Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/5543 |
Resumo: | The knowledge of P dynamics in grassland ecosystems may be important to prescription of changes caused by the addition of different sources of phosphate fertilizers in the P forms of soil, dry matter production and botanical composition of natural grasslands. The objective of this work was to evaluate the dynamics of P (a) the availability and forms of P; (b) total dry matter and contributions in dry matter and (c) dilution curves of P content from tissue of main species of natural grasslands after the application of different phosphate sources in three soil types under natural grasslands with or without historical of P applications. Treatments were P applications as Gafsa rock phosphate, simple superphosphate, triple superphosphate and control, arranged in randomized blocks with three replicates. In two experiments located in the city of Candiota - RS (Ultisol and Entisol), 100 kg ha-1 P2O5 were applied in September 2010. In the experiment of Santa Maria - RS (Alfisol), 180, 90, 100 e 100 kg ha-1 P2O5 were applied in 1997, 1998, 2002 and 2010, respectively, which represent 470 kg ha-1 P2O5. The soil samples (0-10 cm) and herbage mass were evaluated in the spring and summer after applied the last treatment in each experiment. The Gafsa rock phosphate showed a potential to increase P availability in soils with low calcium content in natural grasslands, but increases were higher when superphosphate was used. The application of phosphate fertilizers in soils under grasslands increases the importance of inorganic fractions of labile P to the available P to plants, making them less dependent on the mineralization of organic fractions. The P fertilization response was higher where annual species occurrence prevailed. In pastures with historical of fertilization, contribution of main species to the total dry mass of pasture had changed. In Candiota city, species did not grow by a severe drought. In Santa Maria, species as Paspalum notatum, Aristida laevis and other plants aggregated as Other Species had increased biomass and P tissue content was diluted over the periods. The specie Eustachys ulignosa had responded in biomass to soluble phosphate additions. The evaluated phosphates sources did not alter the N content in the tissue of grassland species. |
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Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfatoPhosphorus dynamics in natural grassland ecosystem submitted to application of phosphate sourcesEspécies campestresFertilização fosfatadaFormas de fósforoMassa seca de forragemDiluição do P no tecidoGrassland speciesPhosphorus fertilizationPhosphorus formsHerbage dry matterDilution of tissue PCNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLOThe knowledge of P dynamics in grassland ecosystems may be important to prescription of changes caused by the addition of different sources of phosphate fertilizers in the P forms of soil, dry matter production and botanical composition of natural grasslands. The objective of this work was to evaluate the dynamics of P (a) the availability and forms of P; (b) total dry matter and contributions in dry matter and (c) dilution curves of P content from tissue of main species of natural grasslands after the application of different phosphate sources in three soil types under natural grasslands with or without historical of P applications. Treatments were P applications as Gafsa rock phosphate, simple superphosphate, triple superphosphate and control, arranged in randomized blocks with three replicates. In two experiments located in the city of Candiota - RS (Ultisol and Entisol), 100 kg ha-1 P2O5 were applied in September 2010. In the experiment of Santa Maria - RS (Alfisol), 180, 90, 100 e 100 kg ha-1 P2O5 were applied in 1997, 1998, 2002 and 2010, respectively, which represent 470 kg ha-1 P2O5. The soil samples (0-10 cm) and herbage mass were evaluated in the spring and summer after applied the last treatment in each experiment. The Gafsa rock phosphate showed a potential to increase P availability in soils with low calcium content in natural grasslands, but increases were higher when superphosphate was used. The application of phosphate fertilizers in soils under grasslands increases the importance of inorganic fractions of labile P to the available P to plants, making them less dependent on the mineralization of organic fractions. The P fertilization response was higher where annual species occurrence prevailed. In pastures with historical of fertilization, contribution of main species to the total dry mass of pasture had changed. In Candiota city, species did not grow by a severe drought. In Santa Maria, species as Paspalum notatum, Aristida laevis and other plants aggregated as Other Species had increased biomass and P tissue content was diluted over the periods. The specie Eustachys ulignosa had responded in biomass to soluble phosphate additions. The evaluated phosphates sources did not alter the N content in the tissue of grassland species.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorO conhecimento da dinâmica do fósforo nos ecossistemas campestres pode ser importante para a prescrição das alterações provocadas pela adição de diferentes fontes de fertilizantes fosfatados sobre as formas de P no solo, na produção de matéria seca e na composição botânica das pastagens naturais. O objetivo do presente trabalho foi avaliar a influência da dinâmica do P (a) na disponibilidade e formas de P no solo; (b) na massa total de forragem e as contribuições de massa seca e (c) curvas de diluição de P no tecido das principais espécies componentes das pastagens naturais submetidas à aplicação de diferentes fontes de fosfato em três solos com e sem histórico de fertilização fosfatada. Os tratamentos consistiram na aplicação de P nas formas de hiperfostado de Gafsa, superfosfato simples, superfosfato triplo e testemunha, arranjados em blocos casualizados com três repetições. Nos dois experimentos instalados em Candiota (Luvissolo Úmbrico e Neossolo Litólico), foram aplicados 100 kg ha-1 P2O5 em setembro de 2010. No experimento de Santa Maria (Argissolo Vermelho) foram aplicados 180, 90, 100 e 100 kg ha-1 P2O5 nos anos de 1997, 1998, 2002 e 2010, respectivamente, totalizando 470 kg ha-1 de P2O5. As coletas de solo (camada 0-10 cm) e as massas de forragem foram avaliadas no período primavera-verão, após a última aplicação dos tratamentos em cada experimento. O hiperfosfato de Gafsa demonstrou ter potencial de disponibilização de P em solos ácidos com baixo teor de cálcio sob pastagens naturais, mas a disponibilização de P obtida com os superfosfatos foi maior. A aplicação de fertilizantes fosfatados em solos pobres sob pastagens naturais aumenta a importância das frações inorgânicas lábeis de P na disponibilização de P para as plantas, tornando-as menos dependentes da mineralização das frações orgânicas. A resposta da pastagem natural à fertilização fosfatada foi maior onde havia significativa contribuição de espécies anuais. O histórico de adição de fertilizantes fosfatados solúveis alterou a contribuição das principais espécies na massa seca total das pastagens naturais. Em Candiota, as espécies não apresentaram crescimento em função de forte estiagem. Em Santa Maria, as espécies Paspalum notatum, Aristida laevis e o componente Outras Espécies aumentaram a biomassa aérea e diluíram P do tecido ao longo dos períodos avaliados. A espécie Eustachys ulignosa respondeu a adição de fosfato solúvel. As fontes de fosfatos avaliados não alteraram o teor de N no tecido das plantas.Universidade Federal de Santa MariaBRAgronomiaUFSMPrograma de Pós-Graduação em Ciência do SoloSantos, Danilo Rheinheimer doshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785480Z6Quadros, Fernando Luiz Ferreira dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780560Z8Trindade, José Pedro Pereirahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4768375Y0Oliveira, Leandro Bittencourt de2017-07-042017-07-042012-01-09info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfOLIVEIRA, Leandro Bittencourt de. Phosphorus dynamics in natural grassland ecosystem submitted to application of phosphate sources. 2012. 86 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2012.http://repositorio.ufsm.br/handle/1/5543porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-07-04T14:55:12Zoai:repositorio.ufsm.br:1/5543Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-07-04T14:55:12Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato Phosphorus dynamics in natural grassland ecosystem submitted to application of phosphate sources |
title |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato |
spellingShingle |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato Oliveira, Leandro Bittencourt de Espécies campestres Fertilização fosfatada Formas de fósforo Massa seca de forragem Diluição do P no tecido Grassland species Phosphorus fertilization Phosphorus forms Herbage dry matter Dilution of tissue P CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
title_short |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato |
title_full |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato |
title_fullStr |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato |
title_full_unstemmed |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato |
title_sort |
Dinâmica do fósforo em ecossistema de pastagem natural submetido à aplicação de fontes de fosfato |
author |
Oliveira, Leandro Bittencourt de |
author_facet |
Oliveira, Leandro Bittencourt de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Santos, Danilo Rheinheimer dos http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4785480Z6 Quadros, Fernando Luiz Ferreira de http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780560Z8 Trindade, José Pedro Pereira http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4768375Y0 |
dc.contributor.author.fl_str_mv |
Oliveira, Leandro Bittencourt de |
dc.subject.por.fl_str_mv |
Espécies campestres Fertilização fosfatada Formas de fósforo Massa seca de forragem Diluição do P no tecido Grassland species Phosphorus fertilization Phosphorus forms Herbage dry matter Dilution of tissue P CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
topic |
Espécies campestres Fertilização fosfatada Formas de fósforo Massa seca de forragem Diluição do P no tecido Grassland species Phosphorus fertilization Phosphorus forms Herbage dry matter Dilution of tissue P CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO |
description |
The knowledge of P dynamics in grassland ecosystems may be important to prescription of changes caused by the addition of different sources of phosphate fertilizers in the P forms of soil, dry matter production and botanical composition of natural grasslands. The objective of this work was to evaluate the dynamics of P (a) the availability and forms of P; (b) total dry matter and contributions in dry matter and (c) dilution curves of P content from tissue of main species of natural grasslands after the application of different phosphate sources in three soil types under natural grasslands with or without historical of P applications. Treatments were P applications as Gafsa rock phosphate, simple superphosphate, triple superphosphate and control, arranged in randomized blocks with three replicates. In two experiments located in the city of Candiota - RS (Ultisol and Entisol), 100 kg ha-1 P2O5 were applied in September 2010. In the experiment of Santa Maria - RS (Alfisol), 180, 90, 100 e 100 kg ha-1 P2O5 were applied in 1997, 1998, 2002 and 2010, respectively, which represent 470 kg ha-1 P2O5. The soil samples (0-10 cm) and herbage mass were evaluated in the spring and summer after applied the last treatment in each experiment. The Gafsa rock phosphate showed a potential to increase P availability in soils with low calcium content in natural grasslands, but increases were higher when superphosphate was used. The application of phosphate fertilizers in soils under grasslands increases the importance of inorganic fractions of labile P to the available P to plants, making them less dependent on the mineralization of organic fractions. The P fertilization response was higher where annual species occurrence prevailed. In pastures with historical of fertilization, contribution of main species to the total dry mass of pasture had changed. In Candiota city, species did not grow by a severe drought. In Santa Maria, species as Paspalum notatum, Aristida laevis and other plants aggregated as Other Species had increased biomass and P tissue content was diluted over the periods. The specie Eustachys ulignosa had responded in biomass to soluble phosphate additions. The evaluated phosphates sources did not alter the N content in the tissue of grassland species. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01-09 2017-07-04 2017-07-04 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
OLIVEIRA, Leandro Bittencourt de. Phosphorus dynamics in natural grassland ecosystem submitted to application of phosphate sources. 2012. 86 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/5543 |
identifier_str_mv |
OLIVEIRA, Leandro Bittencourt de. Phosphorus dynamics in natural grassland ecosystem submitted to application of phosphate sources. 2012. 86 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2012. |
url |
http://repositorio.ufsm.br/handle/1/5543 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Agronomia UFSM Programa de Pós-Graduação em Ciência do Solo |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Agronomia UFSM Programa de Pós-Graduação em Ciência do Solo |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922144273563648 |