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| 3. |  | NÚÑEZ, A.; SCHIPANSKI, M. Changes in soil organic matter after conversion from irrigated to dryland cropping systems. Agriculture, Ecosystems and Environment, 2023, volume 347, article 108392. doi: https://doi.org/10.1016/j.agee.2023.108392 Article history: Received 19 September 2022; Received in revised form 10 January 2023; Accepted 1 February 2023; Available online 9 February 2023. -- Correspondence author: Núñez, A.; INIA La Estanzuela, Ruta 50 km 11, Colonia, Uruguay;...| Biblioteca(s): INIA Las Brujas. |
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| 8. | | NÚÑEZ, A.; RUBIO, V.; MOREIRA, J. Accumulated effects of contrasting phosphorus balances in the evolution of soil available phosphorus. [abstract]. Theme 1 - Phosphorus forms, availability and cycling in soils. Oral presentation. In: Michelini, D.; Garaycochea, S. (Eds.). 7th Phosphorus in Soils and Plants Symposium (PSP7). "Towards a sustainable phosphorus utilization in agroecosystems." Book of abstracts. PSP7, 3-7 October 2022, Montevideo, Uruguay. p.19. Published By: The organizing committee of the 7th Symposium on Phosphorus in Soils and Plants (PSP7)- National Agricultural Research Institute and School of Agronomy, Universidad de la República, Uruguay.| Biblioteca(s): INIA Las Brujas. |
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| 19. | | SIENRA, R.; NUÑEZ, A.; GONZÁLEZ, A.; CERETTA, M.E.; GUARINO, H.; MORÓN, C. Características hematológicas en relación a la infección por el virus de la leucosis bovina enzootica en ganado lechero: resultados preliminares. ln: Jornadas Uruguayas de Buiatría, 26., 1998, Paysandú, Uruguay Paysandú (Uruguay): Centro Médico Veterinario de Paysandú, 1998. p. 23-25| Biblioteca(s): INIA Treinta y Tres. |
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 | Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
15/03/2022 |
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Actualizado : |
15/03/2022 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
Internacional - -- |
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Autor : |
NÚÑEZ, A.; COTRUFO, M.F.; SCHIPANSKI, M. |
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Afiliación : |
AGUSTIN NUÑEZ RUSSI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay./ Department of Soil and Crop Sciences, Colorado State University, 307 University Ave., Fort Collins, CO 80523-1170, USA.; M. FRANCESCA COTRUFO, Department of Soil and Crop Sciences, Colorado State University, 307 University Ave., Fort Collins, CO 80523-1170, USA.; MEAGAN SCHIPANSKI, Department of Soil and Crop Sciences, Colorado State University, 307 University Ave., Fort Collins, CO 80523-1170, USA. |
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Título : |
Irrigation effects on the formation of soil organic matter from aboveground plant litter inputs in semiarid agricultural systems. |
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Fecha de publicación : |
2022 |
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Fuente / Imprenta : |
Geoderma, 2022, Volume 416, Article number 115804. doi: https://doi.org/10.1016/j.geoderma.2022.115804 |
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DOI : |
10.1016/j.geoderma.2022.115804 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 28 October 2021/ Revised 25 February 2022/ Accepted 25 February 2022/ Available online 7 March 2022 /Version of Record 7 March 2022. |
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Contenido : |
ABSTRACT: In semiarid agricultural systems, irrigation may increase soil organic matter (SOM) due to higher biomass
production. However, aboveground production tends to increase more than belowground biomass, and in no-till
systems SOM responses to irrigation would strongly depend on the fate of crop residues left on the soil surface.
Litter decomposition and SOM formation can also be affected by irrigation due to changes in water dynamics, but
little is known about the impacts of irrigation on the pathways of SOM formation. We used dual 13C and 15N
labeled maize litter to quantify the effect of irrigation on the contribution of aboveground crop residues to SOM
formation in semiarid, no-till agricultural systems. We incubated the litter in a continuous maize cropping system
with two treatments, dryland and irrigated, and measured litter decomposition and its contribution to different
SOM pools. Irrigation had a larger effect on litter C and N losses than on the formation of new SOM. After 13
months the C and N losses from the litter layer were 24% higher under irrigation, but there were no treatment
differences in the litter-derived C and N recovered in SOM. Most of the litter-derived organic matter (OM) was
found in the mineral associated OM pool (MAOM), but irrigation did not affect the amount of litter-derived OM
found as MAOM or as particulate organic matter. Irrigation increased the amount of litter-derived OM found in
macroaggregates, and this observation was more related to a higher aggregation than to aggregate enrichment in
the irrigated treatment. Our results suggest that a smaller proportion of aboveground crop residues will form
SOM in irrigated systems compared to dryland conditions and may help to partially explain why irrigation has a
stronger relative effect on crop productivity and C inputs than on SOC stocks in semiarid agricultural systems. MenosABSTRACT: In semiarid agricultural systems, irrigation may increase soil organic matter (SOM) due to higher biomass
production. However, aboveground production tends to increase more than belowground biomass, and in no-till
systems SOM responses to irrigation would strongly depend on the fate of crop residues left on the soil surface.
Litter decomposition and SOM formation can also be affected by irrigation due to changes in water dynamics, but
little is known about the impacts of irrigation on the pathways of SOM formation. We used dual 13C and 15N
labeled maize litter to quantify the effect of irrigation on the contribution of aboveground crop residues to SOM
formation in semiarid, no-till agricultural systems. We incubated the litter in a continuous maize cropping system
with two treatments, dryland and irrigated, and measured litter decomposition and its contribution to different
SOM pools. Irrigation had a larger effect on litter C and N losses than on the formation of new SOM. After 13
months the C and N losses from the litter layer were 24% higher under irrigation, but there were no treatment
differences in the litter-derived C and N recovered in SOM. Most of the litter-derived organic matter (OM) was
found in the mineral associated OM pool (MAOM), but irrigation did not affect the amount of litter-derived OM
found as MAOM or as particulate organic matter. Irrigation increased the amount of litter-derived OM found in
macroaggregates, and this observation ... Presentar Todo |
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Palabras claves : |
13C; 15N; Aggregates; Litter decomposition; Physical fractionation; Table isotopes. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 02845naa a2200241 a 4500
001 1062838
005 2022-03-15
008 2022 bl uuuu u00u1 u #d
024 7 $a10.1016/j.geoderma.2022.115804$2DOI
100 1 $aNÚÑEZ, A.
245 $aIrrigation effects on the formation of soil organic matter from aboveground plant litter inputs in semiarid agricultural systems.$h[electronic resource]
260 $c2022
500 $aArticle history: Received 28 October 2021/ Revised 25 February 2022/ Accepted 25 February 2022/ Available online 7 March 2022 /Version of Record 7 March 2022.
520 $aABSTRACT: In semiarid agricultural systems, irrigation may increase soil organic matter (SOM) due to higher biomass production. However, aboveground production tends to increase more than belowground biomass, and in no-till systems SOM responses to irrigation would strongly depend on the fate of crop residues left on the soil surface. Litter decomposition and SOM formation can also be affected by irrigation due to changes in water dynamics, but little is known about the impacts of irrigation on the pathways of SOM formation. We used dual 13C and 15N labeled maize litter to quantify the effect of irrigation on the contribution of aboveground crop residues to SOM formation in semiarid, no-till agricultural systems. We incubated the litter in a continuous maize cropping system with two treatments, dryland and irrigated, and measured litter decomposition and its contribution to different SOM pools. Irrigation had a larger effect on litter C and N losses than on the formation of new SOM. After 13 months the C and N losses from the litter layer were 24% higher under irrigation, but there were no treatment differences in the litter-derived C and N recovered in SOM. Most of the litter-derived organic matter (OM) was found in the mineral associated OM pool (MAOM), but irrigation did not affect the amount of litter-derived OM found as MAOM or as particulate organic matter. Irrigation increased the amount of litter-derived OM found in macroaggregates, and this observation was more related to a higher aggregation than to aggregate enrichment in the irrigated treatment. Our results suggest that a smaller proportion of aboveground crop residues will form SOM in irrigated systems compared to dryland conditions and may help to partially explain why irrigation has a stronger relative effect on crop productivity and C inputs than on SOC stocks in semiarid agricultural systems.
653 $a13C
653 $a15N
653 $aAggregates
653 $aLitter decomposition
653 $aPhysical fractionation
653 $aTable isotopes
700 1 $aCOTRUFO, M.F.
700 1 $aSCHIPANSKI, M.
773 $tGeoderma, 2022, Volume 416, Article number 115804. doi: https://doi.org/10.1016/j.geoderma.2022.115804
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