Analytical Methods Used in Soilless Cultivation

Blok, C.; Kreij, C. de; Baas, R.; Wever, G.

doi:10.1016/b978-044452975-6.50009-5

Cited by 23 publications

(32 citation statements)

References 45 publications

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“…The styrofoamfibersdensityis also smallerthan that of theorganicgrowing mediasuch ascoconut huskwhich has a density of 0.07g/cm 3 [1]. This indicates that the styrofoam fibers has sufficient amount ofoxygenandwater;they are greater than thoseinrockwoolandcoconut fibers.The best density for agrowing mediumis about 3-20times smallerthan the normalsoildensityofabout1.5g/cm 3 [14].Therefore, the density of styrofoam fibers should be increased twice to be at least the same as the density of rockwool. This means that the total porosity should be decreased by changing the affecting parameters.…”

Section: Figure 2(a) Styrofoam Fibers and (B) Its Imageobtained Usimentioning

confidence: 99%

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Rotary forcespun styrofoam fibers as a soilless growing medium

Fauzi¹,

Edikresnha²,

Munir³

et al. 2016

AIP Conference Proceedings

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The influence of nickel slag aggregate concentration to compressive and flexural strength on fly ash-based geopolymer composite AIP Conference Proceedings 1725, 020083 (2016) Abstract.To make styrofoam fibers from used styrofoam, rotary forcespinning technique was used because it offers high production rate and affordable production cost. The used styrofoam was dissolved in acetone to obtain styrofoam solution as a precursor of syrofoam fibers. Since the technique utilizes centrifugal force, the precursor was thrown out and its phase changed to be solid following acetone solvent evaporation. Long, clean and light styrofoam fibers were then produced. To determine if the styrofoam fibers is a good soilless growing medium, physico-chemical properties including pH and electrical conductivity, bulk density, water retention and wettability were measured. Rockwool, which is the most popular soilless growing medium and easily obtained from local farm suppliers, was selected as a benchmark to evaluate the styrofoam fibers.

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Section: Figure 2(a) Styrofoam Fibers and (B) Its Imageobtained Usimentioning

confidence: 99%

“…Water retention, the water retention of the growing medium was obtained using suction forcemethod [14]. First, the styrofoam fibers wasweighted using a weight balance and it wasthen put into a sample place.…”

Section: Physico-chemicalcharacterizations Of Styrofoam Fibersmentioning

confidence: 99%

Rotary forcespun styrofoam fibers as a soilless growing medium

Fauzi¹,

Edikresnha²,

Munir³

et al. 2016

AIP Conference Proceedings

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“…The negative and neutral effects of biochar application have resulted in increased attention on methods to characterize biochars in general and for specific applications [32][33][34]. A wide variety of growing media are already being used in horticulture and a set of specific quality parameters and measuring methods has been developed [35]. Evaluating biochar for horticultural applications requires both, a material characterization with rooting media tests and a quantified link with results in field or container experiments.…”

Section: Introductionmentioning

confidence: 99%

Biochar for Horticultural Rooting Media Improvement: Evaluation of Biochar from Gasification and Slow Pyrolysis

Blok¹,

Salm²,

Hofland-Zijlstra³

et al. 2017

Agronomy

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Abstract:Peat is used as rooting medium in greenhouse horticulture. Biochar is a sustainable alternative for the use of peat, which will reduce peat derived carbon dioxide emissions. Biochar in potting soil mixtures allegedly increases water storage, nutrient supply, microbial life and disease suppression but this depends on feedstock and the production process. The aim of this paper is to find combinations of feedstock and production circumstances which will deliver biochars with value for the horticultural end user. Low-temperature (600 • C-750 • C) gasification was used for combined energy and biochar generation. Biochars produced were screened in laboratory tests and selected biochars were used in plant experiments. Tests included dry bulk density, total pore space, specific surface area, phytotoxicity, pH, EC, moisture characteristics and microbial stability. We conclude that biochars from nutrient-rich feedstocks are too saline and too alkaline to be applied in horticultural rooting media. Biochars from less nutrient-rich feedstocks can be conveniently neutralized by mixing with acid peat. The influence of production parameters on specific surface area, pH, total pore space and toxicity is discussed. Biochar mildly improved the survival of beneficial micro-organisms in a mix with peat. Overall, wood biochar can replace at least 20% v/v of peat in potting soils without affecting plant growth.

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“…En este sentido, varios autores han señalado los efectos deletéreos de los materiales con alto contenido en compuestos de naturaleza lipídica sobre el compostaje de los mismos, que pueden afectar a la capacidad de retención de agua y la difusión de oxígeno en éstos, y llegar incluso a manifestarse en fenómenos de aglomeración y compactación (Cayuela et al, 2010;Ruggieri et al, 2008). Asimismo, este efecto de asociación de partículas en agregados de mayor tamaño es también común en materiales que contienen partículas orgánicas muy finas, manifestándose además con mayor intensidad durante el secado de las muestras (Blok et al, 2008). De este modo, la alta concentración de lípidos encontrada en A y A+H (ver la sección 4.1.2.2) facilita la aglomeración de las partículas de pequeño tamaño que, al humedecerse, retienen gran cantidad de agua en los poros existentes entre ellas y, por tanto, los resultados registrados en el análisis granulométrico no son de utilidad para interpretar las relaciones aire:agua de los dos composts objeto de estudio.…”

Section: Recuento De Grupos Microbianosunclassified

“…La resistencia a la mojabilidad de este último podría atribuirse a una película de aire fuertemente adsorbida, o bien a la deposición de compuestos orgánicos hidrofóbicos, tales como humatos de hierro (Blok et al, 2008;Bunt, 1988).…”

Section: Recuento De Grupos Microbianosunclassified

Caracterización y uso de compost de alperujo como enmienda orgánica. Evaluación agronómica y medioambiental

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Analytical Methods Used in Soilless Cultivation

Cited by 23 publications

References 45 publications

Rotary forcespun styrofoam fibers as a soilless growing medium

Rotary forcespun styrofoam fibers as a soilless growing medium

Biochar for Horticultural Rooting Media Improvement: Evaluation of Biochar from Gasification and Slow Pyrolysis

Caracterización y uso de compost de alperujo como enmienda orgánica. Evaluación agronómica y medioambiental

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