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| 1. |  | TONN, B.; PORATH, I.; LATTANZI, F.; ISSELSTEIN, J. Urine effects on grass and legume nitrogen isotopic composition: Pronounced short-term dynamics of ?15 N. (Research article). PLoS ONE, January 2019, Volume 14, Issue 1, Article number e0210623. OPEN ACCESS. 15 p. History Article: Received: June 14, 2017; Accepted: December 29, 2018; Published: January 16, 2019.| Biblioteca(s): INIA Treinta y Tres. |
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| Registros recuperados : 1 | |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha actual : |
29/01/2019 |
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Actualizado : |
11/10/2019 |
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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 : |
TONN, B.; PORATH, I.; LATTANZI, F.; ISSELSTEIN, J. |
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Afiliación : |
BETTINA TONN, Department of Crop Sciences, Grassland Science, University of Goettingen, Goettingen, Germany; INA PORATH, Department of Crop Sciences, Grassland Science, University of Goettingen, Goettingen, Germany; FERNANDO A. LATTANZI, Lehrstuhl für Grünlandlehre, Technische Universität München, Freising-Weihenstephan, Germany. INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JOHANNES ISSELSTEIN, Department of Crop Sciences, Grassland Science, University of Goettingen, Goettingen, Germany. Centre for biodiversity and Sustainable Land Use, Goettingen, Goeettingen, Germany. |
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Título : |
Urine effects on grass and legume nitrogen isotopic composition: Pronounced short-term dynamics of ?15 N. (Research article). |
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Fecha de publicación : |
2019 |
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Fuente / Imprenta : |
PLoS ONE, January 2019, Volume 14, Issue 1, Article number e0210623. OPEN ACCESS. |
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Páginas : |
15 p. |
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ISSN : |
1932-6203 |
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DOI : |
10.1371/journal.pone.0210623 |
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Idioma : |
Inglés |
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Notas : |
History Article: Received: June 14, 2017; Accepted: December 29, 2018; Published: January 16, 2019. |
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Contenido : |
Nitrogen stable isotope (15N) natural abundance is widely used to study nitrogen cycling. In grazed ecosystems, urine patches are hot-spots of nitrogen inputs, losses, and changes in ?15N. Understanding ?15N dynamics in urine-affected vegetation is therefore crucial for accurate inferences from 15N natural abundance in grasslands. We hypothesized that leaf ?15N following urine deposition varies with time and plant functional group. Specifically, we expected (i) short-term decreases in ?15N due to foliar absorption of 15N-depleted volatilized ammonia, (ii) followed by increases in ?15N due to uptake of 15N-enriched soil inorganic nitrogen, and (iii) that the magnitude of these changes is less in legumes than in grasses. The latter should be expected because ammonia absorption depends on leaf nitrogen concentration, which is higher in legumes than grasses, and because biological nitrogen fixation will modify the influence of urine-derived nitrogen on ?15N in legumes. We applied cattle urine to a mixture of Lolium perenne and Trifolium repens in a pot experiment. Nitrogen concentration and ?15N were determined for successive leaf cohorts and bulk biomass either 17 (early) or 32 (late) days after urine application. Early after urine application, leaves of L. perenne were 15N-depleted compared to control plants (?15N 0.1 vs. 5.8?, respectively), but leaves of T. repens were not (-1.1 vs. -1.1?, respectively). Later, both species increased their ?15N, but T. repens (4.5?) less so than L. perenne (5.9?). Vegetation sampled within and outside urine patches in the field further supported these results. Our findings confirm that foliar ammonia uptake can substantially decrease grass foliar ?15N, and that in both grass and legume the direction of the ?15N response to urine changes over time. Temporal dynamics of plant ?15N at urine patches therefore need to be explicitly addressed when 15N natural abundance is used to study nitrogen cycling in grazed grasslands. MenosNitrogen stable isotope (15N) natural abundance is widely used to study nitrogen cycling. In grazed ecosystems, urine patches are hot-spots of nitrogen inputs, losses, and changes in ?15N. Understanding ?15N dynamics in urine-affected vegetation is therefore crucial for accurate inferences from 15N natural abundance in grasslands. We hypothesized that leaf ?15N following urine deposition varies with time and plant functional group. Specifically, we expected (i) short-term decreases in ?15N due to foliar absorption of 15N-depleted volatilized ammonia, (ii) followed by increases in ?15N due to uptake of 15N-enriched soil inorganic nitrogen, and (iii) that the magnitude of these changes is less in legumes than in grasses. The latter should be expected because ammonia absorption depends on leaf nitrogen concentration, which is higher in legumes than grasses, and because biological nitrogen fixation will modify the influence of urine-derived nitrogen on ?15N in legumes. We applied cattle urine to a mixture of Lolium perenne and Trifolium repens in a pot experiment. Nitrogen concentration and ?15N were determined for successive leaf cohorts and bulk biomass either 17 (early) or 32 (late) days after urine application. Early after urine application, leaves of L. perenne were 15N-depleted compared to control plants (?15N 0.1 vs. 5.8?, respectively), but leaves of T. repens were not (-1.1 vs. -1.1?, respectively). Later, both species increased their ?15N, but T. repens (4.5?) less so ... Presentar Todo |
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Palabras claves : |
CAPTACIÓN DE AMONÍACO FOLIAR; DINÁMICA DEL NITRÓGENO; ECOSISTEMAS PASTORILES; FOLIAR AMMONIA; GRAZED ECOSYSTEMS; NITROGEN CYCLE; ORINA BOVINA. |
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Thesagro : |
CICLO DEL NITROGENO; LOLIUM PERENNE; ORINA; TRIFOLIUM REPENS. |
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Asunto categoría : |
-- |
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URL : |
http://www.ainfo.inia.uy/digital/bitstream/item/12355/1/Latanzi-Plos-One-2019-1.pdf
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Marc : |
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008 2019 bl uuuu u00u1 u #d
022 $a1932-6203
024 7 $a10.1371/journal.pone.0210623$2DOI
100 1 $aTONN, B.
245 $aUrine effects on grass and legume nitrogen isotopic composition$bPronounced short-term dynamics of ?15 N. (Research article).$h[electronic resource]
260 $c2019
300 $a15 p.
500 $aHistory Article: Received: June 14, 2017; Accepted: December 29, 2018; Published: January 16, 2019.
520 $aNitrogen stable isotope (15N) natural abundance is widely used to study nitrogen cycling. In grazed ecosystems, urine patches are hot-spots of nitrogen inputs, losses, and changes in ?15N. Understanding ?15N dynamics in urine-affected vegetation is therefore crucial for accurate inferences from 15N natural abundance in grasslands. We hypothesized that leaf ?15N following urine deposition varies with time and plant functional group. Specifically, we expected (i) short-term decreases in ?15N due to foliar absorption of 15N-depleted volatilized ammonia, (ii) followed by increases in ?15N due to uptake of 15N-enriched soil inorganic nitrogen, and (iii) that the magnitude of these changes is less in legumes than in grasses. The latter should be expected because ammonia absorption depends on leaf nitrogen concentration, which is higher in legumes than grasses, and because biological nitrogen fixation will modify the influence of urine-derived nitrogen on ?15N in legumes. We applied cattle urine to a mixture of Lolium perenne and Trifolium repens in a pot experiment. Nitrogen concentration and ?15N were determined for successive leaf cohorts and bulk biomass either 17 (early) or 32 (late) days after urine application. Early after urine application, leaves of L. perenne were 15N-depleted compared to control plants (?15N 0.1 vs. 5.8?, respectively), but leaves of T. repens were not (-1.1 vs. -1.1?, respectively). Later, both species increased their ?15N, but T. repens (4.5?) less so than L. perenne (5.9?). Vegetation sampled within and outside urine patches in the field further supported these results. Our findings confirm that foliar ammonia uptake can substantially decrease grass foliar ?15N, and that in both grass and legume the direction of the ?15N response to urine changes over time. Temporal dynamics of plant ?15N at urine patches therefore need to be explicitly addressed when 15N natural abundance is used to study nitrogen cycling in grazed grasslands.
650 $aCICLO DEL NITROGENO
650 $aLOLIUM PERENNE
650 $aORINA
650 $aTRIFOLIUM REPENS
653 $aCAPTACIÓN DE AMONÍACO FOLIAR
653 $aDINÁMICA DEL NITRÓGENO
653 $aECOSISTEMAS PASTORILES
653 $aFOLIAR AMMONIA
653 $aGRAZED ECOSYSTEMS
653 $aNITROGEN CYCLE
653 $aORINA BOVINA
700 1 $aPORATH, I.
700 1 $aLATTANZI, F.
700 1 $aISSELSTEIN, J.
773 $tPLoS ONE, January 2019, Volume 14, Issue 1, Article number e0210623. OPEN ACCESS.
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INIA Treinta y Tres (TT) |
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