Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações do UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/20758 |
Resumo: | The Rio Grande do Sul state is the main Brazilian rice producer (Oryza sativa L.). Despite continue increase of average rice yield in the last years, there is still a huge difference between yield experiments from rice research centers and actual yield in irrigated rice in the Rio Grande do Sul. The yield potential is the yield from a cultivar that gown without biotic and abiotic limitation. Among the objectives of this study highlight (i) to introduce of three conventional rice cultivar actual widely used in RS by SimulArroz and Oryza models, (ii) to estimate yield potential and yield gap in lowland rice area in the Rio Grande do Sul state, (ii) to identify the biophysics and management factors that are potentially causing the yield gap in lowland area in the Rio Grande do Sul state. Management data were collected from 324 surveys applied in three growing seasons (2015/2016, 2016/2017 e 2017/2018). The models showed a great performance and the NRMSE varied from 0,8% to 34%. The yield potential reported in RS using Oryza v3 was 14.8 t ha-1. From the point of view of best rice fields in RS was found that they are reaching 68% of yield potential, whereas the other fields are reaching 52% of yield potential in RS. This result indicates how much fields in RS still need to improve the management, where the most consistent factors to cause the gaps were sowing date, onset irrigation, pre-sowing weed control, soybean-rice rotation, and fertilizer. The combined use of farmers and strategize research and extension programs at is a great tool to capture regional variation which can help to inform. |
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2021-05-03T13:44:46Z2021-05-03T13:44:46Z2019-12-19http://repositorio.ufsm.br/handle/1/20758The Rio Grande do Sul state is the main Brazilian rice producer (Oryza sativa L.). Despite continue increase of average rice yield in the last years, there is still a huge difference between yield experiments from rice research centers and actual yield in irrigated rice in the Rio Grande do Sul. The yield potential is the yield from a cultivar that gown without biotic and abiotic limitation. Among the objectives of this study highlight (i) to introduce of three conventional rice cultivar actual widely used in RS by SimulArroz and Oryza models, (ii) to estimate yield potential and yield gap in lowland rice area in the Rio Grande do Sul state, (ii) to identify the biophysics and management factors that are potentially causing the yield gap in lowland area in the Rio Grande do Sul state. Management data were collected from 324 surveys applied in three growing seasons (2015/2016, 2016/2017 e 2017/2018). The models showed a great performance and the NRMSE varied from 0,8% to 34%. The yield potential reported in RS using Oryza v3 was 14.8 t ha-1. From the point of view of best rice fields in RS was found that they are reaching 68% of yield potential, whereas the other fields are reaching 52% of yield potential in RS. This result indicates how much fields in RS still need to improve the management, where the most consistent factors to cause the gaps were sowing date, onset irrigation, pre-sowing weed control, soybean-rice rotation, and fertilizer. The combined use of farmers and strategize research and extension programs at is a great tool to capture regional variation which can help to inform.O Estado do Rio Grande do Sul é o principal produtor brasileiro de arroz (Oryza sativa L.). Apesar do contínuo aumento na produtividade média do arroz nos últimos anos, ainda há uma considerável diferença entre as produtividades medidas em experimentos de estações de pesquisa de arroz e da produtividade média atual de arroz no Rio Grande do Sul. O potencial de produtividade é a produtividade de uma cultivar que cresce sem limitações biótica e abiótica. Entre os objetivos deste projeto destacam-se (i) introduzir três cultivares convencionais de arroz atualmente, muito utilizadas no RS nos modelos SimulArroz e Oryza, (ii) estimar o potencial de produtividade e as lacunas de produtividade da culturas do arroz nas regiões de terras baixas do Estado do Rio Grande do Sul, (ii) identificar os fatores biofísicos e de manejo que potencialmente explicam a lacuna de produtividade nas lavouras de arroz nas regiões de terras baixas do Estado do Rio Grande do Sul. Levantamento de dados de manejo foram feitos por meio de 324 questionários aplicados em três anos agrícolas (2015/2016, 2016/2017 e 2017/2018). Os modelos mostraram bom desempemho, apresentando variação do NRMSE entre 0,8% à 34%. O potencial reportado no RS com o modelo Oryza v3 (14,8 t ha-1). Sob ponto de vista das melhores lavouras de arroz no RS foi observado que estão produzindo 68% do potencial, enquanto que as demais lavouras estão produzindo 52% do potencial no RS. Estes resultados indicam o quanto, ainda, é possível melhorar o manejo de arroz no RS sendo época de semeadura, época de entrada de água na lavoura, controle de plantas daninhas, rotação de culturas e fertilizantes os fatores que potencialmente estão relacionados com a lacuna. O uso combinado entre agricultores e a estratégia de programas de pesquisa e extensão é uma ótima ferramenta para capturar variações regionais que podem ajudar a transferencia de informar.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESporUniversidade Federal de Santa MariaCentro de Ciências RuraisPrograma de Pós-Graduação em Engenharia AgrícolaUFSMBrasilEngenharia AgrícolaAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessOryza sativaYield potentialYield gapFarmersSurveysPotencial de produtividadeLacuna de produtividadeLavourasQuestionáriosCNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLAPotencial e lacunas de produtividade em arroz irrigado no Rio Grande do SulYield potential and yield gap in irrigated rice in Rio Grande do Sulinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisStreck, Nereu Augustohttp://lattes.cnpq.br/8121082379157248Carlos, Filipe SelauUlguim, André da RosaZanon, Alencar JuniorAlberto, Cleber Maushttp://lattes.cnpq.br/3501668642678299Ribas, Giovana Ghisleni5003000000086006006006006006006003b01ed40-f2a9-4cc8-9109-59e6f482b05dc2285a88-5aad-464b-b82b-1170048583c92863d2d6-f1fe-4f0e-8d48-92ac7a67a6a033bbf2af-46fa-46b9-94b3-bc2bd1ec179177cca0c4-a9ce-459f-8942-4da5f16414bfed22747e-b107-4eae-869a-721f965c0198reponame:Biblioteca Digital de Teses e Dissertações do UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALTES_PPGEA_2019_RIBAS_GIOVANA.pdfTES_PPGEA_2019_RIBAS_GIOVANA.pdfTeseapplication/pdf2021497http://repositorio.ufsm.br/bitstream/1/20758/1/TES_PPGEA_2019_RIBAS_GIOVANA.pdf1d22d5645a2951f4fc486bbc5089ca3aMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; 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dc.title.por.fl_str_mv |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
dc.title.alternative.eng.fl_str_mv |
Yield potential and yield gap in irrigated rice in Rio Grande do Sul |
title |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
spellingShingle |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul Ribas, Giovana Ghisleni Oryza sativa Yield potential Yield gap Farmers Surveys Potencial de produtividade Lacuna de produtividade Lavouras Questionários CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
title_short |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
title_full |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
title_fullStr |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
title_full_unstemmed |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
title_sort |
Potencial e lacunas de produtividade em arroz irrigado no Rio Grande do Sul |
author |
Ribas, Giovana Ghisleni |
author_facet |
Ribas, Giovana Ghisleni |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Streck, Nereu Augusto |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/8121082379157248 |
dc.contributor.referee1.fl_str_mv |
Carlos, Filipe Selau |
dc.contributor.referee2.fl_str_mv |
Ulguim, André da Rosa |
dc.contributor.referee3.fl_str_mv |
Zanon, Alencar Junior |
dc.contributor.referee4.fl_str_mv |
Alberto, Cleber Maus |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3501668642678299 |
dc.contributor.author.fl_str_mv |
Ribas, Giovana Ghisleni |
contributor_str_mv |
Streck, Nereu Augusto Carlos, Filipe Selau Ulguim, André da Rosa Zanon, Alencar Junior Alberto, Cleber Maus |
dc.subject.eng.fl_str_mv |
Oryza sativa Yield potential Yield gap Farmers Surveys |
topic |
Oryza sativa Yield potential Yield gap Farmers Surveys Potencial de produtividade Lacuna de produtividade Lavouras Questionários CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
dc.subject.por.fl_str_mv |
Potencial de produtividade Lacuna de produtividade Lavouras Questionários |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA |
description |
The Rio Grande do Sul state is the main Brazilian rice producer (Oryza sativa L.). Despite continue increase of average rice yield in the last years, there is still a huge difference between yield experiments from rice research centers and actual yield in irrigated rice in the Rio Grande do Sul. The yield potential is the yield from a cultivar that gown without biotic and abiotic limitation. Among the objectives of this study highlight (i) to introduce of three conventional rice cultivar actual widely used in RS by SimulArroz and Oryza models, (ii) to estimate yield potential and yield gap in lowland rice area in the Rio Grande do Sul state, (ii) to identify the biophysics and management factors that are potentially causing the yield gap in lowland area in the Rio Grande do Sul state. Management data were collected from 324 surveys applied in three growing seasons (2015/2016, 2016/2017 e 2017/2018). The models showed a great performance and the NRMSE varied from 0,8% to 34%. The yield potential reported in RS using Oryza v3 was 14.8 t ha-1. From the point of view of best rice fields in RS was found that they are reaching 68% of yield potential, whereas the other fields are reaching 52% of yield potential in RS. This result indicates how much fields in RS still need to improve the management, where the most consistent factors to cause the gaps were sowing date, onset irrigation, pre-sowing weed control, soybean-rice rotation, and fertilizer. The combined use of farmers and strategize research and extension programs at is a great tool to capture regional variation which can help to inform. |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-12-19 |
dc.date.accessioned.fl_str_mv |
2021-05-03T13:44:46Z |
dc.date.available.fl_str_mv |
2021-05-03T13:44:46Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/doctoralThesis |
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doctoralThesis |
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publishedVersion |
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http://repositorio.ufsm.br/handle/1/20758 |
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http://repositorio.ufsm.br/handle/1/20758 |
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por |
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por |
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500300000008 |
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600 600 600 600 600 600 600 |
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Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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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 |
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Programa de Pós-Graduação em Engenharia Agrícola |
dc.publisher.initials.fl_str_mv |
UFSM |
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Brasil |
dc.publisher.department.fl_str_mv |
Engenharia Agrícola |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria Centro de Ciências Rurais |
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