In:  Journal of Agricultural Science Vol. 10, No. 7 ( 2018-06-08), p. 342-
    In: Journal of Agricultural Science, Canadian Center of Science and Education, Vol. 10, No. 7 ( 2018-06-08), p. 342-
    Kurzfassung: The hydroponic cultivation Lactuca sativa L. can offer producers greater economic profitability, fast financial return due to sanitary and nutritional quality. The objective of this study was to analyze the economic feasibility and profitability indicators of three cultivars of curly lettuce in a hydroponic system using different effluents and well water. The experiment was conducted in a protected environment of the State University of Paraíba-UEPB, Campus-II, in the municipality of Lagoa Seca-Paraíba. Experimental design was in a randomized blocks with plots subdivided in a 7 × 3 factorial scheme, with three replications whose factors were 7 hydroponic solutions and three lettuce cultivars. Variables analyzed included gross revenue; gross margin effective and total operating cost; gross margin total cost of production; leveling point effective operating Cost, total production; operating profit and profitability index. The cultivars: Verônica, Vanda and Thais presented the highest gross revenue and profitability index when irrigated with the Furlani solution (S1).
    Materialart: Online-Ressource
    ISSN: 1916-9760 , 1916-9752
    Sprache: Unbekannt
    Verlag: Canadian Center of Science and Education
    Publikationsdatum: 2018
    ZDB Id: 2501913-2
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    In: Australian Journal of Crop Science, Southern Cross Publishing, , No. 13(06) 2019 ( 2019-6-20), p. 934-943
    Kurzfassung: The objective of this work was to determine the levels of vitamin C, nitrate and chlorophyll in three lettuce cultivars in a hydroponic system using waste- and well-water. The experiment was conducted in a hydroponic system using laminar flow technique and nutrients in a protected environment. The experimental design was randomized blocks with treatments set up in split-plots with three replications, whose main plots devoted to lettuce cultivars and sub-plots to hydroponic solutions. The experimental solutions consisted of 7 nutrients (S): S1=Furlani solution, S2=domestic wastewater, S3=optimized domestic wastewater, S4 =well water S5 =optimized well water; S6 = reactor wastewater solution and S7 =optimized reactor wastewater solution and the subplot for the three cultivars of iceberg lettuce (Verônica, Vanda, and Thais). The following variables were determined: nitrate, vitamin C and chlorophyll content using the method described by Lichtenthaler. The results indicated that highest content of vitamin C was found in the Vanda cultivar using the S1 solution. For Veronica cultivar, the highest levels of vitamin C were observed at solutions S1, S2, S3, S4, and S7. The solutions S2 and S3 did not differ from one another in all three cultivars. For the Vanda cultivar, solutions S1, S4 and S7 were the ones that promoted the highest levels of nitrate, 4.61; 3, 32 and 2.64 g kg-1, respectively. Evaluating the effect of the solution within the cultivars, we verified that the highest nitrate values obtained from S2 nutrition for cultivars Thais and Verônica. Regarding the S5 solution, the Verônica cultivar presented the highest concentration of this nutrient. The cultivate Thaís, the highest contents of chlorophyll b were found in solutions S7, S6, S4, S3 and S2, where they did not differ significantly. Regarding to Vanda cultivar the highest values of chlorophyll b were present in solutions S2 and S5. The Verônica cultivar independent of the solution used presented the same values of this pigment.
    Materialart: Online-Ressource
    ISSN: 1835-2693 , 1835-2707
    URL: Issue
    Sprache: Unbekannt
    Verlag: Southern Cross Publishing
    Publikationsdatum: 2019
    ZDB Id: 2413553-7
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Online-Ressource
    Online-Ressource
    Grupo Verde de Agroecologia e Abelhas ; 2016
    In:  Revista Verde de Agroecologia e Desenvolvimento Sustentável Vol. 11, No. 4 ( 2016-12-01), p. 19-
    In: Revista Verde de Agroecologia e Desenvolvimento Sustentável, Grupo Verde de Agroecologia e Abelhas, Vol. 11, No. 4 ( 2016-12-01), p. 19-
    Kurzfassung: 〈 p 〉 O reúso de efluentes tratados não é uma prática nova, no entanto, há um interesse crescente em relação à necessidade de sua reutilização. Objetivou-se avaliar a caraterização das águas residuárias domestica e do reator UASB e água salobra de poço para o cultivo hidropônico de alface crespa. O experimento foi conduzido em ambiente protegido com sistema hidropônico. Delineamento experimental foi em blocos casualizados com esquema fatorial 7 x 3, três repetições sendo, 7 soluções hidropônicase três cultivares de alface. A parcela experimental, S 〈 sub 〉 1 〈 /sub 〉 =solução de Furlani; S 〈 sub 〉 2 〈 /sub 〉 =água residuária domestica; S 〈 sub 〉 3 〈 /sub 〉 =água residuária domestica otimizada; S 〈 sub 〉 4 〈 /sub 〉 =água de poço; S 〈 sub 〉 5 〈 /sub 〉 =água de poço otimizada; S 〈 sub 〉 6 〈 /sub 〉 =água residuária (UASB) e S 〈 sub 〉 7 〈 /sub 〉 =água residuária (UASB) otimizada, subparcela três cultivares de alface. O pH das águas residuárias foram de 7,7 e 7,4 (Poço); 7,4 e 8,0 (Esgoto bruto) e, 7,2 e 8,2 (Extrabes). A (CE) foram 0,957 e 1,002 (Poço); 2,133 e 2,368 (Esgoto bruto) e (Extrabes) 2,502 e 2,4 09 dS m 〈 sup 〉 -1 〈 /sup 〉 . O uso de soluções minerais nutritivas utilizando água residuária é viável quando utilizado em sistemas hidropônicos, sendo indicado para principalmente para região do semiárido brasileiro e quando se faz uso de água de irrigação de qualidade inferior na produção de hortaliças. 〈 /p 〉 〈 p class="Default" align="center" 〉 〈 strong 〉 〈 em 〉 Quality of wastewater and brackish water used in the hydroponic cultivation of three varieties of curly lettuce 〈 /em 〉 〈 /strong 〉 〈 /p 〉 〈 p align="center" 〉 〈 strong 〉 〈 em 〉   〈 /em 〉 〈 /strong 〉 〈 /p 〉 〈 p 〉 〈 strong 〉 Abstract 〈 /strong 〉 〈 strong 〉 : 〈 /strong 〉 The reuse of treated wastewater is not a new practice, however, there is a growing interest in the need for re-use. The objective was to evaluate the Characterisation of domestic wastewater and UASB and brackish well for hydroponic lettuce. The experiment was conducted in a protected environment with hydroponically. Experimental design was a randomized block with factorial 7 x 3, three replications and 7 hydroponic solutions and three lettuce cultivars. The experimental portion, S1 = Furlani solution; S2 = domestic wastewater; S3 = domestica optimized wastewater; S4 = well water; S5 = optimized well water; S6 = wastewater (UASB) and S7 = wastewater (UASB) optimized subplot three lettuce cultivars. The pH of wastewater were 7.7 and 7.4 (well); 7.4 and 8.0 (raw sewage) and 7.2 and 8.2 (Extrabes). The (EC) were 0.957 and 1.002 (Wells); 2,133 and 2,368 (raw sewage) and (Extrabes) 2,502 09 and 2.4 dS m 〈 sup 〉 -1 〈 /sup 〉 . The use of nutritional mineral solutions using wastewater is feasible when used in hydroponic systems, is indicated for mainly for the Brazilian semi-arid region and when it makes use of water of poor quality irrigation in vegetable production. 〈 /p 〉
    Materialart: Online-Ressource
    ISSN: 1981-8203
    Sprache: Unbekannt
    Verlag: Grupo Verde de Agroecologia e Abelhas
    Publikationsdatum: 2016
    ZDB Id: 2406280-7
    Standort Signatur Einschränkungen Verfügbarkeit
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