Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho
Ano de defesa: | 2005 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Pelotas
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Ciência e Tecnologia de Sementes
|
Departamento: |
Faculdade de Agronomia Eliseu Maciel
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufpel.edu.br/handle/ri/1442 |
Resumo: | The basis to high production per area in maize is directly related to the success of the establishment of an adequate plant stand, which in turn depends on rational management and the quality of seeds. The increase in the demand of maize seeds of high physiological and genetic quality has been gradual, and has had a major impact on the improvement of yields. To preserve the genetic and physiological potential of a cultivar when producing seed, it is essential to understand all features associated to seed maturation. Thus, this work had the objective to identify the best harvest time starting at the appearance of the black layer for 7 ancestries and 5 hybrids of maize. The experiment was installed in the seed production area of the KSP Seed Research Company Ltd. township of Campos Novos, SC. The establishment of all treatments followed the technical guidelines indicated for the maize crop. The first harvest initiated at the appearance of the black layer stage for each genotype. Subsequent harvest treatments were performed at 10, 20, 30, 40 and 50 days after the formation of the black layer. The seed moisture content was determined for each harvest date, after which the seeds were dried still in the spike. After being dried, the seeds were threshed and stored in cold and dry chamber, at a mean temperature of 12ºC and 52%relative humidity, until being analyzed. For the evaluation of the physiological quality of the seeds, the tests of germination and vigor were carried out. Considering the results, the best harvest time for all treatments was that of 10 days after the appearance of the black layer. Environmental effects have a great impact on the seed physiological quality, especially when the harvest and rainy seasons coincide. Extremely early harvests will cause the seeds to show lower vigor when sown shortly after drying. It is suggested that the harvest be executed 10 days after the physiological maturity. The loss of seed moisture while still in the field is slow, contributing to the deterioration of their physiological quality whenever harvest is retarded beyond the period of 10 days after the physiological maturity is reached. |
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Konflanz, Valmor Antoniohttp://lattes.cnpq.br/9127295317075752http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4790093Y9Barros, Antônio Carlos Souza Albuquerquehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781024Z1Tillmann, Maria Angela Andréhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783469Y0Zimmer, Paulo Dejalma2014-08-20T13:44:37Z2007-10-292014-08-20T13:44:37Z2005-11-11KONFLANZ, Valmor Antonio. Time of harvest and physiological quality of seeds from maize ancestries and hybrids. 2005. 32 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2005.http://repositorio.ufpel.edu.br/handle/ri/1442The basis to high production per area in maize is directly related to the success of the establishment of an adequate plant stand, which in turn depends on rational management and the quality of seeds. The increase in the demand of maize seeds of high physiological and genetic quality has been gradual, and has had a major impact on the improvement of yields. To preserve the genetic and physiological potential of a cultivar when producing seed, it is essential to understand all features associated to seed maturation. Thus, this work had the objective to identify the best harvest time starting at the appearance of the black layer for 7 ancestries and 5 hybrids of maize. The experiment was installed in the seed production area of the KSP Seed Research Company Ltd. township of Campos Novos, SC. The establishment of all treatments followed the technical guidelines indicated for the maize crop. The first harvest initiated at the appearance of the black layer stage for each genotype. Subsequent harvest treatments were performed at 10, 20, 30, 40 and 50 days after the formation of the black layer. The seed moisture content was determined for each harvest date, after which the seeds were dried still in the spike. After being dried, the seeds were threshed and stored in cold and dry chamber, at a mean temperature of 12ºC and 52%relative humidity, until being analyzed. For the evaluation of the physiological quality of the seeds, the tests of germination and vigor were carried out. Considering the results, the best harvest time for all treatments was that of 10 days after the appearance of the black layer. Environmental effects have a great impact on the seed physiological quality, especially when the harvest and rainy seasons coincide. Extremely early harvests will cause the seeds to show lower vigor when sown shortly after drying. It is suggested that the harvest be executed 10 days after the physiological maturity. The loss of seed moisture while still in the field is slow, contributing to the deterioration of their physiological quality whenever harvest is retarded beyond the period of 10 days after the physiological maturity is reached.A base da alta produção por área, principalmente da cultura do milho, está diretamente relacionada com o sucesso do estabelecimento das plantas no campo, que por sua vez, depende do manejo racional e da qualidade das sementes. O aumento da demanda de sementes de milho de alta qualidade fisiológica e genética tem sido gradual, e o grande responsável pelos incrementos na produção. Para que na produção de sementes seja preservado o máximo potencial genético e fisiológico de uma cultivar, é necessário conhecer o seu processo de maturação. Assim, este trabalho teve por objetivo identificar o melhor ponto de colheita a partir do surgimento da camada preta para 7 linhagens e 5 híbridos de milho. O experimento foi instalado na área de pesquisa da Empresa KSP Sementes e Pesquisas Ltda no Município de Campos Novos-SC, conforme as recomendações técnicas indicadas para a cultura. A primeira colheita foi no surgimento da camada preta para todos os genótipos. Após foram realizadas colheitas aos 10, 20, 30, 40 e 50 dias após a formação da camada preta e determinado o teor de água das amostras. As sementes foram secadas em espigas na medida em que foram sendo colhidas. Após a secagem foram debulhadas e armazenadas em câmara fria e seca, com temperatura média de 12ºC e umidade relativa de 52% até as avaliações. Para avaliação da qualidade fisiológica das sementes foram realizados os testes de germinação e vigor. Considerando os resultados encontrados o melhor ponto de colheita para os genótipos estudados tanto para as linhagens como para os híbridos foi aos 10 dias após o início do surgimento da camada preta. Efeitos do ambiente afetam a qualidade fisiológica das sementes no campo após a maturidade fisiológica, principalmente para colheitas logo após períodos de chuvas. Para semeaduras logo após a secagem das sementes, colheitas muito precoces podem acarretar em menores índices de vigor durante a germinação das sementes, sendo mais seguro para estas situações colheitas aos 10 dias após a maturidade fisiológica. A perda de umidade no campo é lenta, contribuindo para a deterioração das sementes no campo reduzindo a qualidade fisiológica à medida que há retardo na colheita a partir dos 10 dias após a maturidade fisiológica.application/pdfporUniversidade Federal de PelotasPrograma de Pós-Graduação em Ciência e Tecnologia de SementesUFPelBRFaculdade de Agronomia Eliseu MacielSementesZea maysMaturidade fisiológicaVigorGerminaçãoHíbridos de milhoPonto de colheitaSeedsZea mays L.Black layerHarvest timeCNPQ::CIENCIAS AGRARIAS::AGRONOMIAMomento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milhoTime of harvest and physiological quality of seeds from maize ancestries and hybridsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPel - Guaiacainstname:Universidade Federal de Pelotas (UFPEL)instacron:UFPELORIGINALdissertacao_valmor_konflanz.pdfapplication/pdf208272http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1442/1/dissertacao_valmor_konflanz.pdf44261cbcb3d4401aa4dbf2f9c4397c9cMD51open accessTEXTdissertacao_valmor_konflanz.pdf.txtdissertacao_valmor_konflanz.pdf.txtExtracted Texttext/plain48796http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1442/2/dissertacao_valmor_konflanz.pdf.txt296d22f3521d68b8e1a410019d071e62MD52open accessTHUMBNAILdissertacao_valmor_konflanz.pdf.jpgdissertacao_valmor_konflanz.pdf.jpgGenerated Thumbnailimage/jpeg1457http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/1442/3/dissertacao_valmor_konflanz.pdf.jpg6148e9b91e0c4ce990320ca78fefe027MD53open access123456789/14422018-09-27 17:29:15.955open accessoai:guaiaca.ufpel.edu.br:123456789/1442Repositório InstitucionalPUBhttp://repositorio.ufpel.edu.br/oai/requestrippel@ufpel.edu.br || repositorio@ufpel.edu.br || aline.batista@ufpel.edu.bropendoar:2018-09-27T20:29:15Repositório Institucional da UFPel - Guaiaca - Universidade Federal de Pelotas (UFPEL)false |
dc.title.por.fl_str_mv |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
dc.title.alternative.eng.fl_str_mv |
Time of harvest and physiological quality of seeds from maize ancestries and hybrids |
title |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
spellingShingle |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho Konflanz, Valmor Antonio Sementes Zea mays Maturidade fisiológica Vigor Germinação Híbridos de milho Ponto de colheita Seeds Zea mays L. Black layer Harvest time CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
title_full |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
title_fullStr |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
title_full_unstemmed |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
title_sort |
Momento de colheita e qualidade fisiológica de sementes de linhagens e híbridos de milho |
author |
Konflanz, Valmor Antonio |
author_facet |
Konflanz, Valmor Antonio |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/9127295317075752 |
dc.contributor.advisorLattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4790093Y9 |
dc.contributor.referees1.pt_BR.fl_str_mv |
Barros, Antônio Carlos Souza Albuquerque |
dc.contributor.referees1ID.por.fl_str_mv |
|
dc.contributor.referees1Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781024Z1 |
dc.contributor.referees2.pt_BR.fl_str_mv |
Tillmann, Maria Angela André |
dc.contributor.referees2ID.por.fl_str_mv |
|
dc.contributor.referees2Lattes.por.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783469Y0 |
dc.contributor.author.fl_str_mv |
Konflanz, Valmor Antonio |
dc.contributor.advisor1.fl_str_mv |
Zimmer, Paulo Dejalma |
contributor_str_mv |
Zimmer, Paulo Dejalma |
dc.subject.por.fl_str_mv |
Sementes Zea mays Maturidade fisiológica Vigor Germinação Híbridos de milho Ponto de colheita |
topic |
Sementes Zea mays Maturidade fisiológica Vigor Germinação Híbridos de milho Ponto de colheita Seeds Zea mays L. Black layer Harvest time CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Seeds Zea mays L. Black layer Harvest time |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
The basis to high production per area in maize is directly related to the success of the establishment of an adequate plant stand, which in turn depends on rational management and the quality of seeds. The increase in the demand of maize seeds of high physiological and genetic quality has been gradual, and has had a major impact on the improvement of yields. To preserve the genetic and physiological potential of a cultivar when producing seed, it is essential to understand all features associated to seed maturation. Thus, this work had the objective to identify the best harvest time starting at the appearance of the black layer for 7 ancestries and 5 hybrids of maize. The experiment was installed in the seed production area of the KSP Seed Research Company Ltd. township of Campos Novos, SC. The establishment of all treatments followed the technical guidelines indicated for the maize crop. The first harvest initiated at the appearance of the black layer stage for each genotype. Subsequent harvest treatments were performed at 10, 20, 30, 40 and 50 days after the formation of the black layer. The seed moisture content was determined for each harvest date, after which the seeds were dried still in the spike. After being dried, the seeds were threshed and stored in cold and dry chamber, at a mean temperature of 12ºC and 52%relative humidity, until being analyzed. For the evaluation of the physiological quality of the seeds, the tests of germination and vigor were carried out. Considering the results, the best harvest time for all treatments was that of 10 days after the appearance of the black layer. Environmental effects have a great impact on the seed physiological quality, especially when the harvest and rainy seasons coincide. Extremely early harvests will cause the seeds to show lower vigor when sown shortly after drying. It is suggested that the harvest be executed 10 days after the physiological maturity. The loss of seed moisture while still in the field is slow, contributing to the deterioration of their physiological quality whenever harvest is retarded beyond the period of 10 days after the physiological maturity is reached. |
publishDate |
2005 |
dc.date.issued.fl_str_mv |
2005-11-11 |
dc.date.available.fl_str_mv |
2007-10-29 2014-08-20T13:44:37Z |
dc.date.accessioned.fl_str_mv |
2014-08-20T13:44:37Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
KONFLANZ, Valmor Antonio. Time of harvest and physiological quality of seeds from maize ancestries and hybrids. 2005. 32 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2005. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufpel.edu.br/handle/ri/1442 |
identifier_str_mv |
KONFLANZ, Valmor Antonio. Time of harvest and physiological quality of seeds from maize ancestries and hybrids. 2005. 32 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Pelotas, Pelotas, 2005. |
url |
http://repositorio.ufpel.edu.br/handle/ri/1442 |
dc.language.iso.fl_str_mv |
por |
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por |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Pelotas |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Ciência e Tecnologia de Sementes |
dc.publisher.initials.fl_str_mv |
UFPel |
dc.publisher.country.fl_str_mv |
BR |
dc.publisher.department.fl_str_mv |
Faculdade de Agronomia Eliseu Maciel |
publisher.none.fl_str_mv |
Universidade Federal de Pelotas |
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