Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo
Autor(a) principal: | |
---|---|
Data de Publicação: | 1997 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/9912 |
Resumo: | Upland rice presents great yield reductions when cultivated as a monocrop. This phenomenon is considered by traditional rice growers as a result of tired soils. The reasons for reduced grain production, however, may be of several causes (low soil fertility, diseases, pests, decline in organic matter content, etc.) but the most important of them emphasized in the related literature refers to the allelopatic reaction by the rice crop, mainly to the autotoxicity. The lack of knowledge about this subject in Brazil, has been the source of systematic economic damage. On one hand by continuous crop establishment in the same area for several years and, on the other, by returning the rice crop to the old area before allowing sufficient time to the soil to recuperate. Additionally, it is common, especially in the northern states, the traditional crop system of slash burn, on a migratory way to avoid soil sickness. This is a non sustainable and poluent way to explore the field. The objective of this study was to evaluate a representative germplasm of the japonica tropical rice for its tolerance to monocrop system and analyze the possibility to reduce the problem by breeding procedure. The tests were established in the three areas with different antecedents. System 1 - rice after four years of maize; System 2 – two years of rice after three years of maize; System 3 – Four years of rice (monocrop) after one year of maize. The 95 genotypes tested were divided into three groups: Group 1- 17 commercial varieties; Group 2 – 17 traditional varieties; Group 3 – 61 advanced lines. Highly significant differences were observed among the systems, with a decline in production of 43% due to monocrop on its most severe condition (system 3). The commercial varieties yielded as much as the advanced lines, but 47,34% and 32,88% more than traditional ones, respectively on systems 1 and 3. The monocrop system increased plant cycle up to one week, on the average, and reduced plant height in 11 cm. The observed differences among and within genotype groups, as well as its interactions with the crop systems show the existence of genetic variability and the genotypes do not react to monocrop on the same way. With the average heritability among groups of 0,67 and with a selection intensity of 30% it was possible to estimate an average gain of 24,4% on the system 3. These genetic parameters show the possibility to attain a better agronomic behavior of rice in monocrop through breeding approach. |
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Castro, Emílio da Maia dehttp://lattes.cnpq.br/9727201714596831Castro, Emílio da Maia deChaves, Lázaro JoséSoares, Antônio Alveshttp://lattes.cnpq.br/7706447622391615Costa, Sílvia Sobral2019-08-07T11:31:02Z1997-12-19COSTA, Sílvia Sobral. Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo. 1997. 73 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 1997.http://repositorio.bc.ufg.br/tede/handle/tede/9912ark:/38995/0013000006z6gUpland rice presents great yield reductions when cultivated as a monocrop. This phenomenon is considered by traditional rice growers as a result of tired soils. The reasons for reduced grain production, however, may be of several causes (low soil fertility, diseases, pests, decline in organic matter content, etc.) but the most important of them emphasized in the related literature refers to the allelopatic reaction by the rice crop, mainly to the autotoxicity. The lack of knowledge about this subject in Brazil, has been the source of systematic economic damage. On one hand by continuous crop establishment in the same area for several years and, on the other, by returning the rice crop to the old area before allowing sufficient time to the soil to recuperate. Additionally, it is common, especially in the northern states, the traditional crop system of slash burn, on a migratory way to avoid soil sickness. This is a non sustainable and poluent way to explore the field. The objective of this study was to evaluate a representative germplasm of the japonica tropical rice for its tolerance to monocrop system and analyze the possibility to reduce the problem by breeding procedure. The tests were established in the three areas with different antecedents. System 1 - rice after four years of maize; System 2 – two years of rice after three years of maize; System 3 – Four years of rice (monocrop) after one year of maize. The 95 genotypes tested were divided into three groups: Group 1- 17 commercial varieties; Group 2 – 17 traditional varieties; Group 3 – 61 advanced lines. Highly significant differences were observed among the systems, with a decline in production of 43% due to monocrop on its most severe condition (system 3). The commercial varieties yielded as much as the advanced lines, but 47,34% and 32,88% more than traditional ones, respectively on systems 1 and 3. The monocrop system increased plant cycle up to one week, on the average, and reduced plant height in 11 cm. The observed differences among and within genotype groups, as well as its interactions with the crop systems show the existence of genetic variability and the genotypes do not react to monocrop on the same way. With the average heritability among groups of 0,67 and with a selection intensity of 30% it was possible to estimate an average gain of 24,4% on the system 3. These genetic parameters show the possibility to attain a better agronomic behavior of rice in monocrop through breeding approach.O arroz de terras altas apresenta uma queda severa de produção de grãos quando plantado sucessivamente na mesma área. As causas deste declínio podem ser variadas, mas a literatura tem apontado como componente mais importante as relações alelopáticas do arroz, em especial a autotoxidez. Este trabalho tem como objetivo avaliar um grupo representativo do germoplasma brasileiro do arroz japônica tropical em relação a sua tolerância aos efeitos do plantio sucessivo na mesma área, e avaliar a possibilidade de atenuar este problema via melhoramento genético. Para tanto instalou-se ensaios experimentais em três áreas com diferentes históricos de cultivo: Sistema 1: primeiro ano de arroz após quatro anos de plantio de milho; Sistema 2: segundo ano de arroz após três anos de plantio de milho; Sistema 3: quarto ano de arroz após um ano de milho. Foram utilizadas 95 cultivares/linhagens de arroz japônica tropical (17 cultivares comerciais; 17 cultivares tradicionais; 61 linhagens). As diferenças entre os sistemas foram altamente significativas com uma redução média de 43% na produção de grãos devido ao monocultivo na condição mais severa (sistema 3). As cultivares comerciais produziram, na média, tanto quanto as linhagens, porém 47,34% e 32,88% a mais que as tradicionais nos sistemas 1 e 3, respectivamente. O plantio sucessivo na mesma área (sistema 3) alongou o ciclo das plantas em uma semana e reduziu sua altura em 11 cm. As diferenças observadas entre e dentro de grupos bem como sua interação com os três sistemas demonstram haver variabilidade genética e que os genótipos não reagem ao monocultivo de maneira semelhante. Com a herdabilidade média entre os grupos de 0,67 e uma intensidade de seleção de 30% foi possível estimar ganhos médios de 24,45% entre os genótipos no sistema de plantios sucessivos. Esses parâmetros genéticos demonstram a possibilidade de, através do melhoramento genético, obter-se cultivares com melhor desempenho nas condições de plantio sucessivo.Submitted by Liliane Ferreira (ljuvencia30@gmail.com) on 2019-08-07T11:15:52Z No. of bitstreams: 2 Dissertação - Sílvia Sobral Costa - 1997.pdf: 1272330 bytes, checksum: 75f2a129ccba2470c715f521cef740d9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2019-08-07T11:31:02Z (GMT) No. of bitstreams: 2 Dissertação - Sílvia Sobral Costa - 1997.pdf: 1272330 bytes, checksum: 75f2a129ccba2470c715f521cef740d9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)Made available in DSpace on 2019-08-07T11:31:02Z (GMT). No. of bitstreams: 2 Dissertação - Sílvia Sobral Costa - 1997.pdf: 1272330 bytes, checksum: 75f2a129ccba2470c715f521cef740d9 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 1997-12-19application/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Agronomia (EA)UFGBrasilEscola de Agronomia - EA (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessArroz (Oryza sativa L.)Tolerância ao monocultivoUpland rice (Oryza sativa L.)Tolerance to grain production decline due to monocropCIENCIAS AGRARIAS::AGRONOMIATolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivoUpland rice (Oryza sativa L.) tolerance to grain production decline due to monocropinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-5756624928798959431600600600-6046953723502374070-3091138714907603907reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.eng.fl_str_mv |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
dc.title.alternative.eng.fl_str_mv |
Upland rice (Oryza sativa L.) tolerance to grain production decline due to monocrop |
title |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
spellingShingle |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo Costa, Sílvia Sobral Arroz (Oryza sativa L.) Tolerância ao monocultivo Upland rice (Oryza sativa L.) Tolerance to grain production decline due to monocrop CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
title_full |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
title_fullStr |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
title_full_unstemmed |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
title_sort |
Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo |
author |
Costa, Sílvia Sobral |
author_facet |
Costa, Sílvia Sobral |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Castro, Emílio da Maia de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9727201714596831 |
dc.contributor.referee1.fl_str_mv |
Castro, Emílio da Maia de |
dc.contributor.referee2.fl_str_mv |
Chaves, Lázaro José |
dc.contributor.referee3.fl_str_mv |
Soares, Antônio Alves |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/7706447622391615 |
dc.contributor.author.fl_str_mv |
Costa, Sílvia Sobral |
contributor_str_mv |
Castro, Emílio da Maia de Castro, Emílio da Maia de Chaves, Lázaro José Soares, Antônio Alves |
dc.subject.por.fl_str_mv |
Arroz (Oryza sativa L.) Tolerância ao monocultivo |
topic |
Arroz (Oryza sativa L.) Tolerância ao monocultivo Upland rice (Oryza sativa L.) Tolerance to grain production decline due to monocrop CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Upland rice (Oryza sativa L.) Tolerance to grain production decline due to monocrop |
dc.subject.cnpq.fl_str_mv |
CIENCIAS AGRARIAS::AGRONOMIA |
description |
Upland rice presents great yield reductions when cultivated as a monocrop. This phenomenon is considered by traditional rice growers as a result of tired soils. The reasons for reduced grain production, however, may be of several causes (low soil fertility, diseases, pests, decline in organic matter content, etc.) but the most important of them emphasized in the related literature refers to the allelopatic reaction by the rice crop, mainly to the autotoxicity. The lack of knowledge about this subject in Brazil, has been the source of systematic economic damage. On one hand by continuous crop establishment in the same area for several years and, on the other, by returning the rice crop to the old area before allowing sufficient time to the soil to recuperate. Additionally, it is common, especially in the northern states, the traditional crop system of slash burn, on a migratory way to avoid soil sickness. This is a non sustainable and poluent way to explore the field. The objective of this study was to evaluate a representative germplasm of the japonica tropical rice for its tolerance to monocrop system and analyze the possibility to reduce the problem by breeding procedure. The tests were established in the three areas with different antecedents. System 1 - rice after four years of maize; System 2 – two years of rice after three years of maize; System 3 – Four years of rice (monocrop) after one year of maize. The 95 genotypes tested were divided into three groups: Group 1- 17 commercial varieties; Group 2 – 17 traditional varieties; Group 3 – 61 advanced lines. Highly significant differences were observed among the systems, with a decline in production of 43% due to monocrop on its most severe condition (system 3). The commercial varieties yielded as much as the advanced lines, but 47,34% and 32,88% more than traditional ones, respectively on systems 1 and 3. The monocrop system increased plant cycle up to one week, on the average, and reduced plant height in 11 cm. The observed differences among and within genotype groups, as well as its interactions with the crop systems show the existence of genetic variability and the genotypes do not react to monocrop on the same way. With the average heritability among groups of 0,67 and with a selection intensity of 30% it was possible to estimate an average gain of 24,4% on the system 3. These genetic parameters show the possibility to attain a better agronomic behavior of rice in monocrop through breeding approach. |
publishDate |
1997 |
dc.date.issued.fl_str_mv |
1997-12-19 |
dc.date.accessioned.fl_str_mv |
2019-08-07T11:31:02Z |
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 |
COSTA, Sílvia Sobral. Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo. 1997. 73 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 1997. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/9912 |
dc.identifier.dark.fl_str_mv |
ark:/38995/0013000006z6g |
identifier_str_mv |
COSTA, Sílvia Sobral. Tolerância do arroz de terras altas (Oryza sativa L.) ao declínio da produção de grãos causado por seu monocultivo. 1997. 73 f. Dissertação (Mestrado em Agronomia) - Universidade Federal de Goiás, Goiânia, 1997. ark:/38995/0013000006z6g |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/9912 |
dc.language.iso.fl_str_mv |
por |
language |
por |
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dc.relation.confidence.fl_str_mv |
600 600 600 |
dc.relation.department.fl_str_mv |
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dc.relation.cnpq.fl_str_mv |
-3091138714907603907 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
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dc.publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.publisher.program.fl_str_mv |
Programa de Pós-graduação em Agronomia (EA) |
dc.publisher.initials.fl_str_mv |
UFG |
dc.publisher.country.fl_str_mv |
Brasil |
dc.publisher.department.fl_str_mv |
Escola de Agronomia - EA (RG) |
publisher.none.fl_str_mv |
Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
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Repositório Institucional da UFG |
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bd3efa91386c1718a7f26a329fdcb468 4afdbb8c545fd630ea7db775da747b2f d41d8cd98f00b204e9800998ecf8427e d41d8cd98f00b204e9800998ecf8427e 75f2a129ccba2470c715f521cef740d9 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFG - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
tasesdissertacoes.bc@ufg.br |
_version_ |
1811721425101258752 |