Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional Manancial UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/20714 |
Resumo: | The objective of this work was to quantify the damage caused by frosts in the reproductive period of canola and to develop models for their estimation. In 2016 and 2017 two experiments were carried out under controlled conditions and two field experiments. The experiments in a controlled environment were conducted in a completely randomized design and factorial arrangement. Plants with and without cold acclimatization were exposed to the air temperature of -6°C. In the filed, the experiments were conducted in randomized complete block design, with subdivided plot and factorial arrangement. The analyzes were performed considering a factorial sample design within the blocks of the original experiment. Biometric evaluations were performed before and after frosts in controlled and field environment. In the field environment it was evaluated the air temperature (Tar) in the canopy at 5, 40, 100 and 150 cm of the soil and the temperature of reproductive structures (Ter). Models were developed to estimate the minimum air temperature close to the reproductive structures (TnE), minimum temperature of the reproductive structures (Tner) and the ovules mortality in reproductive structures, by linear regression. Ovules death in Flowers (F) and Flower buds (B) begins with Tar of 2.4 and 1.9°C, respectively. Death of all ovules would occur with Tar of -6.7 and -10.2°C in F and B, respectively. Tar of -4.80°C caused the death of 70 to 90% of the ovules in F and siliques with less than 2 cm length (S <2). The equation describing the evolution of ovules numbers in frosty night indicates that ovules death begins with Tar of 0.81°C and total death occurs with Tar of -6.52°C. B, F and S <2 present abortion 27% higher than siliques with more than 2 cm length (S>2). If B, F and S <2 do not abort they present a 79% larger number of grains than S>2. The lowest Tn occurred at the top of the canopy. The mean gradient between the lowest and highest Tn in the canopy is 1.64, 0.91, 1.22 and 0.75°C in severe frosts, moderate frosts, light frosts and cold days, respectively. . It is possible to estimate the Tner during the canola cycle, according to data obtained from the meteorological station, with the model Tner = 1.21 (Tn Aut1) - 2.77 When Tn less than 5°C it is possible to estimate Tner with the model Tner = 1.09 (Tn Aut) - 3.06. Damage caused by frost in the reproductive period of canola can be quantified from Tn measured in automatic weather station and/or Tn measured at reference position within the crop. |
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2021-04-28T17:59:28Z2021-04-28T17:59:28Z2019-02-22http://repositorio.ufsm.br/handle/1/20714The objective of this work was to quantify the damage caused by frosts in the reproductive period of canola and to develop models for their estimation. In 2016 and 2017 two experiments were carried out under controlled conditions and two field experiments. The experiments in a controlled environment were conducted in a completely randomized design and factorial arrangement. Plants with and without cold acclimatization were exposed to the air temperature of -6°C. In the filed, the experiments were conducted in randomized complete block design, with subdivided plot and factorial arrangement. The analyzes were performed considering a factorial sample design within the blocks of the original experiment. Biometric evaluations were performed before and after frosts in controlled and field environment. In the field environment it was evaluated the air temperature (Tar) in the canopy at 5, 40, 100 and 150 cm of the soil and the temperature of reproductive structures (Ter). Models were developed to estimate the minimum air temperature close to the reproductive structures (TnE), minimum temperature of the reproductive structures (Tner) and the ovules mortality in reproductive structures, by linear regression. Ovules death in Flowers (F) and Flower buds (B) begins with Tar of 2.4 and 1.9°C, respectively. Death of all ovules would occur with Tar of -6.7 and -10.2°C in F and B, respectively. Tar of -4.80°C caused the death of 70 to 90% of the ovules in F and siliques with less than 2 cm length (S <2). The equation describing the evolution of ovules numbers in frosty night indicates that ovules death begins with Tar of 0.81°C and total death occurs with Tar of -6.52°C. B, F and S <2 present abortion 27% higher than siliques with more than 2 cm length (S>2). If B, F and S <2 do not abort they present a 79% larger number of grains than S>2. The lowest Tn occurred at the top of the canopy. The mean gradient between the lowest and highest Tn in the canopy is 1.64, 0.91, 1.22 and 0.75°C in severe frosts, moderate frosts, light frosts and cold days, respectively. . It is possible to estimate the Tner during the canola cycle, according to data obtained from the meteorological station, with the model Tner = 1.21 (Tn Aut1) - 2.77 When Tn less than 5°C it is possible to estimate Tner with the model Tner = 1.09 (Tn Aut) - 3.06. Damage caused by frost in the reproductive period of canola can be quantified from Tn measured in automatic weather station and/or Tn measured at reference position within the crop.O objetivo deste trabalho foi quantificar os danos provocados por geadas no período reprodutivo da canola e desenvolver modelos para estima-los. Em 2016 e 2017 foram realizados dois experimentos em condições controladas e dois experimentos a campo. Os experimentos em ambiente controlado foram conduzidos em delineamento inteiramente casualizado e arranjo fatorial. As plantas com e sem aclimatação ao frio foram expostas à temperatura do ar de -6°C. Em ambiente externo, os experimentos foram conduzidos em delineamento experimental em blocos ao acaso, com parcela subdividida e arranjo fatorial. As avaliações e análises foram realizadas considerando delineamento amostral fatorial dentro dos blocos do experimento original. Foram realizadas avaliações biométricas antes e após as geadas em ambiente controlado e natural. Em ambiente natural avaliou-se a temperatura do ar (Tar) no dossel a 5, 40, 100 e 150 cm do solo e a temperatura de estruturas reprodutivas (Ter). Desenvolveram-se modelos para estimativa da temperatura mínima do ar próximo às estruturas reprodutivas (TnE), da temperatura mínima das estruturas reprodutivas (Tner) e da mortalidade de óvulos em estruturas reprodutivas, por regressão linear simples. A geada provocou a morte de 79% das plantas não aclimatadas e aumentou o abortamento de estruturas reprodutivas de 43 a 120%. A morte de óvulos em Flores (F) e Botões florais (B) iniciou com Tar de 2,4 e 1,9°C, respectivamente. A morte de todos óvulos ocorreria com Tar de -6,7 e -10,2°C em F e B, respectivamente. A Tar de -4,80°C provocou a morte de 70 a 90% dos óvulos em F e em síliquas com menos de 2 cm de comprimento (S<2). A equação que descreve a evolução da mortalidade de óvulos, em noite com geada, indicou que a morte de óvulos inicia com Tar de 0,81°C e a morte total ocorreria com Tar de -6,52°C. B, F e S<2 apresentaram abortamento 27% maior do que síliquas com mais de 2 cm de comprimento, porém, quando B, F e S<2 não abortaram apresentaram número de grãos 79% maior do que S>2. A menor Tn ocorreu no topo do dossel. O gradiente entre a menor e maior Tn no dossel foi de 1,64, 0,91, 1,22 e 0,75°C em geadas fortes, moderadas, fracas e dias frios, respectivamente. É possível estimar a Tner durante o ciclo da canola, em função de dados de estação meteorológica, com o modelo o Tner = 1,21(Tn Aut1) - 2,77 e em dias com Tn menor do que 5°C com o modelo Tner = 1,09(Tn Aut) - 3,06. Danos causados por geadas no período reprodutivo da canola podem ser quantificados a partir de Tn medida em estação meteorológica automática e/ou Tn medida em posição de referência dentro da lavoura.porUniversidade Federal de Santa MariaCentro de Ciências RuraisPrograma de Pós-Graduação em AgronomiaUFSMBrasilAgronomiaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessTemperatura do arCongelamentoEstruturas reprodutivasMicroclima no dosselAir temperatureFreezingReproductive structuresMicroclimate in the canopyCNPQ::CIENCIAS AGRARIAS::AGRONOMIACaracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canolaCharacterization, quantification and modeling of damages caused by the frost in the reproductive period of canolainfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisHeldwein, Arno Bernardohttp://lattes.cnpq.br/6671155842231311Nied, Astor HenriqueXXXXXXXXXXXXXXXDalmago, Genei AntônioXXXXXXXXXXXXXXXXXXMaldaner, Ivan CarlosXXXXXXXXXXXXXXXGouvêa, Jorge AlbertoXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXKovaleski, Samuel5001000000096002075a668-626c-446c-8b01-37ca432bd67faafa38ff-c356-4f8b-b0c0-376d74763807da13e0bc-bc71-4c22-af4f-750a296ab03585d81c26-22e9-4941-b470-679f60955ee8bb0c0162-291e-48bb-978a-c94f3a543acbeb20d56e-cc09-4991-933e-b21ba15b2a3areponame:Repositório Institucional Manancial UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALTES_PPGAGRONOMIA_2019_KOVALESKI_SAMUEL.pdfTES_PPGAGRONOMIA_2019_KOVALESKI_SAMUEL.pdfTese de Doutoradoapplication/pdf2138690http://repositorio.ufsm.br/bitstream/1/20714/1/TES_PPGAGRONOMIA_2019_KOVALESKI_SAMUEL.pdfb36e4bd2fc7f5d5fae10ae96dd64161bMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
dc.title.alternative.eng.fl_str_mv |
Characterization, quantification and modeling of damages caused by the frost in the reproductive period of canola |
title |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
spellingShingle |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola Kovaleski, Samuel Temperatura do ar Congelamento Estruturas reprodutivas Microclima no dossel Air temperature Freezing Reproductive structures Microclimate in the canopy CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
title_full |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
title_fullStr |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
title_full_unstemmed |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
title_sort |
Caracterização, quantificação e modelagem de danos provocados pela geada no período reprodutivo da canola |
author |
Kovaleski, Samuel |
author_facet |
Kovaleski, Samuel |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Heldwein, Arno Bernardo |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/6671155842231311 |
dc.contributor.referee1.fl_str_mv |
Nied, Astor Henrique |
dc.contributor.referee1Lattes.fl_str_mv |
XXXXXXXXXXXXXXX |
dc.contributor.referee2.fl_str_mv |
Dalmago, Genei Antônio |
dc.contributor.referee2Lattes.fl_str_mv |
XXXXXXXXXXXXXXXXXX |
dc.contributor.referee3.fl_str_mv |
Maldaner, Ivan Carlos |
dc.contributor.referee3Lattes.fl_str_mv |
XXXXXXXXXXXXXXX |
dc.contributor.referee4.fl_str_mv |
Gouvêa, Jorge Alberto |
dc.contributor.referee4Lattes.fl_str_mv |
XXXXXXXXXXXXXXXXXX |
dc.contributor.authorLattes.fl_str_mv |
XXXXXXXXXXXXXXXX |
dc.contributor.author.fl_str_mv |
Kovaleski, Samuel |
contributor_str_mv |
Heldwein, Arno Bernardo Nied, Astor Henrique Dalmago, Genei Antônio Maldaner, Ivan Carlos Gouvêa, Jorge Alberto |
dc.subject.por.fl_str_mv |
Temperatura do ar Congelamento Estruturas reprodutivas Microclima no dossel |
topic |
Temperatura do ar Congelamento Estruturas reprodutivas Microclima no dossel Air temperature Freezing Reproductive structures Microclimate in the canopy CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Air temperature Freezing Reproductive structures Microclimate in the canopy |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
The objective of this work was to quantify the damage caused by frosts in the reproductive period of canola and to develop models for their estimation. In 2016 and 2017 two experiments were carried out under controlled conditions and two field experiments. The experiments in a controlled environment were conducted in a completely randomized design and factorial arrangement. Plants with and without cold acclimatization were exposed to the air temperature of -6°C. In the filed, the experiments were conducted in randomized complete block design, with subdivided plot and factorial arrangement. The analyzes were performed considering a factorial sample design within the blocks of the original experiment. Biometric evaluations were performed before and after frosts in controlled and field environment. In the field environment it was evaluated the air temperature (Tar) in the canopy at 5, 40, 100 and 150 cm of the soil and the temperature of reproductive structures (Ter). Models were developed to estimate the minimum air temperature close to the reproductive structures (TnE), minimum temperature of the reproductive structures (Tner) and the ovules mortality in reproductive structures, by linear regression. Ovules death in Flowers (F) and Flower buds (B) begins with Tar of 2.4 and 1.9°C, respectively. Death of all ovules would occur with Tar of -6.7 and -10.2°C in F and B, respectively. Tar of -4.80°C caused the death of 70 to 90% of the ovules in F and siliques with less than 2 cm length (S <2). The equation describing the evolution of ovules numbers in frosty night indicates that ovules death begins with Tar of 0.81°C and total death occurs with Tar of -6.52°C. B, F and S <2 present abortion 27% higher than siliques with more than 2 cm length (S>2). If B, F and S <2 do not abort they present a 79% larger number of grains than S>2. The lowest Tn occurred at the top of the canopy. The mean gradient between the lowest and highest Tn in the canopy is 1.64, 0.91, 1.22 and 0.75°C in severe frosts, moderate frosts, light frosts and cold days, respectively. . It is possible to estimate the Tner during the canola cycle, according to data obtained from the meteorological station, with the model Tner = 1.21 (Tn Aut1) - 2.77 When Tn less than 5°C it is possible to estimate Tner with the model Tner = 1.09 (Tn Aut) - 3.06. Damage caused by frost in the reproductive period of canola can be quantified from Tn measured in automatic weather station and/or Tn measured at reference position within the crop. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-02-22 |
dc.date.accessioned.fl_str_mv |
2021-04-28T17:59:28Z |
dc.date.available.fl_str_mv |
2021-04-28T17:59:28Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/20714 |
url |
http://repositorio.ufsm.br/handle/1/20714 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.cnpq.fl_str_mv |
500100000009 |
dc.relation.confidence.fl_str_mv |
600 |
dc.relation.authority.fl_str_mv |
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dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Agronomia |
dc.publisher.initials.fl_str_mv |
UFSM |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Agronomia |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
dc.source.none.fl_str_mv |
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repository.name.fl_str_mv |
Repositório Institucional Manancial UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
ouvidoria@ufsm.br |
_version_ |
1808854698276421632 |