Effect of NPK Levels on Growth and Bulb Quality of Some Geophytes in Substrate Culture

Ruamrungsri, Soraya; Bundithya, W.; Potapohn, N.; Ohtake, Norikuni; Sueyoshi, Kuni; Ohyama, Takuji

doi:10.17660/actahortic.2011.886.29

Cited by 11 publications

(7 citation statements)

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“…In contrast, the influence of biochars on soilless substrates used in greenhouse and nursery containers has not been studied adequately, and only a few citations, summarized previously (Altland and Locke, 2012), are tangentially relevant to current container production systems. Nonetheless, the collection of papers thus far seems to indicate the same potential benefits in soilless substrates including additions of some nutrients (Ruamrungsri et al, 2011), reduction in leaching of nitrates and phosphates (Beck et al, 2011), beneficial shifts in microbial populations (Graber et al, 2010), and improved physical properties (Dumroese et al, 2011). Recently, we reported that one form of mixed SDB retained and released nitrate and phosphate such that the concentration in the substrate would be moderated against fluctuations in nutrient concentration from intermittent fertilization events (Altland and Locke, 2012).…”

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Effect of Biochar Type on Macronutrient Retention and Release from Soilless Substrate

Altland

Locke²

2013

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A series of column studies were conducted to determine the influence of three different biochar types on nitrate, phosphate, and potassium retention and leaching in a typical greenhouse soilless substrate. A commercial substrate composed of 85 sphagnum peatmoss : 15 perlite (v:v) was amended with 10% by volume of three different biochar types including: gasified rice hull biochar (GRHB), sawdust biochar (SDB), and a bark and wood biochar (BWB). The non-amended control substrate, along with substrates amended with one of three biochar materials, were each packed into three columns. Columns were drenched with nutrient solution and leached to determine the impact of biochar on nutrient retention and leaching. Nitrate release curves were exponential and peaked lower, at later leaching events, and had higher residual nitrate release over time with each biochar amendment. The impact of biochar amendment on phosphate retention and release was more variable within and across the two experiments. In both experiments, the GRHB was a net source of phosphate, providing more phosphate to the system than the fertilizer application and hence obscuring any retention and release effect it might have. Potassium release varied by amendment type within each experiment, but within each amendment type was relatively consistent across the two experiments. All biochar types were a source of potassium, with GRHB providing more than SDB, but both providing far more potassium than the fertilizer event. The BWB amendment resulted in more leached potassium than the control substrate, but relatively little compared with GRHB and SDB amendments.

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Effect of Biochar Type on Macronutrient Retention and Release from Soilless Substrate

Altland

Locke²

2013

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“…plants in a blend of coconut fiber and tuff and attributed improvements to either stimulated shifts in microbial populations toward beneficial plant growth-promoting rhizobacteria or fungi or low doses of phytotoxic biochar chemicals, which may have stimulated plant growth at low doses. Ruamrungsri et al (2011) reported that gloriosa lily (Gloriosa rothschildiana L.) in a 1:1:1 sand:rice husk charcoal:coconut fiber substrate did not respond to varying levels of applied calcium (Ca) fertilizers as a result of high Ca levels in rice husk charcoal. Santiago and Santiago (1989) briefly summarized their work using wood-based charcoal chips for hydroponic culture in humid tropical regions of Asia but provided few details other than plants grew well when fertilized with resin-coated fertilizers.…”

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Biochar Affects Macronutrient Leaching from a Soilless Substrate

Altland¹,

Locke²

2012

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Byproducts of pyrolysis, known collectively as biochar, are becoming more common and readily available as ventures into alternative energy generation are explored. Little is known about how these materials affect greenhouse container substrates. The objective of this research was to determine the effect of one form of biochar on the nutrient retention and release in a typical commercial greenhouse container substrate. Glass columns filled with 85:15 sphagnum peatmoss:perlite (v:v) and amended with 0%, 1%, 5%, or 10% biochar were drenched with nutrient solution and leached to determine the impact of biochar on nutrient retention and leaching. Nitrate release curves were exponential and peaked lower, at later leaching events, and had higher residual nitrate release over time with increasing biochar amendment rate. This suggests that biochar might be effective in moderating extreme fluctuations of nitrate levels in container substrates over time. Peak phosphate concentration decreased with increasing biochar amendment rate, whereas time of peak release, girth of the peak curve, and final residual phosphate release all increased with increasing biochar amendment. Additional phosphate levels in leachates from biochar-amended substrates, in addition to the higher phosphate concentrations present in later leaching events, suggest this form of biochar as a modest source of phosphate for ornamental plant production. Although there was not sufficient potassium (K) from biochar to adequately replace all fertilizer K in plant production, increasing levels of this form of biochar will add a substantial quantity of K to the substrate and should be accounted for in fertility programs.

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“…Freesia es considerada como una planta ornamental que aún está en proceso de domesticación, y con una dosis de 100N:50P:200K mg L -1 es suficiente para producirla en un sustrato compuesto de arena, cascarilla de arroz y fibra de coco (Ruamrungsri et al, 2011). Con la solución Steiner a 100 % se aplicó más nitrógeno (168 mg L -1 ) y potasio (273 mg L -1 ) pero menos fósforo (31 mg L -1 ) que la recomendada por estos autores.…”

Section: Discussionunclassified

“…Diversos autores han evaluado el crecimiento, desarrollo y calidad de la flor de freesia en función de la nutrición, y han encontrado influencia del nitrógeno en el tamaño de hoja, color de la hoja, número de hojas, longitud del tallo floral, tamaño del cormo, crecimiento vegetativo y el tiempo en aparición del tallo floral. Por su parte, el fósforo causa cambios en el tamaño de la hoja, el tiempo en aparición del tallo floral, tiempo de vida de la espiga floral y el peso del cormo (Thomas et al, 1998;Kidsadawanich y Ruamrungsri, 2005;Ruamrungsri et al, 2011;Khan et al, 2012). En la mayoría de las investigaciones se aplicaron fertilizantes comerciales, tanto en el cultivo en suelo como en mezclas de materiales orgánicos e inorgánicos.…”

Section: Introductionunclassified

“…En la mayoría de las investigaciones se aplicaron fertilizantes comerciales, tanto en el cultivo en suelo como en mezclas de materiales orgánicos e inorgánicos. Kidsadawanich y Ruamrungsri (2005) y Ruamrungsri et al (2011) usaron sustratos y solución nutritiva para cultivar esta especie bajo hidroponía. La hidroponía permite desarrollar plantas en soluciones nutritivas (SN), con o sin el uso de un medio artificial (arena, grava, lana de roca, vermiculita, entre otros) para proveer soporte mecánico a la planta (Lara, 1999).…”

Section: Introductionunclassified

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Crecimiento Y Calidad Del Tallo Floral De Freesia X Hybrida en Hidroponía

et al. 2014

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Freesia (Freesia x hybrida) tiene alto potencial como flor de corte pero es poco comercializada en México; tolera bajas temperaturas, produce amplia diversidad de colores y tiene un aroma agradable. En esta investigación se evaluó el efecto de la concentración de la solución nutritiva de Steiner en el crecimiento y calidad del tallo floral de Freesia x hybrida cv. ‘Patio’ generada a partir de cormos de 2.5 cm de diámetro, crecida bajo hidroponía y sombreada con malla roja a 85 %, durante el invierno en el Valle de México. Los tratamientos fueron la combinación factorial de cuatro concentraciones de solución nutritiva (SN) Steiner (25, 50, 75 y 100 %) y dos fechas de siembra (FS) (22 de septiembre y 18 de octubre de 2010), en un diseño completamente al azar. Al inicio de la floración, con la solución Steiner a 100 % se obtuvieron plantas con menores valores de altura de planta (49 cm), longitud del tallo floral (37 cm), área foliar por planta (170 cm2), lecturas SPAD (62), longitud de la espiga (8.5 cm), número de flores por espiga (8), grosor del tallo (3.6 mm), biomasa seca de tallo, hoja y total, mientras que con la concentración de 25 % se obtuvieron los mayores valores de altura de planta (59.4 cm), lecturas SPAD (71.7), longitud del tallo floral (61 cm), longitud de la espiga (11 cm), número de flores por espiga (12), grosor del tallo (5.0 mm) y de vida de florero (12 d). En el número de hojas por planta y en la biomasa seca de raíz no hubo diferencias entre tratamientos. La eficiencia cuántica máxima del fotosistema II (Fm/Fv) fue igual entre tratamientos (P > 0.05) en ambas fechas de medición, con un promedio de 0.81.

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Effect of NPK Levels on Growth and Bulb Quality of Some Geophytes in Substrate Culture

Cited by 11 publications

References 0 publications

Effect of Biochar Type on Macronutrient Retention and Release from Soilless Substrate

Effect of Biochar Type on Macronutrient Retention and Release from Soilless Substrate

Biochar Affects Macronutrient Leaching from a Soilless Substrate

Crecimiento Y Calidad Del Tallo Floral De Freesia X Hybrida en Hidroponía

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