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| Registros recuperados: 10 | |
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| Geisenhoff,Luciano O.; Jordan,Rodrigo A.; Santos,Rodrigo C.; Oliveira,Fabricio C. de; Gomes,Eder P.. |
| ABSTRACT The integration of fish farming in intensive system and plant production, called "aquaponics" is practiced successfully in countries like the USA, Australia and Europe. In Brazil, this integration has attracted the attention of researchers and producers. In this context, the aim of this study was to evaluate the effect of two substrates (crushed stone number 3, CS III and flexible polyurethane foam, FPF) on the production of aquaponic lettuce, moreover, to show that the residual water from intensive tilapia production provides sufficient qualitative characteristics for competitive production of lettuce without adding commercial fertilizers. The treatment in which FPF was used provided higher concentrations of macro and micronutrients in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soilless cultivation; Water recirculation and aquaponics system. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000200291 |
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| Lima,Tiago JL; Gazaffi,Rodrigo; Ceccherini,Guilherme J; Marchi,Luana; Martinez,Marcela; Ferreira,Camila G; Sala,Fernando C. |
| ABSTRACT 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Seedlings; Tray; Soilless cultivation; Hidroponic. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300408 |
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| Jordan,Rodrigo A.; Ribeiro,Evaldo F.; Oliveira,Fabricio C. de; Geisenhoff,Luciano O.; Martins,Elton A. S.. |
| ABSTRACT This study had as objective to evaluate the effect of the substrate on the yield of lettuce grown in aquaponic and hydroponic systems. The study was conducted at the Federal University of Grande Dourados, located in Dourados, MS. A randomized complete block design was used, with three treatments and 16 replicates. The cultivation systems were analyzed independently. The substrates analyzed were: coconut shell fiber, phenolic foam and expanded vermiculite. The plants were grown in two systems (aquaponic and hydroponic), using the NFT (Nutrient Film Technique) system. The crop used was lettuce cv. ‘Alcione’. The parameters analyzed were: crop yield and percentage of roots per plant. In addition, macronutrient contents were analyzed in the leaves.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Soilless cultivation; Coconut shell fiber; Tilapia. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800525 |
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| Silva,Mairton G. da; Oliveira,Itamar de S.; Soares,Tales M.; Gheyi,Hans R.; Santana,Geocassia de O.; Pinho,Jozelmo de S.. |
| ABSTRACT An experiment was carried out in an adapted DFT (deep film technique) hydroponic system in PVC pipes to evaluate the growth, production and water consumption of coriander cv. ‘Verdão’, during June-July 2014. The experiment was carried out in a randomized block design with five replicates, in a 2 x 4 factorial scheme, totaling 40 plots. Two intervals of nutrient solution recirculation (0.25 and 2 h) and four levels of water electrical conductivity (ECw 0.26, 2.47, 4.91 and 7.0 dS m-1) were evaluated. At 25 days after transplanting (DAT), the reductions in plant height and in the shoot fresh and dry matter of the bunch were 2.95, 6.08 and 3.32% per unit increase of ECw (in dS m-1). Despite the reductions in growth and production, saline stress did... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coriandrum sativum L.; Soilless cultivation; Nutrient solution recirculation; Salinity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800547 |
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| Jordan,Rodrigo A.; Geisenhoff,Luciano O.; Oliveira,Fabricio C. de; Santos,Rodrigo C.; Martins,Elton A. S.. |
| ABSTRACT In the aquaponic system, the characteristics of the materials used as substrate directly affect plant development, because besides acting as a support base, they must present a surface to fix microorganisms, responsible for the conversion of nutrients into forms more easily available to plants. Thus, the objective of this study was to evaluate the effect of four growing substrates on the yield of lettuce grown in aquaponic system. The experimental design was randomized blocks with four treatments, which corresponded to the substrates, and six replicates. Plants were grown using the nutrient film technique (NFT) system. The substrates used in the experiment were: coconut shell fiber with crushed stone #3, expanded vermiculite, zeolite and phenolic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biofilter; Biodigestion; Soilless cultivation; Intensive fish farming. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000100027 |
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| Martins,Juliana B.; Santos Júnior,José A.; Bartusch,Victor P.; Gheyi,Hans R.; Bezerra Neto,Egídio; Silva,Manassés M. da. |
| ABSTRACT The analysis of plant response to the cationic variability of the waters, in addition to the osmotic component, is indispensable in the context of salt stress. Thus, between October 2017 and February 2018, in Recife, PE, Brazil (8° 1’ 7” S and 34° 56’ 53” W, and altitude of 6.5 m), the present study was carried out to evaluate the water relations of parsley plants (Petroselinum crispum), cv. Graúda Portuguesa, cultivated in brackish nutrient solutions (electrical conductivities of 1.7, 2.7, 3.7, 4.7, 5.7 and 6.7 dS m-1) prepared in waters with different cationic natures (NaCl, CaCl2, KCl and MgCl2). The experimental design was completely randomized, in a 6 x 4 factorial scheme, with five repetitions, and five plants per plot. Two experiments were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Petroselinum crispum; Soilless cultivation; Water content. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000900662 |
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| Cova,Alide M. W.; Freitas,Fabio T. O. de; Viana,Paula C.; Rafael,Maria R. S.; Azevedo Neto,André D. de; Soares,Tales M.. |
| ABSTRACT The objective of this study was to evaluate the growth and accumulation of ions in lettuce grown in different hydroponic systems and recirculation frequencies. The experimental design was randomized blocks with 8 treatments and 4 replicates. The evaluated hydroponic systems were Nutrient Flow Technique (NFT) and an adapted Deep Flow Technique (DFT), the latter with recirculation frequencies of 0.25, 2 and 4 h. Both systems used fresh water and brackish water. Plant growth, accumulation of inorganic solutes (Na+, K+, Cl- and NO3-) and the correlation between dry matter production and Na+/K+ and Cl-/NO3- were evaluated. The salinity of the water used to prepare the nutrient solution caused decrease in growth and K+ and NO3- levels, and increased... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soilless cultivation; Lactuca sativa; Salinity; NFT and DFT systems. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300150 |
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| Silva Júnior,Fernando J. da; Santos Júnior,José A.; Silva,Manassés M. da; Silva,Ênio F. de F. e; Souza,Edivan R. de. |
| ABSTRACT Hydroponic cultivation using saline waters is an alternative for agricultural production, especially in the cultivation of vegetables. Therefore, the present work was conducted with the objective of evaluating the water consumption, water use efficiency and water content, as well as dry matter partitioning of chives (Allium schoenoprasum), cv. Todo Ano Evergreen – Nebuka exposed to six levels of nutrient solution salinity (1.5, 3.0, 4.5, 6.0, 7.5 and 9.0 dS m-1), applied at two circulation frequencies (twice a day at 8 and 16 h; and three times a day - at 8, 12 and 16 h). The level in the nutrient solution reservoir, which decreased according to the water consumption by plants, was replaced with the respective saline water (Experiment I) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium schoenoprasum; Cultivation of vegetables; Soilless cultivation. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500359 |
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| Da Silva Dias,Nildo; Dantas de Morais,Patricia Lígia; Abrantes Sarmento,José Darcio; Nogueira de Sousa Neto,Osvaldo; Palácio,Vilauba Sobreiro; de Freitas,Jair José Rabelo. |
| Abstract In Mossoró-RN, which is part of the semi-arid region of Brazil, a large part of the country’s melon production is concentrated, whose great potential is currently limited by water quality due to salt concentration. Therefore, the objective of this work was to investigate the use of saline nutritive solutions in the irrigation of greenhouse melon (Cucumis melo L. cv. Néctar) culture in coconut fiber. The experiment was carried out using a randomized block design with a 5 x 2 factorial arrangement, with four replications, where the treatments consisted of nutritive solutions with five salinity levels (1.25 - control, 1.43, 1.86; 2.96 and 4.86 dS m-1) and for two different times to evaluate fruit quality parameters (at harvest and after 12 days of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertigation; Post-harvest; Soilless cultivation; Storage; Substrate. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000400517 |
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| Steidle Neto, Antonio José; Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, Minas Gerais; Zolnier, Sérgio; Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, Minas Gerais; Marouelli, Waldir Aparecido; Centro Nacional de Pesquisa de Hortaliças, Empresa Brasileira de Pesquisa Agropecuária, Brasília, Distrito Federal. |
| O objetivo deste trabalho foi avaliar a influência da transpiração do tomateiro na fração lixiviada e na condutividade elétrica (CE) da solução nutritiva percolada no substrato de areia, em cultivo realizado sob condições de casa-de-vegetação. Foram utilizadas duas técnicas de fertirrigação, sendo uma denominada de sistema de controle convencional e outra, de sistema de controle computadorizado. No sistema de controle convencional, a solução nutritiva foi aplicada em intervalos de tempo fixos entre eventos de fertirrigação. No outro sistema, a aplicação ocorreu de acordo com estimativas de transpiração que foram realizadas pelo algoritmo de controle do sistema computadorizado. Em dias nublados, a CE da solução nutritiva drenada diminuiu em ambos os... |
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Palavras-chave: 5.03.02.00-0 Lycopersicon esculentum; Hidroponia; Cultivo sem solo; Fertirrigação; Casa-de-vegetação Engenharia de Água e Solo Lycopersicon esculentum; Hydroponics; Soilless cultivation; Fertigation; Greenhouse. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3246 |
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| Registros recuperados: 10 | |
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