Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts.
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129995 |
Resumo: | Our objective was to measure alterations in the micrometeorological conditions surrounding canola seedlingsduring frost periods, and to quantify seedling mortality as a function of straw distribution on the ground surface. The data was acquired from 15 frosts in 2014. We used four treatments, comprising ground surface without straw (SWS), ground surface entirely straw-covered (SEC), sowing line without straw (SLW), and soil with preexisting surface straw (SES), over three experiments. Net radiation (NR), soil heat flux (G), air (Ta), leaf (Lf), rosette (Tr), and surface temperature (Ts), and plant mortality were evaluated. NR was higher in the SEC treatment and lower in the SLW treatment, whereas G was higher on straw-covered ground; Ts and Ta were lower in the SEC than in the other treatments during the most intense frosts. On 06/19, Tr in the SEC and SLW treatments was -0.66 °C and 0.42 °C, respectively; on 08/14, Lf was -3.62 °C and -2.88 °C in the SEC and SLW treatments, respectively. Plant mortality due to the frost on 06/19 was 30% in the SEC treatment, but 0% in the SLW treatment; the frost of 08/14 caused 33.8% mortality in the SEC treatment and 1.25% in the SLW treatment. This therefore showed that removing straw from the sowing line improved the microclimate around the plants, thus reducing canola mortality at the beginning of the growth cycle, which is when frost events most frequently occur. Keywords: air temperature, Brassica napus L., freezing, leaf temperature, microclimate |
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Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts.Brassica napus LLeaf temperatureAir temperatureFreezingMicroclimateOur objective was to measure alterations in the micrometeorological conditions surrounding canola seedlingsduring frost periods, and to quantify seedling mortality as a function of straw distribution on the ground surface. The data was acquired from 15 frosts in 2014. We used four treatments, comprising ground surface without straw (SWS), ground surface entirely straw-covered (SEC), sowing line without straw (SLW), and soil with preexisting surface straw (SES), over three experiments. Net radiation (NR), soil heat flux (G), air (Ta), leaf (Lf), rosette (Tr), and surface temperature (Ts), and plant mortality were evaluated. NR was higher in the SEC treatment and lower in the SLW treatment, whereas G was higher on straw-covered ground; Ts and Ta were lower in the SEC than in the other treatments during the most intense frosts. On 06/19, Tr in the SEC and SLW treatments was -0.66 °C and 0.42 °C, respectively; on 08/14, Lf was -3.62 °C and -2.88 °C in the SEC and SLW treatments, respectively. Plant mortality due to the frost on 06/19 was 30% in the SEC treatment, but 0% in the SLW treatment; the frost of 08/14 caused 33.8% mortality in the SEC treatment and 1.25% in the SLW treatment. This therefore showed that removing straw from the sowing line improved the microclimate around the plants, thus reducing canola mortality at the beginning of the growth cycle, which is when frost events most frequently occur. Keywords: air temperature, Brassica napus L., freezing, leaf temperature, microclimateSAMUEL KOVALESKI, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil; ARNO B. HELDWEIN, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil; GENEI ANTONIO DALMAGO, CNPT; JORGE ALBERTO DE GOUVEA, CNPT; GILBERTO ROCCA DA CUNHA, CNPT; ELIZANDRO FOCHESATTO, Universidade Alto Vale do Rio do Peixe, Caçador, Santa Catarina, Brazil.KOVALESKI, S.HELDWEIN, A. B.DALMAGO, G. A.GOUVEA, J. A. deCUNHA, G. R. daFOCHESATTO, E.2021-02-11T19:18:34Z2021-02-11T19:18:34Z2021-02-112020info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleJournal of Agricultural Science, v. 12, n. 11, p. 246-29, 2020.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129995enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2021-02-11T19:18:42Zoai:www.alice.cnptia.embrapa.br:doc/1129995Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542021-02-11T19:18:42falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542021-02-11T19:18:42Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
title |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
spellingShingle |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. KOVALESKI, S. Brassica napus L Leaf temperature Air temperature Freezing Microclimate |
title_short |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
title_full |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
title_fullStr |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
title_full_unstemmed |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
title_sort |
Soil-surface straw influences micrometeorological conditions affecting canola mortality during nighttime frosts. |
author |
KOVALESKI, S. |
author_facet |
KOVALESKI, S. HELDWEIN, A. B. DALMAGO, G. A. GOUVEA, J. A. de CUNHA, G. R. da FOCHESATTO, E. |
author_role |
author |
author2 |
HELDWEIN, A. B. DALMAGO, G. A. GOUVEA, J. A. de CUNHA, G. R. da FOCHESATTO, E. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
SAMUEL KOVALESKI, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil; ARNO B. HELDWEIN, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil; GENEI ANTONIO DALMAGO, CNPT; JORGE ALBERTO DE GOUVEA, CNPT; GILBERTO ROCCA DA CUNHA, CNPT; ELIZANDRO FOCHESATTO, Universidade Alto Vale do Rio do Peixe, Caçador, Santa Catarina, Brazil. |
dc.contributor.author.fl_str_mv |
KOVALESKI, S. HELDWEIN, A. B. DALMAGO, G. A. GOUVEA, J. A. de CUNHA, G. R. da FOCHESATTO, E. |
dc.subject.por.fl_str_mv |
Brassica napus L Leaf temperature Air temperature Freezing Microclimate |
topic |
Brassica napus L Leaf temperature Air temperature Freezing Microclimate |
description |
Our objective was to measure alterations in the micrometeorological conditions surrounding canola seedlingsduring frost periods, and to quantify seedling mortality as a function of straw distribution on the ground surface. The data was acquired from 15 frosts in 2014. We used four treatments, comprising ground surface without straw (SWS), ground surface entirely straw-covered (SEC), sowing line without straw (SLW), and soil with preexisting surface straw (SES), over three experiments. Net radiation (NR), soil heat flux (G), air (Ta), leaf (Lf), rosette (Tr), and surface temperature (Ts), and plant mortality were evaluated. NR was higher in the SEC treatment and lower in the SLW treatment, whereas G was higher on straw-covered ground; Ts and Ta were lower in the SEC than in the other treatments during the most intense frosts. On 06/19, Tr in the SEC and SLW treatments was -0.66 °C and 0.42 °C, respectively; on 08/14, Lf was -3.62 °C and -2.88 °C in the SEC and SLW treatments, respectively. Plant mortality due to the frost on 06/19 was 30% in the SEC treatment, but 0% in the SLW treatment; the frost of 08/14 caused 33.8% mortality in the SEC treatment and 1.25% in the SLW treatment. This therefore showed that removing straw from the sowing line improved the microclimate around the plants, thus reducing canola mortality at the beginning of the growth cycle, which is when frost events most frequently occur. Keywords: air temperature, Brassica napus L., freezing, leaf temperature, microclimate |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020 2021-02-11T19:18:34Z 2021-02-11T19:18:34Z 2021-02-11 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Journal of Agricultural Science, v. 12, n. 11, p. 246-29, 2020. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129995 |
identifier_str_mv |
Journal of Agricultural Science, v. 12, n. 11, p. 246-29, 2020. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1129995 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503502389575680 |