Fertilizer effects on phosphorus fractions and organic matter in Andisols

Fertilizer effects on phosphorus fractions and organic matter in Andisols

Andisols are characterized by a high phosphorus (P) fixation capacity, which is a limiting factor for plant production. Continuous application of P fertilizer may result in an accumulation of P associated with soil organic matter (SOM), which further acts to reduce the availability of the added P. T...

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Autores principales: Velásquez,G, Calabi-Floody,M, Poblete-Grant,P, Rumpel,C, Demanet,R, Condron,L, Mora,M.L
Lenguaje:English
Publicado: Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2016
Materias:
Soil phosphorus fractionation
13C nuclear magnetic resonance
pyrolysis
phosphorus fertilizer
Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000200002
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spelling oai:scielo:S0718-951620160002000022016-10-24Fertilizer effects on phosphorus fractions and organic matter in AndisolsVelásquez,GCalabi-Floody,MPoblete-Grant,PRumpel,CDemanet,RCondron,LMora,M.L Soil phosphorus fractionation 13C nuclear magnetic resonance pyrolysis phosphorus fertilizer Andisols are characterized by a high phosphorus (P) fixation capacity, which is a limiting factor for plant production. Continuous application of P fertilizer may result in an accumulation of P associated with soil organic matter (SOM), which further acts to reduce the availability of the added P. The objectives of this study were (1) to evaluate the impact of P fertilizer inputs on the quantities and chemical forms of P, and (2) to investigate relationships between P forms SOM and land use. Topsoil (0-20 cm) and subsoil (20-40 cm) samples were taken from two Andisols series under grassland and arable cropping. Soil P forms were determined using sequential fractionation, while SOM analysis involved a combination of 13C nuclear magnetic resonance (NMR) spectroscopy and pyrolysis-GC-mass spectrometry. Fertilization increased total P, total organic P, organic carbon, and inorganic P fractions, mainly in arable soils. Labile P was higher in grassland (3% of total P) than in arable soils (1% of total P). A clear effect of fertilization was observed on organic matter compounds measured by pyrolysis in both soil depths. Interestingly, the polysaccharide-derived compounds increased in fertilized soils and lipid-derived compounds decreased. Thus fertilization principally affected labile P and labile SOM forms, whereas recalcitrant forms of P and SOM remained unchanged.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.16 n.2 20162016-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000200002en10.4067/S0718-95162016005000024
institution Scielo Chile
collection Scielo Chile
language English
topic Soil phosphorus fractionation
13C nuclear magnetic resonance
pyrolysis
phosphorus fertilizer
spellingShingle Soil phosphorus fractionation
13C nuclear magnetic resonance
pyrolysis
phosphorus fertilizer
Velásquez,G
Calabi-Floody,M
Poblete-Grant,P
Rumpel,C
Demanet,R
Condron,L
Mora,M.L
Fertilizer effects on phosphorus fractions and organic matter in Andisols
description Andisols are characterized by a high phosphorus (P) fixation capacity, which is a limiting factor for plant production. Continuous application of P fertilizer may result in an accumulation of P associated with soil organic matter (SOM), which further acts to reduce the availability of the added P. The objectives of this study were (1) to evaluate the impact of P fertilizer inputs on the quantities and chemical forms of P, and (2) to investigate relationships between P forms SOM and land use. Topsoil (0-20 cm) and subsoil (20-40 cm) samples were taken from two Andisols series under grassland and arable cropping. Soil P forms were determined using sequential fractionation, while SOM analysis involved a combination of 13C nuclear magnetic resonance (NMR) spectroscopy and pyrolysis-GC-mass spectrometry. Fertilization increased total P, total organic P, organic carbon, and inorganic P fractions, mainly in arable soils. Labile P was higher in grassland (3% of total P) than in arable soils (1% of total P). A clear effect of fertilization was observed on organic matter compounds measured by pyrolysis in both soil depths. Interestingly, the polysaccharide-derived compounds increased in fertilized soils and lipid-derived compounds decreased. Thus fertilization principally affected labile P and labile SOM forms, whereas recalcitrant forms of P and SOM remained unchanged.
author Velásquez,G
Calabi-Floody,M
Poblete-Grant,P
Rumpel,C
Demanet,R
Condron,L
Mora,M.L
author_facet Velásquez,G
Calabi-Floody,M
Poblete-Grant,P
Rumpel,C
Demanet,R
Condron,L
Mora,M.L
author_sort Velásquez,G
title Fertilizer effects on phosphorus fractions and organic matter in Andisols
title_short Fertilizer effects on phosphorus fractions and organic matter in Andisols
title_full Fertilizer effects on phosphorus fractions and organic matter in Andisols
title_fullStr Fertilizer effects on phosphorus fractions and organic matter in Andisols
title_full_unstemmed Fertilizer effects on phosphorus fractions and organic matter in Andisols
title_sort fertilizer effects on phosphorus fractions and organic matter in andisols
publisher Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate 2016
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000200002
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AT calabifloodym fertilizereffectsonphosphorusfractionsandorganicmatterinandisols
AT pobletegrantp fertilizereffectsonphosphorusfractionsandorganicmatterinandisols
AT rumpelc fertilizereffectsonphosphorusfractionsandorganicmatterinandisols
AT demanetr fertilizereffectsonphosphorusfractionsandorganicmatterinandisols
AT condronl fertilizereffectsonphosphorusfractionsandorganicmatterinandisols
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