Light intensity and sowing depth on the emergence and development of weeds

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dc.contributor.authorSouza, Guilherme Sasso Ferreira [UNESP]
dc.contributor.authorMarques, Ricardo Fagundes [UNESP]
dc.contributor.authorPereira, Maria Renata Rocha
dc.contributor.authorde Marchi, Sidnei Roberto
dc.contributor.authorMartins, Dagoberto [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionFaculdade de Tecnologia de Capão Bonito
dc.contributor.institutionUniversidade Federal de Mato Grosso
dc.date.accessioned2023-03-01T21:18:50Z
dc.date.available2023-03-01T21:18:50Z
dc.date.issued2021-01-01
dc.description.abstractBackground: 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.en
dc.description.affiliationFaculdade de Ciências Agronômicas Universidade Estadual Paulista “Júlio de Mesquita Filho”, SP
dc.description.affiliationFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista “Júlio de Mesquita Filho”, SP
dc.description.affiliationFaculdade de Tecnologia de Capão Bonito, SP
dc.description.affiliationUniversidade Federal de Mato Grosso, MT
dc.description.affiliationUnespFaculdade de Ciências Agronômicas Universidade Estadual Paulista “Júlio de Mesquita Filho”, SP
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias Universidade Estadual Paulista “Júlio de Mesquita Filho”, SP
dc.identifierhttp://dx.doi.org/10.51694/ADVWEEDSCI/2021
dc.identifier.citationAdvances in Weed Science, v. 39.
dc.identifier.doi10.51694/ADVWEEDSCI/2021
dc.identifier.issn2675-9462
dc.identifier.scopus2-s2.0-85128194130
dc.identifier.urihttp://hdl.handle.net/11449/241732
dc.language.isoeng
dc.relation.ispartofAdvances in Weed Science
dc.sourceScopus
dc.subjectDesmodium tortuosum
dc.subjectEuphorbia heterophylla
dc.subjectField condition
dc.subjectLightness
dc.subjectShading
dc.titleLight intensity and sowing depth on the emergence and development of weedsen
dc.typeArtigo
unesp.departmentProdução e Melhoramento Vegetal - FCApt
unesp.departmentSolos e Recursos Ambientais - FCApt

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Botucatu - FCA - Faculdade de Ciências Agronômicas
Artigos - Genética - IBB