Weed emergence as influenced by soil moisture and air temperature
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/1928 |
Resumo: | Abstract Emergence of weed seedlings depends on soil environmental conditions; mainly temperature and moisture, with the latter being fundamental and particularly important in environments which are characterised by irregular amounts and distribution of rainfall throughout the year. Thus, this study looks at the influence of soil moisture and air temperature on the emergence of weed seedlings. The experiment was carried out under controlled environmental conditions, using rings filled with samples of undisturbed topsoil (0–2.5 cm and 0–5 cm deep) of a Luvisol. There were four moisture levels that were maintained constant, with several repetitions (16–20). The results indicate that the maximum population density of weed plants was obtained with soil moisture near field capacity. With regard to the depth of the soil containing the seeds which contributed towards optimising population density, it was noted that the first 2–3 cm of undisturbed soil were critical for maximising the population. The emergence of seedlings was modelled using data from the 5 cm topsoil with soil moisture close to field capacity. This model indicates that a mean daily temperature sum of 446°C, which under Mediterranean autumn conditions represent a period of approximately one month, is needed, in order to obtain 80% of potential autumn-winter plant density, relative to the observed potential. |
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Weed emergence as influenced by soil moisture and air temperatureEmergencePopulation densityPotential populationWeedsAbstract Emergence of weed seedlings depends on soil environmental conditions; mainly temperature and moisture, with the latter being fundamental and particularly important in environments which are characterised by irregular amounts and distribution of rainfall throughout the year. Thus, this study looks at the influence of soil moisture and air temperature on the emergence of weed seedlings. The experiment was carried out under controlled environmental conditions, using rings filled with samples of undisturbed topsoil (0–2.5 cm and 0–5 cm deep) of a Luvisol. There were four moisture levels that were maintained constant, with several repetitions (16–20). The results indicate that the maximum population density of weed plants was obtained with soil moisture near field capacity. With regard to the depth of the soil containing the seeds which contributed towards optimising population density, it was noted that the first 2–3 cm of undisturbed soil were critical for maximising the population. The emergence of seedlings was modelled using data from the 5 cm topsoil with soil moisture close to field capacity. This model indicates that a mean daily temperature sum of 446°C, which under Mediterranean autumn conditions represent a period of approximately one month, is needed, in order to obtain 80% of potential autumn-winter plant density, relative to the observed potential.Springer2010-03-10T09:58:07Z2010-03-102009-01-27T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article9016 bytesapplication/pdfhttp://hdl.handle.net/10174/1928http://hdl.handle.net/10174/1928engpag 81-881612-4758 (print) 1612-4766 (online)Volume 82(1)Journal of Pest ScienceJournal no. 10340livrejcalado@uevora.ptgb@uevora.ptmjc@uevora.ptTraugott, Michael585Calado, JoséBasch, G.Carvalho, Márioinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:37:55Zoai:dspace.uevora.pt:10174/1928Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:57:43.817697Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Weed emergence as influenced by soil moisture and air temperature |
title |
Weed emergence as influenced by soil moisture and air temperature |
spellingShingle |
Weed emergence as influenced by soil moisture and air temperature Calado, José Emergence Population density Potential population Weeds |
title_short |
Weed emergence as influenced by soil moisture and air temperature |
title_full |
Weed emergence as influenced by soil moisture and air temperature |
title_fullStr |
Weed emergence as influenced by soil moisture and air temperature |
title_full_unstemmed |
Weed emergence as influenced by soil moisture and air temperature |
title_sort |
Weed emergence as influenced by soil moisture and air temperature |
author |
Calado, José |
author_facet |
Calado, José Basch, G. Carvalho, Mário |
author_role |
author |
author2 |
Basch, G. Carvalho, Mário |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Calado, José Basch, G. Carvalho, Mário |
dc.subject.por.fl_str_mv |
Emergence Population density Potential population Weeds |
topic |
Emergence Population density Potential population Weeds |
description |
Abstract Emergence of weed seedlings depends on soil environmental conditions; mainly temperature and moisture, with the latter being fundamental and particularly important in environments which are characterised by irregular amounts and distribution of rainfall throughout the year. Thus, this study looks at the influence of soil moisture and air temperature on the emergence of weed seedlings. The experiment was carried out under controlled environmental conditions, using rings filled with samples of undisturbed topsoil (0–2.5 cm and 0–5 cm deep) of a Luvisol. There were four moisture levels that were maintained constant, with several repetitions (16–20). The results indicate that the maximum population density of weed plants was obtained with soil moisture near field capacity. With regard to the depth of the soil containing the seeds which contributed towards optimising population density, it was noted that the first 2–3 cm of undisturbed soil were critical for maximising the population. The emergence of seedlings was modelled using data from the 5 cm topsoil with soil moisture close to field capacity. This model indicates that a mean daily temperature sum of 446°C, which under Mediterranean autumn conditions represent a period of approximately one month, is needed, in order to obtain 80% of potential autumn-winter plant density, relative to the observed potential. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-27T00:00:00Z 2010-03-10T09:58:07Z 2010-03-10 |
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://hdl.handle.net/10174/1928 http://hdl.handle.net/10174/1928 |
url |
http://hdl.handle.net/10174/1928 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
pag 81-88 1612-4758 (print) 1612-4766 (online) Volume 82(1) Journal of Pest Science Journal no. 10340 livre jcalado@uevora.pt gb@uevora.pt mjc@uevora.pt Traugott, Michael 585 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
9016 bytes application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136461575946240 |