RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Caatinga |
Texto Completo: | https://periodicos.ufersa.edu.br/caatinga/article/view/5803 |
Resumo: | Some forages release allelopathic substances into the environment, and may prevent consortium with arboreal species in pastures. The objective of this work was to evaluate photosynthetic characteristics of pequizeiro plants (hereafter pequi) influenced by concentrations of residues of the forage species Urocholoa decumbens, Melinis minutiflora and Paspalum notatum. The treatments consisted of pequi cultivation under aerial residues of the three forage species mixed to the substrate in four concentrations (1, 2, 3 and 4% mass/mass), plus an additional treatment (comparative control) with pequi cultivated on the substrate without waste. The following parameters were evaluated: photosynthetic rate, stomatal conductance, transpiration rate, relationship between internal and external CO2 concentration (Ci/Ca), maximum quantum yield, effective quantum yield of FS II, electron transport rate, nonchemical quenching and chlorophyll index, concerning the content of chlorophyll a, b and total in pequi plants at 50 and 100 days after transplanting (DAT), and the relative production of dry matter at 100 DAT. At 50 DAT, the following photosynthetic variables were affected in pequi plants: A, gs, chlorophyll a, chlorophyll b and total chlorophyll when cultivated in the presence of forage residues. At 100 DAT, the following photosynthetic variables were affected in pequi plants: A, Fv/Fm, ETR, NPQ, chlorophyll a, chlorophyll b and total chlorophyll, when cultivated in the presence of forage residues. Pequi plants had reduced relative dry matter yield when grown in the presence of U. decumbens. This variable was also affected when pequi was grown in increasing concentrations of residues of the species U. decumbens, M. minutiflora and P. notatum. |
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RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRORESÍDUOS DE ESPÉCIES FORRAGEIRAS AFETAM CARACTERÍSTICAS FOTOSSINTÉTICAS DO PEQUIZEIROAllelopathy. Melinis minutiflora. Paspalum notatum. Photosynthetic rate. Urocholoa decumbens.Alelopatia. Melinis minutiflora. Paspalum notatum. Taxa fotossintética. Urocholoa decumbens.Some forages release allelopathic substances into the environment, and may prevent consortium with arboreal species in pastures. The objective of this work was to evaluate photosynthetic characteristics of pequizeiro plants (hereafter pequi) influenced by concentrations of residues of the forage species Urocholoa decumbens, Melinis minutiflora and Paspalum notatum. The treatments consisted of pequi cultivation under aerial residues of the three forage species mixed to the substrate in four concentrations (1, 2, 3 and 4% mass/mass), plus an additional treatment (comparative control) with pequi cultivated on the substrate without waste. The following parameters were evaluated: photosynthetic rate, stomatal conductance, transpiration rate, relationship between internal and external CO2 concentration (Ci/Ca), maximum quantum yield, effective quantum yield of FS II, electron transport rate, nonchemical quenching and chlorophyll index, concerning the content of chlorophyll a, b and total in pequi plants at 50 and 100 days after transplanting (DAT), and the relative production of dry matter at 100 DAT. At 50 DAT, the following photosynthetic variables were affected in pequi plants: A, gs, chlorophyll a, chlorophyll b and total chlorophyll when cultivated in the presence of forage residues. At 100 DAT, the following photosynthetic variables were affected in pequi plants: A, Fv/Fm, ETR, NPQ, chlorophyll a, chlorophyll b and total chlorophyll, when cultivated in the presence of forage residues. Pequi plants had reduced relative dry matter yield when grown in the presence of U. decumbens. This variable was also affected when pequi was grown in increasing concentrations of residues of the species U. decumbens, M. minutiflora and P. notatum.Algumas forrageias liberam no ambiente substancias alelopáticas, podendo inviabilizar o consórcio com espécies arbóreas em pastagens. O objetivo deste trabalho foi avaliar características fotossintéticas do pequizeiro influenciadas por concentrações de resíduos das espécies forrageiras Urocholoa decumbens, Melinis minutiflora e Paspalum notatum. Os tratamentos consistiram do cultivo de pequi sob resíduos da parte aérea das três espécies forrageiras misturadas ao substrato em quatro concentrações (1, 2, 3 e 4% massa/massa), mais um tratamento adicional (testemunha comparativa) com pequi cultivado no substrato sem resíduos. Foi avaliada a taxa fotossintética, condutância estomática, taxa transpiratória, relação entre a concentração interna e externa de CO2 (Ci/CA), rendimento quântico máximo, rendimento quântico efetivo do FS II, taxa de transporte de elétrons, quenching não fotoquímico e índice clorofilog referente ao conteúdo das clorofilas a, b e total em plantas de pequi aos 50 e 100 dias após o transplantio (DAT) e a produção relativa referente à matéria seca aos 100 DAT. Aos 50 DAT, as plantas de pequi foram afetadas quanto as variáveis fotossintéticas A, gs, clorofila a, clorofila b e clorofila total, quando cultivadas na presença de resíduos das forrageiras. Aos 100 DAT, as plantas de pequi foram afetadas quanto as variáveis fotossintéticas A, Fv/Fm, ETR, NPQ, clorofila a, clorofila b e clorofila total, quando cultivadas na presença de resíduos das forrageiras. O pequizeiro tem produção de matéria seca relativa reduzida quando cultivado na presença de resíduos da espécie U. decumbens. Essa variável também é afetada quando o pequi é cultivado em concentrações crescentes de resíduos das espécies U. decumbens, M. minutiflora e P. notatum.Universidade Federal Rural do Semi-Árido2017-12-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufersa.edu.br/caatinga/article/view/580310.1590/1983-21252018v31n102rcREVISTA CAATINGA; Vol. 31 No. 1 (2018); 9-18Revista Caatinga; v. 31 n. 1 (2018); 9-181983-21250100-316Xreponame:Revista Caatingainstname:Universidade Federal Rural do Semi-Árido (UFERSA)instacron:UFERSAenghttps://periodicos.ufersa.edu.br/caatinga/article/view/5803/pdfAraújo, Alana Cristina FerreiraMadalão, João CarlosJakelaitis, AdrianoCosta, Alan CarlosAlmeida, Gabriel Martinsinfo:eu-repo/semantics/openAccess2023-07-20T11:45:48Zoai:ojs.periodicos.ufersa.edu.br:article/5803Revistahttps://periodicos.ufersa.edu.br/index.php/caatinga/indexPUBhttps://periodicos.ufersa.edu.br/index.php/caatinga/oaipatricio@ufersa.edu.br|| caatinga@ufersa.edu.br1983-21250100-316Xopendoar:2024-04-29T09:46:24.900214Revista Caatinga - Universidade Federal Rural do Semi-Árido (UFERSA)true |
dc.title.none.fl_str_mv |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO RESÍDUOS DE ESPÉCIES FORRAGEIRAS AFETAM CARACTERÍSTICAS FOTOSSINTÉTICAS DO PEQUIZEIRO |
title |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO |
spellingShingle |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO Araújo, Alana Cristina Ferreira Allelopathy. Melinis minutiflora. Paspalum notatum. Photosynthetic rate. Urocholoa decumbens. Alelopatia. Melinis minutiflora. Paspalum notatum. Taxa fotossintética. Urocholoa decumbens. |
title_short |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO |
title_full |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO |
title_fullStr |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO |
title_full_unstemmed |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO |
title_sort |
RESIDUES OF FORAGE SPECIES AFFECT PHOTOSYNTHETIC CHARACTERISTICS OF THE PEQUIZEIRO |
author |
Araújo, Alana Cristina Ferreira |
author_facet |
Araújo, Alana Cristina Ferreira Madalão, João Carlos Jakelaitis, Adriano Costa, Alan Carlos Almeida, Gabriel Martins |
author_role |
author |
author2 |
Madalão, João Carlos Jakelaitis, Adriano Costa, Alan Carlos Almeida, Gabriel Martins |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Araújo, Alana Cristina Ferreira Madalão, João Carlos Jakelaitis, Adriano Costa, Alan Carlos Almeida, Gabriel Martins |
dc.subject.por.fl_str_mv |
Allelopathy. Melinis minutiflora. Paspalum notatum. Photosynthetic rate. Urocholoa decumbens. Alelopatia. Melinis minutiflora. Paspalum notatum. Taxa fotossintética. Urocholoa decumbens. |
topic |
Allelopathy. Melinis minutiflora. Paspalum notatum. Photosynthetic rate. Urocholoa decumbens. Alelopatia. Melinis minutiflora. Paspalum notatum. Taxa fotossintética. Urocholoa decumbens. |
description |
Some forages release allelopathic substances into the environment, and may prevent consortium with arboreal species in pastures. The objective of this work was to evaluate photosynthetic characteristics of pequizeiro plants (hereafter pequi) influenced by concentrations of residues of the forage species Urocholoa decumbens, Melinis minutiflora and Paspalum notatum. The treatments consisted of pequi cultivation under aerial residues of the three forage species mixed to the substrate in four concentrations (1, 2, 3 and 4% mass/mass), plus an additional treatment (comparative control) with pequi cultivated on the substrate without waste. The following parameters were evaluated: photosynthetic rate, stomatal conductance, transpiration rate, relationship between internal and external CO2 concentration (Ci/Ca), maximum quantum yield, effective quantum yield of FS II, electron transport rate, nonchemical quenching and chlorophyll index, concerning the content of chlorophyll a, b and total in pequi plants at 50 and 100 days after transplanting (DAT), and the relative production of dry matter at 100 DAT. At 50 DAT, the following photosynthetic variables were affected in pequi plants: A, gs, chlorophyll a, chlorophyll b and total chlorophyll when cultivated in the presence of forage residues. At 100 DAT, the following photosynthetic variables were affected in pequi plants: A, Fv/Fm, ETR, NPQ, chlorophyll a, chlorophyll b and total chlorophyll, when cultivated in the presence of forage residues. Pequi plants had reduced relative dry matter yield when grown in the presence of U. decumbens. This variable was also affected when pequi was grown in increasing concentrations of residues of the species U. decumbens, M. minutiflora and P. notatum. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12-11 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufersa.edu.br/caatinga/article/view/5803 10.1590/1983-21252018v31n102rc |
url |
https://periodicos.ufersa.edu.br/caatinga/article/view/5803 |
identifier_str_mv |
10.1590/1983-21252018v31n102rc |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://periodicos.ufersa.edu.br/caatinga/article/view/5803/pdf |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal Rural do Semi-Árido |
publisher.none.fl_str_mv |
Universidade Federal Rural do Semi-Árido |
dc.source.none.fl_str_mv |
REVISTA CAATINGA; Vol. 31 No. 1 (2018); 9-18 Revista Caatinga; v. 31 n. 1 (2018); 9-18 1983-2125 0100-316X reponame:Revista Caatinga instname:Universidade Federal Rural do Semi-Árido (UFERSA) instacron:UFERSA |
instname_str |
Universidade Federal Rural do Semi-Árido (UFERSA) |
instacron_str |
UFERSA |
institution |
UFERSA |
reponame_str |
Revista Caatinga |
collection |
Revista Caatinga |
repository.name.fl_str_mv |
Revista Caatinga - Universidade Federal Rural do Semi-Árido (UFERSA) |
repository.mail.fl_str_mv |
patricio@ufersa.edu.br|| caatinga@ufersa.edu.br |
_version_ |
1797674026099802112 |