Nutrient Management in Recirculating Hydroponic Culture

Bugbee, Bruce

doi:10.17660/actahortic.2004.648.12

Cited by 134 publications

(151 citation statements)

References 13 publications

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“…As plantas podem suportar perfeitamente pH entre 4,5 e 7,5, sem grandes efeitos fisiológicos (Bugbee 1995, Epstein & Bloom 2004, no entanto, em uma cultura hidropônica, é recomendado pH entre 5,5 e 5,8, para permitir a máxima disponibilidade de nutrientes em geral (Bugbee 1995).…”

Section: Methodsunclassified

Cinética de absorção de nitrogênio e acúmulo de frações solúveis nitrogenadas e açúcares em girassol

Rocha

Ferreira

Tavares

et al. 2014

Pesqui. Agropecu. Trop.

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O girassol (Helianthus annuus L.) tem se destacado como cultura promissora, dentre as oleaginosas com importância agroenergética. Considerando-se os nutrientes exigidos pela cultura do girassol, o nitrogênio é o que mais limita a produção, além de afetar seu rendimento de óleo. Este trabalho objetivou avaliar aspectos do metabolismo e a cinética de absorção de nitrogênio (nítrico e amoniacal) na variedade de girassol BRS 324, cultivada em diferentes concentrações desse nutriente, em solução nutritiva, sob condições controladas, em câmara de crescimento. As plantas receberam 0,2 mmol L-1 e 2,0 mmol L-1 de N-NH4+ ou N-NO3-, em delineamento experimental inteiramente casualizado. Foram avaliados os parâmetros cinéticos de absorção (Km e Vmax), massa fresca, acúmulo de frações solúveis nitrogenadas e açúcares. Plantas cultivadas em 2,0 mmol L-1 de N-NH+ apresentaram maior Vmax, indicando maior capacidade de transporte desse íon. O caule apresentou acúmulo preferencial de NO3- e açúcares solúveis, atuando como principal local de reserva energética da planta. Os tratamentos com NH4+ resultaram em correlações negativas entre a massa fresca e a quantidade desse composto no tecido vegetal, o que pode ser responsável por sintomas de toxidez, resultando em redução na relação raiz/ parte aérea.

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Section: Methodsunclassified

Cinética de absorção de nitrogênio e acúmulo de frações solúveis nitrogenadas e açúcares em girassol

Rocha

Ferreira

Tavares

et al. 2014

Pesqui. Agropecu. Trop.

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“…However, one of the weakest points in hydroponics is the lack of information on managing the nutrient solution [1]. The basic laboratory techniques of nutrient solution culture were developed (independently) by Sachs and Knap in Germany about 1860 [2].…”

Section: Introductionmentioning

confidence: 99%

Growth and development of komatsuna (<i>Brassica rapa</i>L. Nothovar) in NFT (nutrient film technique) system, as influenced by natural mineral

Azad¹,

Ishikawa²,

Dı́az-Pérez³

et al. 2013

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The cultivation of komatsuna (Brassica rapa L. Nothovar) was carried out hydroponically using a nutrient film technique (NFT) system inside a greenhouse, applying a quartz porphyry (QP) treated nutrient solution. Quartz porphyry is a natural mineral containing many substances that easily ionize with water to improve water quality. Different growth attributes of komatsuna such as leaf length, leaf width and plant fresh weight increased in plants that received QP treated nutrient solution. The coefficient of variation was smaller for QP treated nutrient solution plants when compared to the control. High light intensity, long duration of solar radiation and higher temperatures in the summer (JulyAug.) promoted plant growth compare to winter (Dec.-Feb.). In contrast, plants grown in the winter accumulated more fresh weight compare to plants grown in the summer. Results also showed that the rapid exchange of ion in the nutrient solution due to the QP treatment enabled the solution to maintain the ion balance, and thus plants grew uniformly and vigorously. The cations Na + and Ca 2+ and the anions Cl − and were dominant and made the media saline. There was a decrease of Na + ion concentration in the recirculating nutrient solution (NFT) due to ion exchange by QP. Results suggest that water treatment with QP could be used for production of high quality vegetables.

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“…The liquid hydroponic culture usually adopts nutrient film technique (NFT) (Figure 1), and DeepWater Culture (DWC)/floating rafts system ( Figure 2) [7]. The growth medium hydroponic systems adopt various inert materials such as, pea gravel, perlite, peat moss, peat, sawdust, rock wool, coconut fiber, grow stones, oasis cubes, vermiculite, coarse sand and expanded clay pellets ( Figure 3) [32].…”

Section: Hydroponicsmentioning

confidence: 99%

Food Sovereignty for Food Security, Aquaponics System as a Potential Method: A Review

Mchunu¹,

Lagerwall²,

Senzanje³

2017

J Aquac Res Development

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Nutrient Management in Recirculating Hydroponic Culture

Cited by 134 publications

References 13 publications

Cinética de absorção de nitrogênio e acúmulo de frações solúveis nitrogenadas e açúcares em girassol

Cinética de absorção de nitrogênio e acúmulo de frações solúveis nitrogenadas e açúcares em girassol

Growth and development of komatsuna (<i>Brassica rapa</i>L. Nothovar) in NFT (nutrient film technique) system, as influenced by natural mineral

Food Sovereignty for Food Security, Aquaponics System as a Potential Method: A Review

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Nutrient Management in Recirculating Hydroponic Culture

Cited by 134 publications

References 13 publications

Cinética de absorção de nitrogênio e acúmulo de frações solúveis nitrogenadas e açúcares em girassol

Cinética de absorção de nitrogênio e acúmulo de frações solúveis nitrogenadas e açúcares em girassol

Growth and development of komatsuna (&lt;i&gt;Brassica rapa&lt;/i&gt;L. Nothovar) in NFT (nutrient film technique) system, as influenced by natural mineral

Food Sovereignty for Food Security, Aquaponics System as a Potential Method: A Review

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Growth and development of komatsuna (<i>Brassica rapa</i>L. Nothovar) in NFT (nutrient film technique) system, as influenced by natural mineral