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Registros recuperados : 128 | |
1. | | Morón, A. Alfalfa y fertilidad de suelos ln: "Consorcios Regionales de Experimentación Agrícola; Instituto Nacional de Investigación Agropecuaria (Uruguay) ". Jornada sobre alfalfa. [s.l.]: INIA La Estanzuela, 1996. p. 10-12Biblioteca(s): INIA La Estanzuela. |
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3. | | MORON, A. Azufre: consideraciones sobre su situación en Uruguay In: MORON, A.; MARTINO, D.; SAWCHIK, J. (Eds.). Manejo y fertilidad de suelos . Montevideo (Uruguay): INIA, 1996. p. 73-79 (INIA Serie Técnica ; 76) Información presentada en el II Curso de Actualización Técnica Manejo y Fertilidad de Suelos, 1995 set 4-8, La EstanzuelaBiblioteca(s): INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó. |
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7. | | Morón, A. Descomposición de rastrojos ln: Reunión Técnica Viabilización de la Siembra Directa en Sistemas Mixtos de Producción, 1998 abr 22-24 : La Estanzuela, Colonia [Memorias]. La Estanzuela, Colonia (Uruguay): INIA ; Programa Cooperativo para el Desarrollo Tecnológico Agropecuario del Cono Sur, 1998. p27Biblioteca(s): INIA La Estanzuela. |
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8. | | MORON, A. El ciclo del nitrógeno en el sistema suelo-planta-animal In: MORON, A.; RISSO, D. (Coords.). Nitrógeno en pasturas Seminario de Actualización Técnica INIA La Estanzuela, 13 octubre de 1994. Montevideo (Uruguay): INIA, 1994. p. 1-12 (INIA Serie Técnica ; 51)Biblioteca(s): INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó. |
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9. | | MORON, A. El Ciclo del nitrogeno en el sistema suelo-planta-animal In: RISSO, D.; BERRETTA, E.J.; MORON, A. (Eds.). Producción y manejo de pasturas. Seminario técnico, 17-19 octubre 1995, INIA Tacuarembó. Montevideo (Uruguay): INIA, 1996. p21-32 (INIA Serie Técnica; 80)Biblioteca(s): INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó. |
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10. | | MORON, A. Dinámica del fósforo en tres sistemas agrícolas en el suroeste de Uruguay: resumen In: ASOCIACIÓN DE INGENIEROS AGRÓNOMOS REGIONALES; INIA (INSTITUTO NACIONAL DE INVESTIGACIÓN AGROPECUARIA); SIMPOSIO SUSTENTABILIDAD DE LAS ROTACIONES CULTIVO - PASTURA, 8-9 AGOSTO 1991, PAYSANDÚ, URUGUAY. Resumenes. Montevideo (Uruguay): INIA, 1991. p.5 (INIA Serie Tecnica; 11) Trabajos publicados en la Revista INIA Investigaciones Agronómicas 1992 v.1(1)Biblioteca(s): INIA La Estanzuela; INIA Las Brujas; INIA Tacuarembó. |
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13. | | MORON, A. Dinámica del nitrógeno en rotaciones. ln: Curso de actualización en fertilidad de suelos, 6-8 Junio, Montevideo, 1996. Montevideo: Facultad de Agronomía. Instituto Clemente Estable, 1996. p. 3-12Biblioteca(s): INIA Tacuarembó. |
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14. | | MORON, A. Efecto de las Rotaciones y el Laboreo en la Calidad del Suelo. In: INIA LA ESTANZUELA. Sustentabilidad de la intensificación agrícola en el Uruguay. Resumenes del Simposio Mercedes, (Uruguay): INIA, 2004. p. 7-9. (INIA Serie Actividades de Difusión ; 365). "Instituto de la Potasa y el Fósforo; Fertilizar"Biblioteca(s): INIA La Estanzuela; INIA Treinta y Tres. |
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Registros recuperados : 128 | |
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| Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
Fecha actual : |
28/11/2018 |
Actualizado : |
28/11/2018 |
Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
Circulación / Nivel : |
Internacional - -- |
Autor : |
NÚÑEZ, A.; MORON, A. |
Afiliación : |
AGUSTIN NUÑEZ RUSSI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; DAVID ALEJANDRO MORON YACOEL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay. |
Título : |
Potassium dynamics in western uruguayan agricultural mollisols. |
Fecha de publicación : |
2017 |
Fuente / Imprenta : |
Communications in Soil Science and Plant Analysis, 30 November 2017, Volume 48, Issue 21, Pages 2558-2572. |
DOI : |
10.1080/00103624.2017.1416134 |
Idioma : |
Inglés |
Notas : |
Article history: Received 4 January 2017 // Accepted 13 November 2017. |
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 |
Palabras claves : |
ILLITE; NONEXCHANGEABLE POTASSIUM; POTASSIUM RESERVES; SODIUM TETRAPHENYLBORON. |
Asunto categoría : |
-- |
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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