Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products

ABSTRACT In thermoelectric industry, synthetic gypsum and coal ash are generated as industrial by-products. The objective of this work was to evaluate the effect of different mixtures of synthetic gypsum and coal ash on N mineralization in an Alfisol. Nitrogen mineralization was evaluated by soil in...

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Autores principales:	Fernández,Claudio, Stolpe,Neal, Celis,José E., Sandoval,Marco A.
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2017
Materias:	Coal ash FGD gypsum N mineralization soil amendment.
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400400
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spelling	oai:scielo:S0718-583920170004004002018-01-30Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-productsFernández,ClaudioStolpe,NealCelis,José E.Sandoval,Marco A. Coal ash FGD gypsum N mineralization soil amendment. ABSTRACT In thermoelectric industry, synthetic gypsum and coal ash are generated as industrial by-products. The objective of this work was to evaluate the effect of different mixtures of synthetic gypsum and coal ash on N mineralization in an Alfisol. Nitrogen mineralization was evaluated by soil incubations under controlled conditions and potential mineralization using the nonlinear first order kinetics model Nmt = N0 [1 - ℮(-k t )] , where Nmt is the mineral N accumulated at a specific time, N0 is the potentially mineralizable N, k is the mineralization rate, and finally t is the incubation time. Treatments consisted of different mixtures of synthetic gypsum, coal ash and urea (M1: 50% synthetic gypsum, 50% coal ash, M2: 50% synthetic gypsum, 35% coal ash, 15% urea, M3: 45% synthetic gypsum; 40% coal ash, 15% urea, M4: 65% synthetic gypsum, 20% coal ash, 15% urea, M5: 55% synthetic gypsum, 30% coal ash, 15% urea). Each mixture was applied to the soil at 2 t ha-1. The results shown the highest concentration (p < 0.05) of net mineral N (NMN) applying M3 (166.14 mg kg-1), while the lowest NMN (p < 0.05) was found applying M5 (98.30 mg kg-1). Treatment M1 presented the highest N0 value (579.0 mg kg-1) respect to treatments with urea in its composition, with exception of M3 (523.4 mg kg-1). Where the highest and lowest k were determined in M5 (k = 0.44990) and M3 (k = 0.04470), respectively. Mixtures of synthetic gypsum, coal ash and urea increased N mineralization over mixtures without urea. Respect N potential mineralization, in some cases N0 and k values would respond more to the fit of the mathematical model employed than to the biological process.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.77 n.4 20172017-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400400en10.4067/S0718-58392017000400400
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Coal ash FGD gypsum N mineralization soil amendment.
spellingShingle	Coal ash FGD gypsum N mineralization soil amendment. Fernández,Claudio Stolpe,Neal Celis,José E. Sandoval,Marco A. Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products
description	ABSTRACT In thermoelectric industry, synthetic gypsum and coal ash are generated as industrial by-products. The objective of this work was to evaluate the effect of different mixtures of synthetic gypsum and coal ash on N mineralization in an Alfisol. Nitrogen mineralization was evaluated by soil incubations under controlled conditions and potential mineralization using the nonlinear first order kinetics model Nmt = N0 [1 - ℮(-k t )] , where Nmt is the mineral N accumulated at a specific time, N0 is the potentially mineralizable N, k is the mineralization rate, and finally t is the incubation time. Treatments consisted of different mixtures of synthetic gypsum, coal ash and urea (M1: 50% synthetic gypsum, 50% coal ash, M2: 50% synthetic gypsum, 35% coal ash, 15% urea, M3: 45% synthetic gypsum; 40% coal ash, 15% urea, M4: 65% synthetic gypsum, 20% coal ash, 15% urea, M5: 55% synthetic gypsum, 30% coal ash, 15% urea). Each mixture was applied to the soil at 2 t ha-1. The results shown the highest concentration (p < 0.05) of net mineral N (NMN) applying M3 (166.14 mg kg-1), while the lowest NMN (p < 0.05) was found applying M5 (98.30 mg kg-1). Treatment M1 presented the highest N0 value (579.0 mg kg-1) respect to treatments with urea in its composition, with exception of M3 (523.4 mg kg-1). Where the highest and lowest k were determined in M5 (k = 0.44990) and M3 (k = 0.04470), respectively. Mixtures of synthetic gypsum, coal ash and urea increased N mineralization over mixtures without urea. Respect N potential mineralization, in some cases N0 and k values would respond more to the fit of the mathematical model employed than to the biological process.
author	Fernández,Claudio Stolpe,Neal Celis,José E. Sandoval,Marco A.
author_facet	Fernández,Claudio Stolpe,Neal Celis,José E. Sandoval,Marco A.
author_sort	Fernández,Claudio
title	Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products
title_short	Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products
title_full	Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products
title_fullStr	Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products
title_full_unstemmed	Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products
title_sort	nitrogen mineralization in an alfisol amended with thermoelectrical industry by-products
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392017000400400
work_keys_str_mv	AT fernandezclaudio nitrogenmineralizationinanalfisolamendedwiththermoelectricalindustrybyproducts AT stolpeneal nitrogenmineralizationinanalfisolamendedwiththermoelectricalindustrybyproducts AT celisjosee nitrogenmineralizationinanalfisolamendedwiththermoelectricalindustrybyproducts AT sandovalmarcoa nitrogenmineralizationinanalfisolamendedwiththermoelectricalindustrybyproducts
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Nitrogen mineralization in an Alfisol amended with thermoelectrical industry by-products

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