Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay

Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay

In Paraguay sesame (Sesamum indicum L.) is becoming less productive due to degradation of soil fertility. Nitrogen fertilization increases yields in soils poor in this nutrient, but little is known about its efficiency. In the study the isotopic technique was used to determine the fate of N applied to a crop of sesame. In the experimental field of the Facultad de Ciencias Agrarias of the Universidad Nacional de Asunción, Paraguay, in a randomized complete block experimental design, it was studied the efficiency in the application of N fertilizer and green manure (lupine + black oat) with and without tillage. Nitrogen was applied as urea-15N (5% enrichment) at 50 kg/ha. The results showed content (kg/ha) of N in grains(84), dry matter (104) and soil to 15 cm (938). The plant absorbed 20% of the applied N, 42% remained in the soil and 38% could not be accounted for and possibly it was lost by leaching and volatilization. The isotope dilution technique was useful in determining the fate of applied N, but overestimated the contribution of green manures on the soil N content.

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Main Authors: González, Alba Liz, Causarano Medina, Héctor Javier
Format: Digital revista
Language:spa
Published: Universidad Nacional de Colombia - Sede Palmira 2014
Online Access:https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/42259
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spelling oai:www.revistas.unal.edu.co:article-422592014-11-05T14:57:18Z Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay Destino del nitrógeno aplicado a un cultivo de sésamo en un suelo degradado de Paraguay González, Alba Liz Causarano Medina, Héctor Javier Sesamum indicum isotopic technique 15N Sesamum indicum técnicas isotópicas 15N In Paraguay sesame (Sesamum indicum L.) is becoming less productive due to degradation of soil fertility. Nitrogen fertilization increases yields in soils poor in this nutrient, but little is known about its efficiency. In the study the isotopic technique was used to determine the fate of N applied to a crop of sesame. In the experimental field of the Facultad de Ciencias Agrarias of the Universidad Nacional de Asunción, Paraguay, in a randomized complete block experimental design, it was studied the efficiency in the application of N fertilizer and green manure (lupine + black oat) with and without tillage. Nitrogen was applied as urea-15N (5% enrichment) at 50 kg/ha. The results showed content (kg/ha) of N in grains(84), dry matter (104) and soil to 15 cm (938). The plant absorbed 20% of the applied N, 42% remained in the soil and 38% could not be accounted for and possibly it was lost by leaching and volatilization. The isotope dilution technique was useful in determining the fate of applied N, but overestimated the contribution of green manures on the soil N content. En Paraguay el cultivo de sésamo (Sesamum indicum L.) es cada vez menos productivo debido a la degradación de la fertilidad de los suelos. La fertilización nitrogenada eleva los rendimientos en suelos pobres en este nutriente, pero su eficiencia aún no es bien conocida. En el estudio se utilizó la técnica isotópica para determinar el destino del N aplicado a un cultivo de sésamo. En el campo experimental de la Facultad de Ciencias Agrarias de la Universidad Nacional de Asunción, Paraguay, en un diseño experimental de bloques completos al azar se estudió la eficiencia en la aplicación de N como fertilizante y abono verde (lupino + avena negra) con y sin laboreo del suelo. El N fue aplicado como urea-15N (5% enriquecimiento) a razón de 50 kg/ha. Los resultados mostraron contenidos (kg/ha) de N en granos (84), materia seca (104) y suelo hasta 15 cm (938). El 20% del N aplicado fue absorbido por la planta, 42% permaneció en el suelo y 38% no pudo contabilizarse y posiblemente se perdió por lixiviación y volatilización. La técnica de dilución isotópica fue útil para determinar el destino del N aplicado, pero sobreestimó el aporte de los abonos verdes en el contenido de N en el suelo. Universidad Nacional de Colombia - Sede Palmira 2014-07-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/42259 10.15446/acag.v63n3.42259 Acta Agronómica; Vol. 63 No. 3 (2014); 253 - 261 Acta Agronómica; Vol. 63 Núm. 3 (2014); 253 - 261 Acta Agronómica; v. 63 n. 3 (2014); 253 - 261 2323-0118 0120-2812 spa https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/42259/46171 https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/42259/48396 Derechos de autor 2014 Acta Agronómica https://creativecommons.org/licenses/by-nc-nd/4.0
institution UNAL
collection OJS
country Colombia
countrycode CO
component Revista
access En linea
databasecode rev-actaagronomica
tag revista
region America del Sur
libraryname Sistema Nacional de Bibliotecas de la UNAL
language spa
format Digital
author González, Alba Liz
Causarano Medina, Héctor Javier
spellingShingle González, Alba Liz
Causarano Medina, Héctor Javier
Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay
author_facet González, Alba Liz
Causarano Medina, Héctor Javier
author_sort González, Alba Liz
title Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay
title_short Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay
title_full Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay
title_fullStr Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay
title_full_unstemmed Fate of nitrogen applied to a sesame crop (Sesamum indicum L.) in a degraded soil of Paraguay
title_sort fate of nitrogen applied to a sesame crop (sesamum indicum l.) in a degraded soil of paraguay
description In Paraguay sesame (Sesamum indicum L.) is becoming less productive due to degradation of soil fertility. Nitrogen fertilization increases yields in soils poor in this nutrient, but little is known about its efficiency. In the study the isotopic technique was used to determine the fate of N applied to a crop of sesame. In the experimental field of the Facultad de Ciencias Agrarias of the Universidad Nacional de Asunción, Paraguay, in a randomized complete block experimental design, it was studied the efficiency in the application of N fertilizer and green manure (lupine + black oat) with and without tillage. Nitrogen was applied as urea-15N (5% enrichment) at 50 kg/ha. The results showed content (kg/ha) of N in grains(84), dry matter (104) and soil to 15 cm (938). The plant absorbed 20% of the applied N, 42% remained in the soil and 38% could not be accounted for and possibly it was lost by leaching and volatilization. The isotope dilution technique was useful in determining the fate of applied N, but overestimated the contribution of green manures on the soil N content.
publisher Universidad Nacional de Colombia - Sede Palmira
publishDate 2014
url https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/42259
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AT causaranomedinahectorjavier fateofnitrogenappliedtoasesamecropsesamumindicumlinadegradedsoilofparaguay
AT gonzalezalbaliz destinodelnitrogenoaplicadoauncultivodesesamoenunsuelodegradadodeparaguay
AT causaranomedinahectorjavier destinodelnitrogenoaplicadoauncultivodesesamoenunsuelodegradadodeparaguay
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