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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha : |
28/11/2018 |
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Actualizado : |
28/11/2018 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
NÚÑEZ, A.; MORON, A. |
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Afiliación : |
AGUSTIN NUÑEZ RUSSI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DAVID ALEJANDRO MORON YACOEL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
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Título : |
Potassium dynamics in western uruguayan agricultural mollisols. |
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Fecha de publicación : |
2017 |
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Fuente / Imprenta : |
Communications in Soil Science and Plant Analysis, 30 November 2017, Volume 48, Issue 21, Pages 2558-2572. |
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DOI : |
10.1080/00103624.2017.1416134 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 4 January 2017 // Accepted 13 November 2017. |
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Contenido : |
ABSTRACT.
Knowledge of soil potassium (K) dynamics and quantification of plant-available K reserves are essential for the correct management of this nutrient. The objectives of this study, conducted in six Uruguayan mollisols, were to (i) determine the contribution of plant-available nonexchangeable K to plant nutrition, (ii) compare the ability of the ammonium acetate (NH4OAc) method and the sodium tetraphenylboron (NaBPh4) method to determine plant-available K, and (iii) quantify the effect of K fixation and release processes on the ability of both methods to estimate changes in K availability due to different K balances. In a greenhouse experiment, perennial ryegrass (Lolium perenne, cv. Horizon) was grown over a period of 320 days in six soils fertilized with 0, 100, 200, and 400 mg K kg?1. We measured plant K uptake and the changes in soil K status related to different K balances using NH4OAc and NaBPh4. Use of NaBPh4 resulted in a more accurate determination of plant-available K (R2 = 0.97 vs. 0.78) and soil K balance (R2 = 0.73 vs. 0.63), but neither of the methods was suitable for identifying positive K balances. However, when positive balances were established by K addition and incubation without plant growth, both methods related well with K balances. Again, NaBPh4 was better than NH4OAc (R2 = 0.98 and 0.88, respectively). The more accurate determination of plant K uptake and the strongest relationship with K balance of NaBPh4 was due to the extraction of exchangeable K plus a proportion of plant-available nonexchangeable K. Soil?plant interactions enhance soil K fixation in forms that are available to plant absorption but are not extractable by the chemical methods considered in this study.
© 2017 Taylor & Francis. MenosABSTRACT.
Knowledge of soil potassium (K) dynamics and quantification of plant-available K reserves are essential for the correct management of this nutrient. The objectives of this study, conducted in six Uruguayan mollisols, were to (i) determine the contribution of plant-available nonexchangeable K to plant nutrition, (ii) compare the ability of the ammonium acetate (NH4OAc) method and the sodium tetraphenylboron (NaBPh4) method to determine plant-available K, and (iii) quantify the effect of K fixation and release processes on the ability of both methods to estimate changes in K availability due to different K balances. In a greenhouse experiment, perennial ryegrass (Lolium perenne, cv. Horizon) was grown over a period of 320 days in six soils fertilized with 0, 100, 200, and 400 mg K kg?1. We measured plant K uptake and the changes in soil K status related to different K balances using NH4OAc and NaBPh4. Use of NaBPh4 resulted in a more accurate determination of plant-available K (R2 = 0.97 vs. 0.78) and soil K balance (R2 = 0.73 vs. 0.63), but neither of the methods was suitable for identifying positive K balances. However, when positive balances were established by K addition and incubation without plant growth, both methods related well with K balances. Again, NaBPh4 was better than NH4OAc (R2 = 0.98 and 0.88, respectively). The more accurate determination of plant K uptake and the strongest relationship with K balance of NaBPh4 was due to the extraction of exchangea... Presentar Todo |
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Palabras claves : |
ILLITE; NONEXCHANGEABLE POTASSIUM; POTASSIUM RESERVES; SODIUM TETRAPHENYLBORON. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 02475naa a2200205 a 4500
001 1059316
005 2018-11-28
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1080/00103624.2017.1416134$2DOI
100 1 $aNÚÑEZ, A.
245 $aPotassium dynamics in western uruguayan agricultural mollisols.$h[electronic resource]
260 $c2017
500 $aArticle history: Received 4 January 2017 // Accepted 13 November 2017.
520 $aABSTRACT. Knowledge of soil potassium (K) dynamics and quantification of plant-available K reserves are essential for the correct management of this nutrient. The objectives of this study, conducted in six Uruguayan mollisols, were to (i) determine the contribution of plant-available nonexchangeable K to plant nutrition, (ii) compare the ability of the ammonium acetate (NH4OAc) method and the sodium tetraphenylboron (NaBPh4) method to determine plant-available K, and (iii) quantify the effect of K fixation and release processes on the ability of both methods to estimate changes in K availability due to different K balances. In a greenhouse experiment, perennial ryegrass (Lolium perenne, cv. Horizon) was grown over a period of 320 days in six soils fertilized with 0, 100, 200, and 400 mg K kg?1. We measured plant K uptake and the changes in soil K status related to different K balances using NH4OAc and NaBPh4. Use of NaBPh4 resulted in a more accurate determination of plant-available K (R2 = 0.97 vs. 0.78) and soil K balance (R2 = 0.73 vs. 0.63), but neither of the methods was suitable for identifying positive K balances. However, when positive balances were established by K addition and incubation without plant growth, both methods related well with K balances. Again, NaBPh4 was better than NH4OAc (R2 = 0.98 and 0.88, respectively). The more accurate determination of plant K uptake and the strongest relationship with K balance of NaBPh4 was due to the extraction of exchangeable K plus a proportion of plant-available nonexchangeable K. Soil?plant interactions enhance soil K fixation in forms that are available to plant absorption but are not extractable by the chemical methods considered in this study. © 2017 Taylor & Francis.
653 $aILLITE
653 $aNONEXCHANGEABLE POTASSIUM
653 $aPOTASSIUM RESERVES
653 $aSODIUM TETRAPHENYLBORON
700 1 $aMORON, A.
773 $tCommunications in Soil Science and Plant Analysis, 30 November 2017, Volume 48, Issue 21, Pages 2558-2572.
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| 2. |  | JÁUREGUI, J.M.; MICHELINI, D.F.; SEVILLA, G.H.; BERHONGARAY, G.; BERONE, G.D.; BAUDRACCO, J.; CHILIBROSTE, P.; AGNUSDEI, M.G.; LATTANZI, F. Tall fescue tiller survival over summer in a subtropical environment: The role of the size and depth of root systems. Journal of Agronomy and Crop Science. 2024, Volume 210, Issue 1, article e12682. https://doi.org/10.1111/jac.12682 Article history: Received 5 May 2023; Revised 20 October 2023; Accepted 1 November 2023. -- Correspondence: J. M. Jáuregui, Facultad de Ciencias Agrarias, Universidad Nacional del Litoral, Esperanza, Argentina. Email:...| Tipo: Artículos en Revistas Indexadas Internacionales | Circulación / Nivel : Internacional - -- |
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