Nitrogen dynamics in a feedlot soil

The feedlot system (FL) generates a high input of sewage causing imbalances in the cycling process of nitrogen (N) as well as a potential negative impact on the environment. The objective of this study was to deepen into the dynamics of N in a FL's soil so as to provide tools to reduce its envi...

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Autores principales:	Wyngaard,N, Videla,C, Picone,L, Zamuner,E, Maceira,N
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2012
Materias:	feedlot system mineral nitrogen urea nitrogen urease activity
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000300016
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spelling	oai:scielo:S0718-951620120003000162014-03-10Nitrogen dynamics in a feedlot soilWyngaard,NVidela,CPicone,LZamuner,EMaceira,N feedlot system mineral nitrogen urea nitrogen urease activity The feedlot system (FL) generates a high input of sewage causing imbalances in the cycling process of nitrogen (N) as well as a potential negative impact on the environment. The objective of this study was to deepen into the dynamics of N in a FL's soil so as to provide tools to reduce its environmental impact. The study was conducted in a FL, located in Balcarce County (Buenos Aires, Argentina). Soil samples were taken between November 2006 and May 2007 in a control Pasture, in the FL-High (Upper Slope position) and FL-Low (Lower Slope position) of the FL, and in the runoff area (RA). Urease activity and concentrations of Ammonium-N, Nitrate-N and urea-N were evaluated in the soil up to 60 cm depth. Urea-N values were always low (6 mg kg-1), due to the high urease activity measured (438 mg kg-1). Ammonium-N concentration was highest in FL-Low, reaching a value of 65.5 mg kg-1 at 40-60 cm soil depth. Nitrate-N concentration was highest in FL-High for all depths, with a maximum concentration of 97.4 mg kg-1 in the 0-10 cm layer; at 40-60 cm depth, Nitrate-N concentration in FL was 31.98 mg kg-1, higher than that in Pasture (1.21 mg kg-1). There were no differences in Nitrate-N concentration between Pasture and RA; hence, it can be inferred that there was no transport of nitrate by surface water flow from the FL to RA. However, the potential for groundwater contamination via nitrate, a mobile soil constituent, should be studied.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.12 n.3 20122012-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000300016en10.4067/S0718-95162012005000016
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	feedlot system mineral nitrogen urea nitrogen urease activity
spellingShingle	feedlot system mineral nitrogen urea nitrogen urease activity Wyngaard,N Videla,C Picone,L Zamuner,E Maceira,N Nitrogen dynamics in a feedlot soil
description	The feedlot system (FL) generates a high input of sewage causing imbalances in the cycling process of nitrogen (N) as well as a potential negative impact on the environment. The objective of this study was to deepen into the dynamics of N in a FL's soil so as to provide tools to reduce its environmental impact. The study was conducted in a FL, located in Balcarce County (Buenos Aires, Argentina). Soil samples were taken between November 2006 and May 2007 in a control Pasture, in the FL-High (Upper Slope position) and FL-Low (Lower Slope position) of the FL, and in the runoff area (RA). Urease activity and concentrations of Ammonium-N, Nitrate-N and urea-N were evaluated in the soil up to 60 cm depth. Urea-N values were always low (6 mg kg-1), due to the high urease activity measured (438 mg kg-1). Ammonium-N concentration was highest in FL-Low, reaching a value of 65.5 mg kg-1 at 40-60 cm soil depth. Nitrate-N concentration was highest in FL-High for all depths, with a maximum concentration of 97.4 mg kg-1 in the 0-10 cm layer; at 40-60 cm depth, Nitrate-N concentration in FL was 31.98 mg kg-1, higher than that in Pasture (1.21 mg kg-1). There were no differences in Nitrate-N concentration between Pasture and RA; hence, it can be inferred that there was no transport of nitrate by surface water flow from the FL to RA. However, the potential for groundwater contamination via nitrate, a mobile soil constituent, should be studied.
author	Wyngaard,N Videla,C Picone,L Zamuner,E Maceira,N
author_facet	Wyngaard,N Videla,C Picone,L Zamuner,E Maceira,N
author_sort	Wyngaard,N
title	Nitrogen dynamics in a feedlot soil
title_short	Nitrogen dynamics in a feedlot soil
title_full	Nitrogen dynamics in a feedlot soil
title_fullStr	Nitrogen dynamics in a feedlot soil
title_full_unstemmed	Nitrogen dynamics in a feedlot soil
title_sort	nitrogen dynamics in a feedlot soil
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162012000300016
work_keys_str_mv	AT wyngaardn nitrogendynamicsinafeedlotsoil AT videlac nitrogendynamicsinafeedlotsoil AT piconel nitrogendynamicsinafeedlotsoil AT zamunere nitrogendynamicsinafeedlotsoil AT maceiran nitrogendynamicsinafeedlotsoil
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Nitrogen dynamics in a feedlot soil

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