P adsorption and desorption capacities of selected Andisols from the Azores, Portugal

Detalhes bibliográficos
Autor(a) principal: Auxtero, E.
Data de Publicação: 2018
Outros Autores: Madeira, M., Sousa, E.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://doi.org/10.19084/rca.15463
Resumo: Phosphorous adsorption maxima (P-ads max) and the amounts of P desorbed (P-des) using Langmuir equation and eight successive extractions with 0.01M CaCl2, were determined on sixteen horizons of Andisols from the Azores, Portugal. Results showed that the values of P-ads max and the proportions of P desorbed (P-des) were highly influenced by allophane, Alo, Ald, and Fed contents, and by the values of Alo + ½ Feo and ferrihydrite + allophane. P-des were negatively correlated with these constituents, but not with allophane. Vitrandic Haplustepts and Typic Udivitrands, and Typic Hapludands containing low amounts of allophane, Alo, Ald, and Fed showed low values of P-ads max, but high P-des values. Phosphate ions applied as fertilizer on these soils are highly available for plant use, but maybe easily lost through surface runoff, subsurface drainage and soil erosion. They may require restricted amounts of P fertilizer, and P losses should be controlled to minimize eutrophication of nearby water bodies. Conversely, Typic Placudands containing large amounts of allophane, and Acrudoxic Hydrudands and Typic Hapludands containing large amounts of organic C showed high values of P-ads max, but low P-des, indicating unavailability of P when retained by these soils. Large amounts of slow P-releasing fertilizer may be required for better crop use.
id RCAP_cc37b0084338d4c36a0a74cd4b2344a9
oai_identifier_str oai:ojs.revistas.rcaap.pt:article/15463
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling P adsorption and desorption capacities of selected Andisols from the Azores, PortugalCapacidade de adsorção e de desorção de P em Andossolos dos Açores, PortugalGeralPhosphorous adsorption maxima (P-ads max) and the amounts of P desorbed (P-des) using Langmuir equation and eight successive extractions with 0.01M CaCl2, were determined on sixteen horizons of Andisols from the Azores, Portugal. Results showed that the values of P-ads max and the proportions of P desorbed (P-des) were highly influenced by allophane, Alo, Ald, and Fed contents, and by the values of Alo + ½ Feo and ferrihydrite + allophane. P-des were negatively correlated with these constituents, but not with allophane. Vitrandic Haplustepts and Typic Udivitrands, and Typic Hapludands containing low amounts of allophane, Alo, Ald, and Fed showed low values of P-ads max, but high P-des values. Phosphate ions applied as fertilizer on these soils are highly available for plant use, but maybe easily lost through surface runoff, subsurface drainage and soil erosion. They may require restricted amounts of P fertilizer, and P losses should be controlled to minimize eutrophication of nearby water bodies. Conversely, Typic Placudands containing large amounts of allophane, and Acrudoxic Hydrudands and Typic Hapludands containing large amounts of organic C showed high values of P-ads max, but low P-des, indicating unavailability of P when retained by these soils. Large amounts of slow P-releasing fertilizer may be required for better crop use.A adsorção máxima de P (P-ads max) e a quantidade de P desorvido no solo (P-des), foram determinadas em 16 horizontes superficiais e subsuperficiais de Andossolos dos Açores, Portugal, usando equação de Langmuir e oito extracções sucessivas com cloreto do cálcio. Os valores de P-ads max mostraram uma correlação positiva com os teores de Alo, Ald, Fed, alofana, ferihidrite + + alofana, e com valores de Alo + ½ Feo. Por outro lado, os resultados de P-des, mostraram uma correlação negativa com os mesmos constituintes, excepto com alofana. Vitrandic Haplustepts, Typic Udivitrands e Typic Hapludands mostraram um valor de P-ads max baixo, mas com elevado teor de P-des. Iões fosfato adicionados como fertilizante neste tipo de solos ficam disponíveis para utilização pelas plantas, mas provavelmente, serão facilmente perdidos por drenagem e erosão do solo. Estes solos podem necessitar de quantidades limitadas de fertilizante de fósforo, com controlo das perdas deste elemento para minimizar a eutroficação dos cursos de água das proximidades. Por outro lado, os Typic Placudands com elevado teor de alofana e os Acrudoxic Hydrudands, com elevado teor de carbono orgânico, têm elevado valor de P-ads max e baixo teor de P-des, indicando indisponibilidade do P quando retido por estes solos. Neste caso, poderá ser preferível o uso de grandes quantidades de fertilizante de libertação lenta de P.Sociedade de Ciências Agrárias de Portugal2018-11-12T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://doi.org/10.19084/rca.15463eng2183-041X0871-018XAuxtero, E.Madeira, M.Sousa, E.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T09:23:40Zoai:ojs.revistas.rcaap.pt:article/15463Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:30:29.699781Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
Capacidade de adsorção e de desorção de P em Andossolos dos Açores, Portugal
title P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
spellingShingle P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
Auxtero, E.
Geral
title_short P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
title_full P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
title_fullStr P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
title_full_unstemmed P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
title_sort P adsorption and desorption capacities of selected Andisols from the Azores, Portugal
author Auxtero, E.
author_facet Auxtero, E.
Madeira, M.
Sousa, E.
author_role author
author2 Madeira, M.
Sousa, E.
author2_role author
author
dc.contributor.author.fl_str_mv Auxtero, E.
Madeira, M.
Sousa, E.
dc.subject.por.fl_str_mv Geral
topic Geral
description Phosphorous adsorption maxima (P-ads max) and the amounts of P desorbed (P-des) using Langmuir equation and eight successive extractions with 0.01M CaCl2, were determined on sixteen horizons of Andisols from the Azores, Portugal. Results showed that the values of P-ads max and the proportions of P desorbed (P-des) were highly influenced by allophane, Alo, Ald, and Fed contents, and by the values of Alo + ½ Feo and ferrihydrite + allophane. P-des were negatively correlated with these constituents, but not with allophane. Vitrandic Haplustepts and Typic Udivitrands, and Typic Hapludands containing low amounts of allophane, Alo, Ald, and Fed showed low values of P-ads max, but high P-des values. Phosphate ions applied as fertilizer on these soils are highly available for plant use, but maybe easily lost through surface runoff, subsurface drainage and soil erosion. They may require restricted amounts of P fertilizer, and P losses should be controlled to minimize eutrophication of nearby water bodies. Conversely, Typic Placudands containing large amounts of allophane, and Acrudoxic Hydrudands and Typic Hapludands containing large amounts of organic C showed high values of P-ads max, but low P-des, indicating unavailability of P when retained by these soils. Large amounts of slow P-releasing fertilizer may be required for better crop use.
publishDate 2018
dc.date.none.fl_str_mv 2018-11-12T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://doi.org/10.19084/rca.15463
url https://doi.org/10.19084/rca.15463
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2183-041X
0871-018X
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799130171563835392