SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.14393/BJ-v38n0a2022-60820 http://hdl.handle.net/11449/249198 |
Resumo: | This study aimed to evaluate the effects of different sowing depths and light intensities on the emergence and development of the monocot weed species, Urochloa decumbens and Cenchrus echinatus, under field conditions. Each species constituted an experiment, and the experimental design was completely randomized with four replicates. The treatments were arranged in a 6 x 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four solar radiation intensities (100%, 70%, 50%, and 30%) obtained through the use of shading screens. Seedling emergence capacity was evaluated daily to obtain the emergence percentage and speed index. Plant height, floral induction time, and plant dry matter at flowering were measured. Even when subjected to different solar radiation intensities, U. decumbens and C. echinatus seedlings emerged at all the sowing depths. Sowing between 2.0-and 4.0-cm depths favored the emergence of seedlings of U. decumbens and C. echinatus. However, sowing at 12-cm depth reduced the emergence of both species regardless of the solar radiation intensity. Urichloa decumbens plants grown under conditions of greater shading showed the lowest values of height and dry matter accumulation during flowering. High levels of shading facilitated only the etiolation of C. echinatus plants. Increased shading flowering time in both species compared to full sunlight. |
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spelling |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDSBrightnessCenchrus echinatusField conditionShadingUrochloa decumbensThis study aimed to evaluate the effects of different sowing depths and light intensities on the emergence and development of the monocot weed species, Urochloa decumbens and Cenchrus echinatus, under field conditions. Each species constituted an experiment, and the experimental design was completely randomized with four replicates. The treatments were arranged in a 6 x 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four solar radiation intensities (100%, 70%, 50%, and 30%) obtained through the use of shading screens. Seedling emergence capacity was evaluated daily to obtain the emergence percentage and speed index. Plant height, floral induction time, and plant dry matter at flowering were measured. Even when subjected to different solar radiation intensities, U. decumbens and C. echinatus seedlings emerged at all the sowing depths. Sowing between 2.0-and 4.0-cm depths favored the emergence of seedlings of U. decumbens and C. echinatus. However, sowing at 12-cm depth reduced the emergence of both species regardless of the solar radiation intensity. Urichloa decumbens plants grown under conditions of greater shading showed the lowest values of height and dry matter accumulation during flowering. High levels of shading facilitated only the etiolation of C. echinatus plants. Increased shading flowering time in both species compared to full sunlight.Department of Plant Science São Paulo State University, São PauloDepartment of Forestry Technology College of the State of São Paulo-Capão Bonito, São PauloDepartment of Agronomy State University of Mato Grosso, Mato GrossoDepartment of Plant Science São Paulo State University, São PauloUniversidade Estadual Paulista (UNESP)Technology College of the State of São Paulo-Capão BonitoState University of Mato GrossoMarques, Ricardo Fagundes [UNESP]Souza, Guilherme Sasso Ferreira [UNESP]Pereira, Maria Renata RochaMarchi, Sidnei RobertoMartins, Cibele Chalita [UNESP]Martins, Dagoberto [UNESP]2023-07-29T14:12:56Z2023-07-29T14:12:56Z2022-02-16info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.14393/BJ-v38n0a2022-60820Bioscience Journal, v. 38.1981-31631516-3725http://hdl.handle.net/11449/24919810.14393/BJ-v38n0a2022-608202-s2.0-85138704562Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBioscience Journalinfo:eu-repo/semantics/openAccess2024-04-30T15:59:04Zoai:repositorio.unesp.br:11449/249198Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:22:54.069202Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
title |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
spellingShingle |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS Marques, Ricardo Fagundes [UNESP] Brightness Cenchrus echinatus Field condition Shading Urochloa decumbens |
title_short |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
title_full |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
title_fullStr |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
title_full_unstemmed |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
title_sort |
SOWING DEPTH AND LIGHT INTENSITY IN THE EMERGENCE AND DEVELOPMENT OF MONOCOTYLEDONOUS WEEDS |
author |
Marques, Ricardo Fagundes [UNESP] |
author_facet |
Marques, Ricardo Fagundes [UNESP] Souza, Guilherme Sasso Ferreira [UNESP] Pereira, Maria Renata Rocha Marchi, Sidnei Roberto Martins, Cibele Chalita [UNESP] Martins, Dagoberto [UNESP] |
author_role |
author |
author2 |
Souza, Guilherme Sasso Ferreira [UNESP] Pereira, Maria Renata Rocha Marchi, Sidnei Roberto Martins, Cibele Chalita [UNESP] Martins, Dagoberto [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Technology College of the State of São Paulo-Capão Bonito State University of Mato Grosso |
dc.contributor.author.fl_str_mv |
Marques, Ricardo Fagundes [UNESP] Souza, Guilherme Sasso Ferreira [UNESP] Pereira, Maria Renata Rocha Marchi, Sidnei Roberto Martins, Cibele Chalita [UNESP] Martins, Dagoberto [UNESP] |
dc.subject.por.fl_str_mv |
Brightness Cenchrus echinatus Field condition Shading Urochloa decumbens |
topic |
Brightness Cenchrus echinatus Field condition Shading Urochloa decumbens |
description |
This study aimed to evaluate the effects of different sowing depths and light intensities on the emergence and development of the monocot weed species, Urochloa decumbens and Cenchrus echinatus, under field conditions. Each species constituted an experiment, and the experimental design was completely randomized with four replicates. The treatments were arranged in a 6 x 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four solar radiation intensities (100%, 70%, 50%, and 30%) obtained through the use of shading screens. Seedling emergence capacity was evaluated daily to obtain the emergence percentage and speed index. Plant height, floral induction time, and plant dry matter at flowering were measured. Even when subjected to different solar radiation intensities, U. decumbens and C. echinatus seedlings emerged at all the sowing depths. Sowing between 2.0-and 4.0-cm depths favored the emergence of seedlings of U. decumbens and C. echinatus. However, sowing at 12-cm depth reduced the emergence of both species regardless of the solar radiation intensity. Urichloa decumbens plants grown under conditions of greater shading showed the lowest values of height and dry matter accumulation during flowering. High levels of shading facilitated only the etiolation of C. echinatus plants. Increased shading flowering time in both species compared to full sunlight. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-02-16 2023-07-29T14:12:56Z 2023-07-29T14:12:56Z |
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 |
http://dx.doi.org/10.14393/BJ-v38n0a2022-60820 Bioscience Journal, v. 38. 1981-3163 1516-3725 http://hdl.handle.net/11449/249198 10.14393/BJ-v38n0a2022-60820 2-s2.0-85138704562 |
url |
http://dx.doi.org/10.14393/BJ-v38n0a2022-60820 http://hdl.handle.net/11449/249198 |
identifier_str_mv |
Bioscience Journal, v. 38. 1981-3163 1516-3725 10.14393/BJ-v38n0a2022-60820 2-s2.0-85138704562 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Bioscience Journal |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808129421767344128 |