Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva
Ano de defesa: | 2008 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | , |
Tipo de documento: | Tese |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Santa Maria
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Agronomia
|
Departamento: |
Agronomia
|
País: |
BR
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://repositorio.ufsm.br/handle/1/3168 |
Resumo: | The release of new cultivars and improvement in management practices is necessary to examine the time and nitrogen (N) rates to be applied to obtain high yields. Also there is little information about the effect of the N rate and stage (vegetative or reproductive) on the sensitivity of plants of rice to cold in the reproductive stage. For these reasons four experiments were installed two in field and two in a greenhouse with the objective of determining the effect of N rates and application timing on yield and on the susceptibility of rice plants to low temperature in the reproductive stage. The experiments were conducted in the 2006/2007 and 2007/2008 growing season at INIA Treinta y tres, Uruguay. The experimental design in greenhouse was completely randomized in a factorial experimental design (factor A: stages or rates of N application and B factor: treatment of temperature), with four replications. To study the effect of the time of application of N, The treatments were application of N (30 kg ha-1) in the stages V4, V5, V6, V7, V8, R0, R1 and control without N in topdress. To study the effect of rates were applied to the factor A 0, 23, 46 and 69 kg ha-1,in V4 stage and the same rates in R0 stage. For the factor B of the two experiments were carried out two treatments: with and without cold (cold with the plants were treated with 12.5°C for 7 hours in 4 nights when the collar of the flag leaf was at the same height as the collar of the leaf below). Treatments from the field experiments were the same for the factor A of the experiments in greenhouse later explained, in a randomized block design with four replications. In a greenhouse the spikelets sterility was not affected by the application of N in different stages or the rates applied when the plants were subjected to cold. The cold treatment caused a temporary effect on the SPAD index retarding panicle emergency and reducing the size of the panicle, but did not affect yield. In the rice grown in the area after three years of livestock the plants respond to low rates and times of application of N in yield and its components |
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2017-05-152017-05-152008-06-12LARROSA, Ramón Felipe Méndez. Rates and stages of nitrogen application in rice suscetibility to low temperature in reproductive stage. 2008. 77 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2008.http://repositorio.ufsm.br/handle/1/3168The release of new cultivars and improvement in management practices is necessary to examine the time and nitrogen (N) rates to be applied to obtain high yields. Also there is little information about the effect of the N rate and stage (vegetative or reproductive) on the sensitivity of plants of rice to cold in the reproductive stage. For these reasons four experiments were installed two in field and two in a greenhouse with the objective of determining the effect of N rates and application timing on yield and on the susceptibility of rice plants to low temperature in the reproductive stage. The experiments were conducted in the 2006/2007 and 2007/2008 growing season at INIA Treinta y tres, Uruguay. The experimental design in greenhouse was completely randomized in a factorial experimental design (factor A: stages or rates of N application and B factor: treatment of temperature), with four replications. To study the effect of the time of application of N, The treatments were application of N (30 kg ha-1) in the stages V4, V5, V6, V7, V8, R0, R1 and control without N in topdress. To study the effect of rates were applied to the factor A 0, 23, 46 and 69 kg ha-1,in V4 stage and the same rates in R0 stage. For the factor B of the two experiments were carried out two treatments: with and without cold (cold with the plants were treated with 12.5°C for 7 hours in 4 nights when the collar of the flag leaf was at the same height as the collar of the leaf below). Treatments from the field experiments were the same for the factor A of the experiments in greenhouse later explained, in a randomized block design with four replications. In a greenhouse the spikelets sterility was not affected by the application of N in different stages or the rates applied when the plants were subjected to cold. The cold treatment caused a temporary effect on the SPAD index retarding panicle emergency and reducing the size of the panicle, but did not affect yield. In the rice grown in the area after three years of livestock the plants respond to low rates and times of application of N in yield and its componentsA liberação de novas cultivares e a melhoria nas práticas de manejo fazem necessário estudar as épocas e doses de N a serem aplicadas para obter altas produtividades. Também existem poucas informações a respeito do efeito das aplicações de doses de nitrogênio (N) em diferentes estádios (vegetativos ou reprodutivos) sobre a sensibilidade das plantas de arroz quando submetidas ao frio na fase reprodutiva. Em vista disto, foram instalados quatro experimentos dois em campo e dois em casa de vegetação com o objetivo de determinar o efeito da época e a dose de aplicação de N sobre a produtividade e sobre a Susceptibilidade de plantas de arroz irrigado à temperatura baixa na fase reprodutiva. Os experimentos foram conduzidos no ano agrícola 2006/2007 e 2007/2008 na estação experimental do INIA Treinta y Três, Uruguai. O delineamento experimental utilizado em casa de vegetação foi o inteiramente casualizado em esquema bifatorial (fator A: estádios ou doses de aplicação de N e fator B: tratamento de temperatura), com quatro repetições. Para estudar o efeito da época de aplicação de N, os tratamentos do fator A foram aplicação de N (30 kg ha-1) nos estádios V4, V5, V6, V7, V8, R0, R1 e a testemunha sem N em cobertura. Para estudar o efeito de doses foram aplicados para o fator A 0, 23, 46 e 69 kg ha-1de N no estádio V4 e as mesmas doses no estádio R0 e uma testemunha sem N em cobertura nos dois estádios No fator B dos dois experimentos realizou-se dois tratamentos: com e sem frio (com frio as plantas foram submetidas com 12,5°C durante 7 horas em 4 noites seguidas quando o colar da folha bandeira ficou à mesma altura que o colar da folha anterior). O delineamento em campo foi de blocos ao acaso com quatro repetições. Os tratamentos foram de estádios ou doses de aplicação de N iguais aos dos experimentos em casa de vegetação Em casa de vegetação a esterilidade de espiguetas não é afetada pela aplicação de N em estádios diferentes, nem pelas doses aplicadas, em função dos tratamentos de frio a que as plantas foram submetidas. O tratamento de frio provoca um efeito temporário no índice SPAD atrasando a emergência de panículas e reduzindo o tamanho da panícula, mas não afeta a produtividade. Em campo o arroz cultivado em área após três anos de pecuária há baixa resposta às doses e épocas de aplicação de N em cobertura sobre a produtividade de grãos e seus componentes.application/pdfporUniversidade Federal de Santa MariaPrograma de Pós-Graduação em AgronomiaUFSMBRAgronomiaArroz irrigadoEstádios e doses de aplicação de NBaixa temperaturaÍndice SPADFlooded riceN application stagesRates of N applicationLow temperatureSPAD indexCNPQ::CIENCIAS AGRARIAS::AGRONOMIADoses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutivaRates and stages of nitrogen application in rice suscetibility to low temperature in reproductive stageinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisMarchezan, Eniohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793251A2Silva, Leandro Souza dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706291Y9Avila, Luis Antonio dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798488A5Larrosa, Ramón Felipe Méndez50010000000940030030030030039c1cd11-4600-4b36-82ee-615ea2c5c8f592ce8a1f-d44c-4559-870e-e608f9bcbaca429718e1-de80-4230-ac85-da1720079863da482e6c-7b9f-4eeb-95d0-828367d52eb0info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações do UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMORIGINALRAMONFELIPELARROSA.pdfapplication/pdf5062044http://repositorio.ufsm.br/bitstream/1/3168/1/RAMONFELIPELARROSA.pdf4d1048eb516e6cfb16e2b07a306acc28MD51TEXTRAMONFELIPELARROSA.pdf.txtRAMONFELIPELARROSA.pdf.txtExtracted texttext/plain146021http://repositorio.ufsm.br/bitstream/1/3168/2/RAMONFELIPELARROSA.pdf.txt3d4ceae2ed92e9473e4dec891a791980MD52THUMBNAILRAMONFELIPELARROSA.pdf.jpgRAMONFELIPELARROSA.pdf.jpgIM Thumbnailimage/jpeg5115http://repositorio.ufsm.br/bitstream/1/3168/3/RAMONFELIPELARROSA.pdf.jpg8b9ddb9ab89895f82db367fba9a120f1MD531/31682017-07-25 10:53:06.28oai:repositorio.ufsm.br:1/3168Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2017-07-25T13:53:06Biblioteca Digital de Teses e Dissertações do UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.por.fl_str_mv |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
dc.title.alternative.eng.fl_str_mv |
Rates and stages of nitrogen application in rice suscetibility to low temperature in reproductive stage |
title |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
spellingShingle |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva Larrosa, Ramón Felipe Méndez Arroz irrigado Estádios e doses de aplicação de N Baixa temperatura Índice SPAD Flooded rice N application stages Rates of N application Low temperature SPAD index CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
title_short |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
title_full |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
title_fullStr |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
title_full_unstemmed |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
title_sort |
Doses e épocas de aplicação de nitrogênio na suscetibilidade do arroz a temperatura baixa na fase reprodutiva |
author |
Larrosa, Ramón Felipe Méndez |
author_facet |
Larrosa, Ramón Felipe Méndez |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Marchezan, Enio |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4793251A2 |
dc.contributor.referee1.fl_str_mv |
Silva, Leandro Souza da |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4706291Y9 |
dc.contributor.referee2.fl_str_mv |
Avila, Luis Antonio de |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4798488A5 |
dc.contributor.author.fl_str_mv |
Larrosa, Ramón Felipe Méndez |
contributor_str_mv |
Marchezan, Enio Silva, Leandro Souza da Avila, Luis Antonio de |
dc.subject.por.fl_str_mv |
Arroz irrigado Estádios e doses de aplicação de N Baixa temperatura Índice SPAD |
topic |
Arroz irrigado Estádios e doses de aplicação de N Baixa temperatura Índice SPAD Flooded rice N application stages Rates of N application Low temperature SPAD index CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
dc.subject.eng.fl_str_mv |
Flooded rice N application stages Rates of N application Low temperature SPAD index |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS AGRARIAS::AGRONOMIA |
description |
The release of new cultivars and improvement in management practices is necessary to examine the time and nitrogen (N) rates to be applied to obtain high yields. Also there is little information about the effect of the N rate and stage (vegetative or reproductive) on the sensitivity of plants of rice to cold in the reproductive stage. For these reasons four experiments were installed two in field and two in a greenhouse with the objective of determining the effect of N rates and application timing on yield and on the susceptibility of rice plants to low temperature in the reproductive stage. The experiments were conducted in the 2006/2007 and 2007/2008 growing season at INIA Treinta y tres, Uruguay. The experimental design in greenhouse was completely randomized in a factorial experimental design (factor A: stages or rates of N application and B factor: treatment of temperature), with four replications. To study the effect of the time of application of N, The treatments were application of N (30 kg ha-1) in the stages V4, V5, V6, V7, V8, R0, R1 and control without N in topdress. To study the effect of rates were applied to the factor A 0, 23, 46 and 69 kg ha-1,in V4 stage and the same rates in R0 stage. For the factor B of the two experiments were carried out two treatments: with and without cold (cold with the plants were treated with 12.5°C for 7 hours in 4 nights when the collar of the flag leaf was at the same height as the collar of the leaf below). Treatments from the field experiments were the same for the factor A of the experiments in greenhouse later explained, in a randomized block design with four replications. In a greenhouse the spikelets sterility was not affected by the application of N in different stages or the rates applied when the plants were subjected to cold. The cold treatment caused a temporary effect on the SPAD index retarding panicle emergency and reducing the size of the panicle, but did not affect yield. In the rice grown in the area after three years of livestock the plants respond to low rates and times of application of N in yield and its components |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008-06-12 |
dc.date.accessioned.fl_str_mv |
2017-05-15 |
dc.date.available.fl_str_mv |
2017-05-15 |
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.citation.fl_str_mv |
LARROSA, Ramón Felipe Méndez. Rates and stages of nitrogen application in rice suscetibility to low temperature in reproductive stage. 2008. 77 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2008. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufsm.br/handle/1/3168 |
identifier_str_mv |
LARROSA, Ramón Felipe Méndez. Rates and stages of nitrogen application in rice suscetibility to low temperature in reproductive stage. 2008. 77 f. Tese (Doutorado em Agronomia) - Universidade Federal de Santa Maria, Santa Maria, 2008. |
url |
http://repositorio.ufsm.br/handle/1/3168 |
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Universidade Federal de Santa Maria |
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UFSM |
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Universidade Federal de Santa Maria |
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