Light intensity and sowing depth on the emergence and development of weeds
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.51694/ADVWEEDSCI/2021 http://hdl.handle.net/11449/241732 |
Resumo: | Background: Weeds are one of the ecological factors that affect the agricultural economy permanently. Thus, understanding the weed emergence and development is essential in decision making for management strategies. Objective: This study aimed to evaluate the effect of different sowing depths and light intensities on the emergence and development of the weed species Euphorbia heterophylla and Desmodium tortuosum under field conditions. Methods: Each species consisted of an experiment carried out in a completely randomized design with four replications. Treatments were arranged in a 6 × 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four light intensities (100, 70, 50, and 30% of the solar light intensity) obtained with shading screens. Seedling emergence capacity was evaluated daily to obtain the percentage of emergence and the emergence rate index (ERI). Plant height, time to floral induction, plant dry matter during flowering were also evaluated. Results: Seedlings of E. heterophylla emerged under all solar radiation conditions and sowing up to 12.0 cm deep, while seedlings of D. tortuosum showed no emergence only at 12.0 cm deep with light intensities below 70%. The 100% solar radiation condition provided higher total and daily dry matter accumulation in E. heterophylla plants, while D. tortuosum plants showed higher values for both variables under 70 and 50% incidence of solar radiation. Conclusions: The full sunlight condition provided the best development of E. heterophylla plants. Different levels of lightness and sowing depths interfere the emergence and the development of D. tortuosum plants. |
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Repositório Institucional da UNESP |
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Light intensity and sowing depth on the emergence and development of weedsDesmodium tortuosumEuphorbia heterophyllaField conditionLightnessShadingBackground: Weeds are one of the ecological factors that affect the agricultural economy permanently. Thus, understanding the weed emergence and development is essential in decision making for management strategies. Objective: This study aimed to evaluate the effect of different sowing depths and light intensities on the emergence and development of the weed species Euphorbia heterophylla and Desmodium tortuosum under field conditions. Methods: Each species consisted of an experiment carried out in a completely randomized design with four replications. Treatments were arranged in a 6 × 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four light intensities (100, 70, 50, and 30% of the solar light intensity) obtained with shading screens. Seedling emergence capacity was evaluated daily to obtain the percentage of emergence and the emergence rate index (ERI). Plant height, time to floral induction, plant dry matter during flowering were also evaluated. Results: Seedlings of E. heterophylla emerged under all solar radiation conditions and sowing up to 12.0 cm deep, while seedlings of D. tortuosum showed no emergence only at 12.0 cm deep with light intensities below 70%. The 100% solar radiation condition provided higher total and daily dry matter accumulation in E. heterophylla plants, while D. tortuosum plants showed higher values for both variables under 70 and 50% incidence of solar radiation. Conclusions: The full sunlight condition provided the best development of E. heterophylla plants. Different levels of lightness and sowing depths interfere the emergence and the development of D. tortuosum plants.Faculdade de Ciências Agronômicas Universidade Estadual Paulista “Júlio de Mesquita Filho”, SPFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista “Júlio de Mesquita Filho”, SPFaculdade de Tecnologia de Capão Bonito, SPUniversidade Federal de Mato Grosso, MTFaculdade de Ciências Agronômicas Universidade Estadual Paulista “Júlio de Mesquita Filho”, SPFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista “Júlio de Mesquita Filho”, SPUniversidade Estadual Paulista (UNESP)Faculdade de Tecnologia de Capão BonitoUniversidade Federal de Mato GrossoSouza, Guilherme Sasso Ferreira [UNESP]Marques, Ricardo Fagundes [UNESP]Pereira, Maria Renata Rochade Marchi, Sidnei RobertoMartins, Dagoberto [UNESP]2023-03-01T21:18:50Z2023-03-01T21:18:50Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.51694/ADVWEEDSCI/2021Advances in Weed Science, v. 39.2675-9462http://hdl.handle.net/11449/24173210.51694/ADVWEEDSCI/20212-s2.0-85128194130Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAdvances in Weed Scienceinfo:eu-repo/semantics/openAccess2024-04-30T19:28:14Zoai:repositorio.unesp.br:11449/241732Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:33:42.559462Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Light intensity and sowing depth on the emergence and development of weeds |
title |
Light intensity and sowing depth on the emergence and development of weeds |
spellingShingle |
Light intensity and sowing depth on the emergence and development of weeds Souza, Guilherme Sasso Ferreira [UNESP] Desmodium tortuosum Euphorbia heterophylla Field condition Lightness Shading |
title_short |
Light intensity and sowing depth on the emergence and development of weeds |
title_full |
Light intensity and sowing depth on the emergence and development of weeds |
title_fullStr |
Light intensity and sowing depth on the emergence and development of weeds |
title_full_unstemmed |
Light intensity and sowing depth on the emergence and development of weeds |
title_sort |
Light intensity and sowing depth on the emergence and development of weeds |
author |
Souza, Guilherme Sasso Ferreira [UNESP] |
author_facet |
Souza, Guilherme Sasso Ferreira [UNESP] Marques, Ricardo Fagundes [UNESP] Pereira, Maria Renata Rocha de Marchi, Sidnei Roberto Martins, Dagoberto [UNESP] |
author_role |
author |
author2 |
Marques, Ricardo Fagundes [UNESP] Pereira, Maria Renata Rocha de Marchi, Sidnei Roberto Martins, Dagoberto [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Faculdade de Tecnologia de Capão Bonito Universidade Federal de Mato Grosso |
dc.contributor.author.fl_str_mv |
Souza, Guilherme Sasso Ferreira [UNESP] Marques, Ricardo Fagundes [UNESP] Pereira, Maria Renata Rocha de Marchi, Sidnei Roberto Martins, Dagoberto [UNESP] |
dc.subject.por.fl_str_mv |
Desmodium tortuosum Euphorbia heterophylla Field condition Lightness Shading |
topic |
Desmodium tortuosum Euphorbia heterophylla Field condition Lightness Shading |
description |
Background: Weeds are one of the ecological factors that affect the agricultural economy permanently. Thus, understanding the weed emergence and development is essential in decision making for management strategies. Objective: This study aimed to evaluate the effect of different sowing depths and light intensities on the emergence and development of the weed species Euphorbia heterophylla and Desmodium tortuosum under field conditions. Methods: Each species consisted of an experiment carried out in a completely randomized design with four replications. Treatments were arranged in a 6 × 4 factorial scheme, with six sowing depths (0.5, 1.0, 2.0, 4.0, 8.0, and 12.0 cm) associated with four light intensities (100, 70, 50, and 30% of the solar light intensity) obtained with shading screens. Seedling emergence capacity was evaluated daily to obtain the percentage of emergence and the emergence rate index (ERI). Plant height, time to floral induction, plant dry matter during flowering were also evaluated. Results: Seedlings of E. heterophylla emerged under all solar radiation conditions and sowing up to 12.0 cm deep, while seedlings of D. tortuosum showed no emergence only at 12.0 cm deep with light intensities below 70%. The 100% solar radiation condition provided higher total and daily dry matter accumulation in E. heterophylla plants, while D. tortuosum plants showed higher values for both variables under 70 and 50% incidence of solar radiation. Conclusions: The full sunlight condition provided the best development of E. heterophylla plants. Different levels of lightness and sowing depths interfere the emergence and the development of D. tortuosum plants. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 2023-03-01T21:18:50Z 2023-03-01T21:18:50Z |
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/10.51694/ADVWEEDSCI/2021 Advances in Weed Science, v. 39. 2675-9462 http://hdl.handle.net/11449/241732 10.51694/ADVWEEDSCI/2021 2-s2.0-85128194130 |
url |
http://dx.doi.org/10.51694/ADVWEEDSCI/2021 http://hdl.handle.net/11449/241732 |
identifier_str_mv |
Advances in Weed Science, v. 39. 2675-9462 10.51694/ADVWEEDSCI/2021 2-s2.0-85128194130 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Advances in Weed Science |
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 |
|
_version_ |
1808128378400669696 |