Hydroponics

Jensen, Merle H.

doi:10.21273/hortsci.32.6.1018

Cited by 78 publications

(37 citation statements)

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“…Research studies reported that commercial production of greenhouse vegetables with soilless media adopted to reduce economic losses caused by soil-borne pathogens [51][52][53]. While other researchers reported that soilless culture can provide more efficient use of water and fertilizers [54,55], reduce root diseases [56], and facilitate cultivation of crops in areas where normal cultivation is not possible [57]. Thus, soil has been replacing by many organic and inorganic substrates, since they are disease and pest free inert material capable of holding required sufficient moisture and can be reused year after year.…”

Section: Introductionmentioning

confidence: 99%

Influence of Soilless Culture Substrate on Improvement of Yield and Produce Quality of Horticultural Crops

Asaduzzaman¹,

Saifullah²,

Mollick³

et al. 2015

Soilless Culture - Use of Substrates for the Production of Quality Horticultural Crops

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Section: Introductionmentioning

confidence: 99%

Influence of Soilless Culture Substrate on Improvement of Yield and Produce Quality of Horticultural Crops

Asaduzzaman¹,

Saifullah²,

Mollick³

et al. 2015

Soilless Culture - Use of Substrates for the Production of Quality Horticultural Crops

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“…It has been demonstrated that the same yields can be obtained in closed systems 29 (where surplus solution is recovered, replenished, and recycled) as compared to 30 open systems (once the nutrient solution is delivered to the plant roots, it is not 31 reused) (Jensen, 1997), as long as good hygienic and environmental conditions are 32 maintained (Gertsson et al, 1994). The use of recycled irrigation freshwater can 33 effectively reduce water usage and mitigate nutrient runoff from nursery production 34 sites.…”

Section: Introduction 24mentioning

confidence: 99%

Bacterial community composition of recycled irrigation water of a NFT-type experimental system, with and without a slow sand filter

Cafà

Thwaites²,

Dickinson

2018

Preprint

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The bacterial community composition (BCC) of recycled irrigation freshwater was monitored on a Nutrient Film Technique (NFT)-type experimental hydroponic system. Two identical NFT systems in a greenhouse were used to grow tomato plants. One was connected to a slow sand filter (SSF), and one was used as control. DNA was isolated from irrigation freshwater, and molecular methods were carried out to characterise the BCC. These included terminal-restriction fragment length polymorphism (T-RFLP), cloning and 454 pyrosequencing. A total number of 291 442 trimmed sequences, of 211 bp average length. A strong differentiation of the bacterial community composition in recycled irrigation water was triggered by the activity of the SSF. Phylogenetic affiliation revealed that Bacilli, Alpha- and Gammaproteobacteria, and Nitrospira were differentially abundant during filtration with the SSF. This study showed that SSF modified the relative amount of a set of bacterial genera. These included Pseudomonas, Bacillus, Flavobacterium, Burkholderia and Azospirillum. These bacteria have been previously described as plant growth promoting rhizobacteria (PGPR). The presence, increased or exclusive, in Water ssf of bacteria such as Bacteroidetes, Gemmatimonadetes, Nitrospira, Firmicutes, Alpha-, Beta-, Gamma- and Deltaproteobacteria, was associated with an increased biomass in plants. Such findings are promising for future applications of a combined system NFT-SSF: NFT guarantees a controlled closed environment for the growth of plants, while the SSF secures the microbiological balance of recycled irrigation water.

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“…La técnica de cultivo sin suelo es usada comercialmente para la producción de plantas ornamentales de alto valor (CALATAYUD et al, 2008). La misma, respecto a la de cultivo en suelo, ofrece varias ventajas al productor, como ser el control más estricto de la cantidad de agua y fertilizantes aplicados (JENSEN, 1997), reducción de problemas sanitarios (RIVIERE y CARON, 2001), y un aumento de la productividad de 3 a 10 veces, junto con un menor impacto ambiental debido a un menor uso de agroquímicos como el bromuro de metilo (CANTLIFFE y VANSICKLE, 2001). El uso de sustratos, en dicha técnica, requiere un adecuado balance entre aireación y disponibilidad de agua para lograr un desarrollo normal del cultivo (FAKHRI et al, 1995).…”

Section: Introductionunclassified

Tamaño de contenedor y tipo de sustrato afectan la eficiencia en el uso del agua en Gerbera jamesonii para flor cortada

Mascarini¹,

Lorenzo²,

Svartz³

et al. 2012

RBHO

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Tamaño de contenedor y tipo de sustrato afectan la eficiencia en el uso del agua en Gerbera jamesonii para flor cortada (¹) LIBERTAD MASCARINI (2) ; GABRIEL LORENZO (2) ; HECTOR SVARTZ (2) ; SABRINA PESENTI (2) ; SILVIA AMADO (2) (1) Recebido em 04/02/2010 e aceito para publicação em 09/08/2011.(2) Facultad de Agronomía -Universidad de Buenos Aires. Avenida San Martín 4453 (1417) Ciudad Autónoma de Buenos Aires, Argentina RESUMENSe probaron dos tamaños de contenedor (macetas de 4 y 8 L) y tres mezclas de sustrato (% de turba/perlita 0/100, 25/75 y 50/50) con el objetivo de determinar la combinación óptima para el cultivo de gerbera para flor cortada, considerando la productividad comercial (cantidad y calidad de flores) y el impacto ambiental (eficiencia en el uso del agua y fertilizantes). La mejor combinación en el primer año de producción fue macetas de 8 L con sustrato 0/100, seguido de los contenedores de 4 y 8 L con 25/75, con un rendimiento de 53.4 , 30.5 y 29.7 flores./m-2 respectivamente. El resto de los tratamientos tuvo un rendimiento similar de alrededor de 20 flores m-2. La calidad comercial de las flores cortadas fue aceptable en todos los tratamientos. En cuanto a la eficiencia medida como agua consumida por flor cosechada, el tratamiento 8 L 0/100 resultó claramente superior con un valor de 1.23 L/flor, el resto de los tratamientos estuvieron entre 2.17 y 4.14 L/flor, guardando relación tanto con el tamaño de contenedor como con el tipo de sustrato utilizado. La importancia de estos resultados es la consideración simultánea de los factores que hacen a la rentabilidad comercial y al desarrollo de tecnologías sustentables para los cultivos intensivos. Palabras-chave: agricultura sustentable, cultivo sin suelo, perlita, turba. ABSTRACT Container size and growing media affects water use efficiency in a Gerbera jamesonii cut flower cropTwo containers (4 and 8 L plastic pots) and three growing media mixture types (0/100, 25/75 and 50/50 % of peat/perlite) were used, with the aim of determining the optimum combination for gerbera cut flower crop, considering both commercial productivity (yield and quality of cut flowers) and environmental impact, (water and fertilizer use efficiency). The best combination in the first year of production was 8 L and 0/100, followed of 4 and 8 L with the 25/75, with a yield of 53.4, 30.5 and 29.7 flowers m-2 respectively. The yield of the rest of the treatments were similar, around 20 flowers m-2. Commercial cut flower quality was aceptable in all treatments. Considering the efficiency measured as the ratio water used per flower harvested, 8L 0/100 was clearly superior with a value of 1.23 L/flower, the rest of the treatments were between 2.17 y 4.14 L/flower, keeping relation as much with container size like with growing media mixture. The importance of these results is the simultaneous consideration of many factors which affect both comercial profitability and development of sustainable technology for intensive crops.

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Hydroponics

Cited by 78 publications

References 0 publications

Influence of Soilless Culture Substrate on Improvement of Yield and Produce Quality of Horticultural Crops

Influence of Soilless Culture Substrate on Improvement of Yield and Produce Quality of Horticultural Crops

Bacterial community composition of recycled irrigation water of a NFT-type experimental system, with and without a slow sand filter

Tamaño de contenedor y tipo de sustrato afectan la eficiencia en el uso del agua en Gerbera jamesonii para flor cortada

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