Growth and nutritional response of hardwood seedlings to controlled-release fertilization at outplanting

Jacobs, Douglass F.; Salifu, K. Francis; Seifert, John R.

doi:10.1016/j.foreco.2005.03.053

Cited by 95 publications

(67 citation statements)

References 42 publications

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Section: Introductionmentioning

confidence: 99%

“…For example, low nitrogen (N) availability has been noted to limit growth and establishment success of hardwood plantations in the eastern USA [25,26]. Susceptibility to nutrient stress can be alleviated by fertilization at outplanting [5,26]. Hence, there is increased interest to fertilize seedlings at outplanting as a means to accelerate plant growth and improve afforestation and (or) reforestation success [4,24,26].…”

Section: Introductionmentioning

confidence: 99%

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Growth, physiology, and nutrient retranslocation in nitrogen-15 fertilized Quercus rubra seedlings

et al. 2008

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-We evaluated gas exchange, chlorophyll index (CI) using SPAD-502 chlorophyll meter, and leaf nutritional responses in one-year-old northern red oak (Quercus rubra L.) container seedlings transplanted into control (unfertilized) or fertilized (0.86 g N plant −1 ) sand culture and grown in a greenhouse for 90 days. We labeled current nitrogen (N) uptake with ( 15 NH 4 ) 2 SO 4 and directly quantified proportional contributions of N derived from fertilizer (NF) compared with retranslocation or N derived from plant (NP) in leaf growth of red oak seedlings. NF met a greater N demand in leaf growth of fertilized plants while unfertilized seedlings relied entirely on NP for their leaf growth. Fertilization increased leaf dry mass by 67% and new stem dry mass by 253% 90 days after transplanting compared to control seedlings. Specific leaf area (SLA) was not significantly altered but CI increased 90 days after transplanting. Higher leaf N concentration and content in fertilized compared with control seedlings was linked to greater chlorophyll concentrations in the former plants. The higher coefficient of determination (r 2 = 0.72) noted between leaf N concentrations and CI suggests that the SPAD meter could be a useful tool for assessing leaf N status in northern red oak seedlings. Fertilized seedlings exhibited higher net assimilation, stomatal conductance, and transpiration rates compared with controls. Increased seedling growth in response to fertilization was related to maintenance of higher gas exchange and greater nutrient uptake, which could improve outplanting success. fertilization / gas exchange / northern red oak / nitrogen / photosynthesis / retranslocation / SPAD meter Résumé -Croissance, échanges gazeux et réponses nutritionnelles de jeunes semis de Quercus rubra soumis à une fertilisation par ( 15 NH 4 ) 2 SO 4 . Nous avons estimé les échanges gazeux foliaires, un index de teneurs en chlorophylles (IC) avec un chlorophylle-mètre SPAD-502 et les teneurs en nutriments dans les feuilles de jeunes plants de chêne rouge d'Amérique (Quercus rubra L.) âgés d'un an. Les plants ont été transplantés dans du substrat sableux non fertilisé (témoins) ou fertilisé avec 0.86 g N par plante, et cultivés pendant 90 jours sous serre. L'azote apporté par la fertilisation était marqué avec ( 15 NH 4 ) 2 SO 4 et nous avons directement quantifié les contributions à la croissance foliaire de N apporté par la fertilisation (NF) par rapport à celle de N remobilisé depuis les pools de réserve de la plante (NP). NF constituait la fraction la plus importante d'azote foliaire de plants fertilisés, alors que l'azote foliaire des plants non fertilisés était exclusivement constitué de NP. La fertilisation s'est traduite par une augmentation, par rapport aux plantes témoins, de 67 % de la biomasse foliaire et de 253 % de la biomasse de tiges nouvellement formées 90 jours après la transplantation. La surface spécifique des feuilles n'était pas affectée par la fertilisation alors que CI avait significativement augmenté. Des teneur...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Growth, physiology, and nutrient retranslocation in nitrogen-15 fertilized Quercus rubra seedlings

et al. 2008

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“…Estos resultados no muestran una correspondencia con la literatura del tema, la que señala la existencia de efectos residuales en terreno de la FLC (Oliet et al 1999, Jacobs et al 2005, Hathaway y Whitcomb 1977 y que las plantas con mayor diámetro de cuello o menor relación H/D (lo que se obtiene con poda apical) logran mejores desempeños en terreno, al menos en zonas templadas (Wilson y Jacobs 2006). Son varias las posibles respuestas a la ausencia de efectos significativos de estas actividades en el desarrollo en terreno de las plantas.…”

Section: Discusión Y Conclusionesunclassified

“…La fertilización puede provocar un aumento o un menoscabo en el crecimiento de las plantas, tanto en la parte aérea como radicular, alterando el nivel nutricional de los tejidos y su consecuente reserva. Por consiguiente, esta práctica de vivero puede afectar la capacidad de arraigamiento, la resistencia al estrés hídrico y térmico y la susceptibilidad a enfermedades (Oliet et al 1999, Alzugaray et al 2004, Fan et al 2004, Jacobs et al 2005. Los esquemas de fertilización en vivero han cambiado en los últimos 20 años y, actualmente, la incorporación de fertilizantes de entrega controlada (FLC) en el tiempo ha sido ampliamente utilizada y validada por permitir mejores tasas de supervivencia y crecimientos en comparación a la fertilización tradicional (Oliet et al 1999, Jacobs et al 2005.…”

Section: Introductionunclassified

“…Por consiguiente, esta práctica de vivero puede afectar la capacidad de arraigamiento, la resistencia al estrés hídrico y térmico y la susceptibilidad a enfermedades (Oliet et al 1999, Alzugaray et al 2004, Fan et al 2004, Jacobs et al 2005. Los esquemas de fertilización en vivero han cambiado en los últimos 20 años y, actualmente, la incorporación de fertilizantes de entrega controlada (FLC) en el tiempo ha sido ampliamente utilizada y validada por permitir mejores tasas de supervivencia y crecimientos en comparación a la fertilización tradicional (Oliet et al 1999, Jacobs et al 2005. La aplicación de FLC en vivero se hace con la finalidad de nutrir las plantas durante su desarrollo en esta etapa y, si la dosis es apropiada, también puede servir de fertilizante durante los primeros años de crecimiento en la plantación en terreno.…”

Section: Introductionunclassified

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Efectos de la poda de tallo y fertilización de liberación controlada en vivero sobre el comportamiento de plántulas de Nothofagus nervosa en terreno

2009

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Cassava starch‐graft‐poly(acrylonitrile)‐coated urea fertilizer with sustained release and water retention properties

et al. 2018

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Cassava starch-graft-poly(acrylonitrile) samples were synthesized by a free radicalinitiated polymerization reaction, and urea fertilizer was coated with these grafted starches to obtain the dual benefit of sustained release and water retention properties.A response surface design was used to optimize the synthetic conditions of starchgraft-copolymers to maximize the slow nutrient release and water absorbency. The FT-IR analysis confirmed the grafting reaction, and scanning electron micrographs revealed the ultrastructure of polymer coating. The release of nitrogen in soil from coated urea was more sustained than that from uncoated urea and it varied with grafting level of the polymer. The uncoated urea showed almost complete release of nitrogen by 1 month, whereas %N release was in the range of 69.8%-78.3% from the grafted starch-coated urea even after 108 days of incubation. The water retention capacity of the coated urea ranged from 74.2% to 426.6% and it decreased with increase in % grafting of the coating material. K E Y W O R D S cassava starch, controlled release urea, grafted starch, soil incubation, water absorbency 2688 | JYOTHI eT al. How to cite this article: Jyothi AN, Pillai SS, Aravind M, Salim SA, Kuzhivilayil SJ. Cassava starch-graftpoly(acrylonitrile)-coated urea fertilizer with sustained release and water retention properties. Adv Polym

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Growth and nutritional response of hardwood seedlings to controlled-release fertilization at outplanting

Cited by 95 publications

References 42 publications

Growth, physiology, and nutrient retranslocation in nitrogen-15 fertilized Quercus rubra seedlings

Growth, physiology, and nutrient retranslocation in nitrogen-15 fertilized Quercus rubra seedlings

Efectos de la poda de tallo y fertilización de liberación controlada en vivero sobre el comportamiento de plántulas de Nothofagus nervosa en terreno

Cassava starch‐graft‐poly(acrylonitrile)‐coated urea fertilizer with sustained release and water retention properties

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