Gaseous exchanges of corn and weeds under competition and water regimes

Detalhes bibliográficos
Autor(a) principal: Freitas,Claudia D. M.
Data de Publicação: 2020
Outros Autores: Pamplona,Juliana de P., Lins,Hamurábi A., Souza,Matheus de F., Dombroski,Jeferson L. D., Silva,Daniel V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Engenharia Agrícola e Ambiental (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000700465
Resumo: ABSTRACT Water deficits can alter vital physiological functions and negatively affect plant growth. These effects can be intensified by weeds competing for water available to crops. The objective of this study was to evaluate the effects of competition and temporary soil water deficit on the transpiration (E), stomatal conductance (gs) and photosynthetic rate (A) of corn, Urochloa decumbens, and Bidens pilosa L. The experimental design was in randomized blocks with eight repetitions. The treatments were arranged in a 5 x 2 factorial scheme, with the first factor corresponding to the species: corn + U. decumbens, corn + B. pilosa, and corn, U. decumbens, and B. pilosa without competition. The second factor was two water regimes: daily irrigation and water restriction, which corresponded to the suspension of irrigation from the beginning of the V3 stage of corn until the time when their stomata were completely closed. The species B. pilosa and U. decumbens worsened the negative effects on E, gs, and A of corn at different intensities under water restriction. The U. decumbens was more aggressive in relation to B. pilosa while coexisting with corn in both water regimes. The competition with corn affected the E and gs of U. decumbens in the two water regimes, but the A was altered under water deficit. On the other hand, the physiological components of B. pilosa were not affected by its coexistence with corn in the two water regimes.
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spelling Gaseous exchanges of corn and weeds under competition and water regimesZea mays L.Urochloa decumbensBidens pilosa L.ABSTRACT Water deficits can alter vital physiological functions and negatively affect plant growth. These effects can be intensified by weeds competing for water available to crops. The objective of this study was to evaluate the effects of competition and temporary soil water deficit on the transpiration (E), stomatal conductance (gs) and photosynthetic rate (A) of corn, Urochloa decumbens, and Bidens pilosa L. The experimental design was in randomized blocks with eight repetitions. The treatments were arranged in a 5 x 2 factorial scheme, with the first factor corresponding to the species: corn + U. decumbens, corn + B. pilosa, and corn, U. decumbens, and B. pilosa without competition. The second factor was two water regimes: daily irrigation and water restriction, which corresponded to the suspension of irrigation from the beginning of the V3 stage of corn until the time when their stomata were completely closed. The species B. pilosa and U. decumbens worsened the negative effects on E, gs, and A of corn at different intensities under water restriction. The U. decumbens was more aggressive in relation to B. pilosa while coexisting with corn in both water regimes. The competition with corn affected the E and gs of U. decumbens in the two water regimes, but the A was altered under water deficit. On the other hand, the physiological components of B. pilosa were not affected by its coexistence with corn in the two water regimes.Departamento de Engenharia Agrícola - UFCG2020-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000700465Revista Brasileira de Engenharia Agrícola e Ambiental v.24 n.7 2020reponame:Revista Brasileira de Engenharia Agrícola e Ambiental (Online)instname:Universidade Federal de Campina Grande (UFCG)instacron:UFCG10.1590/1807-1929/agriambi.v24n7p465-473info:eu-repo/semantics/openAccessFreitas,Claudia D. M.Pamplona,Juliana de P.Lins,Hamurábi A.Souza,Matheus de F.Dombroski,Jeferson L. D.Silva,Daniel V.eng2020-07-10T00:00:00Zoai:scielo:S1415-43662020000700465Revistahttp://www.scielo.br/rbeaaPUBhttps://old.scielo.br/oai/scielo-oai.php||agriambi@agriambi.com.br1807-19291415-4366opendoar:2020-07-10T00:00Revista Brasileira de Engenharia Agrícola e Ambiental (Online) - Universidade Federal de Campina Grande (UFCG)false
dc.title.none.fl_str_mv Gaseous exchanges of corn and weeds under competition and water regimes
title Gaseous exchanges of corn and weeds under competition and water regimes
spellingShingle Gaseous exchanges of corn and weeds under competition and water regimes
Freitas,Claudia D. M.
Zea mays L.
Urochloa decumbens
Bidens pilosa L.
title_short Gaseous exchanges of corn and weeds under competition and water regimes
title_full Gaseous exchanges of corn and weeds under competition and water regimes
title_fullStr Gaseous exchanges of corn and weeds under competition and water regimes
title_full_unstemmed Gaseous exchanges of corn and weeds under competition and water regimes
title_sort Gaseous exchanges of corn and weeds under competition and water regimes
author Freitas,Claudia D. M.
author_facet Freitas,Claudia D. M.
Pamplona,Juliana de P.
Lins,Hamurábi A.
Souza,Matheus de F.
Dombroski,Jeferson L. D.
Silva,Daniel V.
author_role author
author2 Pamplona,Juliana de P.
Lins,Hamurábi A.
Souza,Matheus de F.
Dombroski,Jeferson L. D.
Silva,Daniel V.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Freitas,Claudia D. M.
Pamplona,Juliana de P.
Lins,Hamurábi A.
Souza,Matheus de F.
Dombroski,Jeferson L. D.
Silva,Daniel V.
dc.subject.por.fl_str_mv Zea mays L.
Urochloa decumbens
Bidens pilosa L.
topic Zea mays L.
Urochloa decumbens
Bidens pilosa L.
description ABSTRACT Water deficits can alter vital physiological functions and negatively affect plant growth. These effects can be intensified by weeds competing for water available to crops. The objective of this study was to evaluate the effects of competition and temporary soil water deficit on the transpiration (E), stomatal conductance (gs) and photosynthetic rate (A) of corn, Urochloa decumbens, and Bidens pilosa L. The experimental design was in randomized blocks with eight repetitions. The treatments were arranged in a 5 x 2 factorial scheme, with the first factor corresponding to the species: corn + U. decumbens, corn + B. pilosa, and corn, U. decumbens, and B. pilosa without competition. The second factor was two water regimes: daily irrigation and water restriction, which corresponded to the suspension of irrigation from the beginning of the V3 stage of corn until the time when their stomata were completely closed. The species B. pilosa and U. decumbens worsened the negative effects on E, gs, and A of corn at different intensities under water restriction. The U. decumbens was more aggressive in relation to B. pilosa while coexisting with corn in both water regimes. The competition with corn affected the E and gs of U. decumbens in the two water regimes, but the A was altered under water deficit. On the other hand, the physiological components of B. pilosa were not affected by its coexistence with corn in the two water regimes.
publishDate 2020
dc.date.none.fl_str_mv 2020-07-01
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dc.relation.none.fl_str_mv 10.1590/1807-1929/agriambi.v24n7p465-473
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dc.publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
publisher.none.fl_str_mv Departamento de Engenharia Agrícola - UFCG
dc.source.none.fl_str_mv Revista Brasileira de Engenharia Agrícola e Ambiental v.24 n.7 2020
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