Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/15692 |
Resumo: | During the dry season of 1979 and 1980, the response of twelve soybean cultivars to water deficit was studied at the Cerrados Research Center, Planaltina, DF, Brazil. The plants were exposed to a dry spell at flowering stage. During 1979, irrigation of the cultivars was suspended for 27 days (128 mm tank A evaporation) and during 1980 irrigation was suspended for 36 days (245.8 mm tank A evaporation). Yield response indicates that the cultivars can be classified into three groups. a) Resistant to water stress; b) intermediate and c) non resistant. Best results were obtained with cultivars Doko and Cristalina. During 1979 and 1980, under permanent irrigation, Doko cv. Yields were 4,194 and 3,079 kg/ha, respectively; and under water stress, yields were 2,452 and 1,482 kg/ha, respectively. During 1980, Cristalina cv. yields were 2,254 kg/ha under permanent irrigation and 1,497 kg/ha under water stress conditions. Leaf area index (LAI) was greatly reduced by water stress but it was not clearly associated to cultivar response. 75 to 85% of soybean roots were distributed in the upper 20 cm of soil profile. Stress resistant cultivars showed higher root density in the upper 20 cm of the soil profile than the stress non-resistant cultivars. Root density showed by cultivars with or without permanent irrigation was not different, which suggests that this parameter is not sensible enough to study plant response to phe phenomena. |
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Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root developmentResposta de doze cultivares de soja ao déficit hídrico num Latossolo Vermelho-Escuro de Cerrados do Distrito Federal. I - Rendimentos, área foliar e desenvolvimento radicularirrigation; root density; leaf area indexirrigação; índice de área foliar; desenvolvimento radicularDuring the dry season of 1979 and 1980, the response of twelve soybean cultivars to water deficit was studied at the Cerrados Research Center, Planaltina, DF, Brazil. The plants were exposed to a dry spell at flowering stage. During 1979, irrigation of the cultivars was suspended for 27 days (128 mm tank A evaporation) and during 1980 irrigation was suspended for 36 days (245.8 mm tank A evaporation). Yield response indicates that the cultivars can be classified into three groups. a) Resistant to water stress; b) intermediate and c) non resistant. Best results were obtained with cultivars Doko and Cristalina. During 1979 and 1980, under permanent irrigation, Doko cv. Yields were 4,194 and 3,079 kg/ha, respectively; and under water stress, yields were 2,452 and 1,482 kg/ha, respectively. During 1980, Cristalina cv. yields were 2,254 kg/ha under permanent irrigation and 1,497 kg/ha under water stress conditions. Leaf area index (LAI) was greatly reduced by water stress but it was not clearly associated to cultivar response. 75 to 85% of soybean roots were distributed in the upper 20 cm of soil profile. Stress resistant cultivars showed higher root density in the upper 20 cm of the soil profile than the stress non-resistant cultivars. Root density showed by cultivars with or without permanent irrigation was not different, which suggests that this parameter is not sensible enough to study plant response to phe phenomena.Durante as épocas secas de 1979 e 1980 foi comparada, no Centro de Pesquisa Agropecuária dos Cerrados, CPAC, EMBRAPA, Planaltina, DF, a resposta de doze cultivares ou linhagens de soja ao déficit hídrico induzido a partir da época de floração. Durante 1979, as cultivares foram submetidas a um déficit hídrico de 27 dias sem irrigação (128 mm evaporação tanque A) e, durante 1980, a 36 dias (245,8 mm evaporação tanque A). Os resultados obtidos até agora permitem separar as cultivares em três grupos: a) resistentes ao déficit hídrico; b) intermédias; c) não resistentes ao déficit hídrico. Nos dois anos, os melhores resultados foram obtidos com as cultivares Doko e Cristalina. Durante 1979 e 1980, sob irrigação permanente, a cultivar Doko atingiu 4.194 e 3.079 kg/ha, respectivamente, e sob déficit hídrico, 2.452 e 1.482 kg/ha. No ano de 1980, a cultivar Cristalina atingiu 2.254 kg/ha sob irrigação permanente e 1.497 kg/ha sob condições de seca. O índice de área foliar (AIF) foi grandemente reduzido pelo déficit hídrico, mas não parece estar diretamente relacionado com a resposta da cultura ao déficit hídrico. No caso do desenvolvimento radicular, observa-se que 75-85% das raízes se acumulam nos primeiros 20 cm de solo. A diferença entre cultivares resistentes e não-resistentes à seca somente se manifestou na maior densidade radicular mostrada pelas cultivares resistentes, na primeira profundidade do solo. Em geral, não se observou diferença em densidade radicular para uma mesma cultivar submetida ou não a deficiência hídrica. Isto sugere que a densidade radicular não seria um parâmetro sensível para estudar a resposta da planta ao fenômeno.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraEspinoza, Waldo2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15692Pesquisa Agropecuaria Brasileira; v.17, n.3, mar. 1982; 447-458Pesquisa Agropecuária Brasileira; v.17, n.3, mar. 1982; 447-4581678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15692/9699info:eu-repo/semantics/openAccess2014-04-16T12:34:35Zoai:ojs.seer.sct.embrapa.br:article/15692Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T12:34:35Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development Resposta de doze cultivares de soja ao déficit hídrico num Latossolo Vermelho-Escuro de Cerrados do Distrito Federal. I - Rendimentos, área foliar e desenvolvimento radicular |
title |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development |
spellingShingle |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development Espinoza, Waldo irrigation; root density; leaf area index irrigação; índice de área foliar; desenvolvimento radicular |
title_short |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development |
title_full |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development |
title_fullStr |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development |
title_full_unstemmed |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development |
title_sort |
Response of twelve soybean cultivars to water deficit in a Cerrados Dark-Red Latosol of the Federal District. I. Yield, leaf area and root development |
author |
Espinoza, Waldo |
author_facet |
Espinoza, Waldo |
author_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Espinoza, Waldo |
dc.subject.por.fl_str_mv |
irrigation; root density; leaf area index irrigação; índice de área foliar; desenvolvimento radicular |
topic |
irrigation; root density; leaf area index irrigação; índice de área foliar; desenvolvimento radicular |
description |
During the dry season of 1979 and 1980, the response of twelve soybean cultivars to water deficit was studied at the Cerrados Research Center, Planaltina, DF, Brazil. The plants were exposed to a dry spell at flowering stage. During 1979, irrigation of the cultivars was suspended for 27 days (128 mm tank A evaporation) and during 1980 irrigation was suspended for 36 days (245.8 mm tank A evaporation). Yield response indicates that the cultivars can be classified into three groups. a) Resistant to water stress; b) intermediate and c) non resistant. Best results were obtained with cultivars Doko and Cristalina. During 1979 and 1980, under permanent irrigation, Doko cv. Yields were 4,194 and 3,079 kg/ha, respectively; and under water stress, yields were 2,452 and 1,482 kg/ha, respectively. During 1980, Cristalina cv. yields were 2,254 kg/ha under permanent irrigation and 1,497 kg/ha under water stress conditions. Leaf area index (LAI) was greatly reduced by water stress but it was not clearly associated to cultivar response. 75 to 85% of soybean roots were distributed in the upper 20 cm of soil profile. Stress resistant cultivars showed higher root density in the upper 20 cm of the soil profile than the stress non-resistant cultivars. Root density showed by cultivars with or without permanent irrigation was not different, which suggests that this parameter is not sensible enough to study plant response to phe phenomena. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-16 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15692 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/15692 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15692/9699 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.17, n.3, mar. 1982; 447-458 Pesquisa Agropecuária Brasileira; v.17, n.3, mar. 1982; 447-458 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416658990137344 |