Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization

Abstract: The objectives of this study were i) to measure the nitrogen (N) mineralization potential; ii) to evaluate N mineralization indices and labile soil organic matter (SOM) fractions, and iii) to analyze their interrelationship with soil properties for predicting the potential N mineralization...

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Autores principales:	Martínez,Juan Manuel, Galantini,Juan Alberto, Duval,Matias Ezequiel
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2018
Materias:	Potentially mineralizable N Soil organic matter Principal component analysis Mollisols
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000100073
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spelling	oai:scielo:S0718-951620180001000732018-11-21Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralizationMartínez,Juan ManuelGalantini,Juan AlbertoDuval,Matias Ezequiel Potentially mineralizable N Soil organic matter Principal component analysis Mollisols Abstract: The objectives of this study were i) to measure the nitrogen (N) mineralization potential; ii) to evaluate N mineralization indices and labile soil organic matter (SOM) fractions, and iii) to analyze their interrelationship with soil properties for predicting the potential N mineralization in Mollisols under no-tillage of the Argentine Pampas. Potential N mineralization pool was determined by aerobic incubation of soil samples from 0-20 cm depth at 25°C for six drying and rewetting cycles over 21-24 weeks. The data were fitted to a first-order exponential equation to determine the potentially mineralizable N at a variable (N0) and at a fixed constant rate (N0kf). Several N mineralization indices, labile organic fractions and soil properties were determined. A broad range of values were found for N0 (29.9-220.7 mg kg-1) and N0kf (26.9-172.4 mg kg-1). A close relationship (P<0.001) was found between N0 and N0kf with a high coefficient of determination (R2=0.94). High R2 values were found for predicting N0 and N0kf using the principal component as regress variable. Total and labile organic fractions and sand content, explained the majority of the variance. No single N mineralization index, labile organic fraction or soil property can accurately predict the potential N mineralization at a variable and at a fixed constant rate. The potential N mineralization pool may be controlled mainly by the variables related to the size of SOM and some labile fractions, i.e. soil organic C (SOC) and N (SON), soluble carbohydrates (CHs) and fine particulate organic N (fPOM-N) in these Mollisols.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.18 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000100073en10.4067/S0718-95162018005000401
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Potentially mineralizable N Soil organic matter Principal component analysis Mollisols
spellingShingle	Potentially mineralizable N Soil organic matter Principal component analysis Mollisols Martínez,Juan Manuel Galantini,Juan Alberto Duval,Matias Ezequiel Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
description	Abstract: The objectives of this study were i) to measure the nitrogen (N) mineralization potential; ii) to evaluate N mineralization indices and labile soil organic matter (SOM) fractions, and iii) to analyze their interrelationship with soil properties for predicting the potential N mineralization in Mollisols under no-tillage of the Argentine Pampas. Potential N mineralization pool was determined by aerobic incubation of soil samples from 0-20 cm depth at 25°C for six drying and rewetting cycles over 21-24 weeks. The data were fitted to a first-order exponential equation to determine the potentially mineralizable N at a variable (N0) and at a fixed constant rate (N0kf). Several N mineralization indices, labile organic fractions and soil properties were determined. A broad range of values were found for N0 (29.9-220.7 mg kg-1) and N0kf (26.9-172.4 mg kg-1). A close relationship (P<0.001) was found between N0 and N0kf with a high coefficient of determination (R2=0.94). High R2 values were found for predicting N0 and N0kf using the principal component as regress variable. Total and labile organic fractions and sand content, explained the majority of the variance. No single N mineralization index, labile organic fraction or soil property can accurately predict the potential N mineralization at a variable and at a fixed constant rate. The potential N mineralization pool may be controlled mainly by the variables related to the size of SOM and some labile fractions, i.e. soil organic C (SOC) and N (SON), soluble carbohydrates (CHs) and fine particulate organic N (fPOM-N) in these Mollisols.
author	Martínez,Juan Manuel Galantini,Juan Alberto Duval,Matias Ezequiel
author_facet	Martínez,Juan Manuel Galantini,Juan Alberto Duval,Matias Ezequiel
author_sort	Martínez,Juan Manuel
title	Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
title_short	Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
title_full	Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
title_fullStr	Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
title_full_unstemmed	Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
title_sort	contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162018000100073
work_keys_str_mv	AT martinezjuanmanuel contributionofnitrogenmineralizationindiceslabileorganicmatterandsoilpropertiesinpredictingnitrogenmineralization AT galantinijuanalberto contributionofnitrogenmineralizationindiceslabileorganicmatterandsoilpropertiesinpredictingnitrogenmineralization AT duvalmatiasezequiel contributionofnitrogenmineralizationindiceslabileorganicmatterandsoilpropertiesinpredictingnitrogenmineralization
_version_	1714206570396516352

Contribution of nitrogen mineralization indices, labile organic matter and soil properties in predicting nitrogen mineralization

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