Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol

Nitrogen fertilization influences plant growth and rhizospheric properties, affecting the functionality and persistence of arbuscular mycorrhizal fungi (AMF). In order to analyze the effect of two N-sources (NH4+ and NO3-) on the persistence of AMF propagules (colonized root, mycelium and spores) an...

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Autores principales:	Cornejo,Pablo, Rubio,Rosa, Borie,Fernando
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2008
Materias:	acidic soils available P wheat cultivars nitrogen fertilization rhizospheric pH
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000200001
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spelling	oai:scielo:S0718-583920080002000012018-10-01Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an AndisolCornejo,PabloRubio,RosaBorie,Fernando acidic soils available P wheat cultivars nitrogen fertilization rhizospheric pH Nitrogen fertilization influences plant growth and rhizospheric properties, affecting the functionality and persistence of arbuscular mycorrhizal fungi (AMF). In order to analyze the effect of two N-sources (NH4+ and NO3-) on the persistence of AMF propagules (colonized root, mycelium and spores) and some rhizospheric parameters (pH, P available), a greenhouse experiment was carried out using two wheat (Triticum aestivum L.) cvs. Otto and Metrenco, which were grown in an Andisol. Plant biomass was determined at the dry grain stage (Zadocks 99, 150 days after sowing, DAS), the density of AMF propagules was determined three months later (240 DAS), and pH and available P were determined at both stages. The results showed that N-source and cultivar influenced most of the studied variables. The NO3- + Metrenco combination showed the highest values for biomass, pH, available P and AMF spores (150, 13, 5 and 375% more than NH4+ + Otto interaction, respectively; p < 0.001). On the other hand, close relationships were found between biomass production and density of AMF spores (r² = 0.89; p < 0.001), suggesting that this propagule is quantitatively affected by host plant biomass production. This propagule is probably also indirectly affected by rhizospheric conditions. This result is of a special agronomic and ecological interest in acidic soils destined to annual crops, in which nitrogen fertilization is a habitual practice, being the N-source very influential in yields.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.68 n.2 20082008-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000200001en10.4067/S0718-58392008000200001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	acidic soils available P wheat cultivars nitrogen fertilization rhizospheric pH
spellingShingle	acidic soils available P wheat cultivars nitrogen fertilization rhizospheric pH Cornejo,Pablo Rubio,Rosa Borie,Fernando Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol
description	Nitrogen fertilization influences plant growth and rhizospheric properties, affecting the functionality and persistence of arbuscular mycorrhizal fungi (AMF). In order to analyze the effect of two N-sources (NH4+ and NO3-) on the persistence of AMF propagules (colonized root, mycelium and spores) and some rhizospheric parameters (pH, P available), a greenhouse experiment was carried out using two wheat (Triticum aestivum L.) cvs. Otto and Metrenco, which were grown in an Andisol. Plant biomass was determined at the dry grain stage (Zadocks 99, 150 days after sowing, DAS), the density of AMF propagules was determined three months later (240 DAS), and pH and available P were determined at both stages. The results showed that N-source and cultivar influenced most of the studied variables. The NO3- + Metrenco combination showed the highest values for biomass, pH, available P and AMF spores (150, 13, 5 and 375% more than NH4+ + Otto interaction, respectively; p < 0.001). On the other hand, close relationships were found between biomass production and density of AMF spores (r² = 0.89; p < 0.001), suggesting that this propagule is quantitatively affected by host plant biomass production. This propagule is probably also indirectly affected by rhizospheric conditions. This result is of a special agronomic and ecological interest in acidic soils destined to annual crops, in which nitrogen fertilization is a habitual practice, being the N-source very influential in yields.
author	Cornejo,Pablo Rubio,Rosa Borie,Fernando
author_facet	Cornejo,Pablo Rubio,Rosa Borie,Fernando
author_sort	Cornejo,Pablo
title	Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol
title_short	Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol
title_full	Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol
title_fullStr	Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol
title_full_unstemmed	Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol
title_sort	effect of nitrogen source on some rhizospheric properties and persistence of my corrhizal fungal propagules in an andisol
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000200001
work_keys_str_mv	AT cornejopablo effectofnitrogensourceonsomerhizosphericpropertiesandpersistenceofmycorrhizalfungalpropagulesinanandisol AT rubiorosa effectofnitrogensourceonsomerhizosphericpropertiesandpersistenceofmycorrhizalfungalpropagulesinanandisol AT boriefernando effectofnitrogensourceonsomerhizosphericpropertiesandpersistenceofmycorrhizalfungalpropagulesinanandisol
_version_	1714205259411226624

Effect of Nitrogen Source on Some Rhizospheric Properties and Persistence of my Corrhizal Fungal Propagules in an Andisol

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