Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
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/16566 |
Resumo: | During the 1978/1979 agricultural season a research was carried out in two "cerrado" oxisols: LVE (Typic Haplustox) and LVA (Haplustox-Acrustox) having the following covers: bare soil, rice (Oryza sativa L., cv. IAC-25), corn (Zea mays L., cv. C-111X) soybean (Glycine max L., cv. UFV-1), to conduct observations on the field water regimes under wet and dry conditions taking place throughout the crop growing season. Results show that available water in the 0.1 - 1.0 bar range was 11 and 13% (% dry weight) for the LVE and LVA soil respectively. Soil matric potencial from 5 to 115 cm depth ranged from 0.1 to 0.3 bars during the rainy season, with no great influence of the soil cover. Crop growth was not affected by conditions resulting from prolongued high soil matric potential. During the drought period (20/2 – 5/3) the greater variations in soil matric potentials were observed in the upper 5 cm (bare soils), due to soil water evaporation. This effect was much greater in the LVE soil than in the LVA soil. Water extraction by rice, corn and soybean crops in the LVE soil extended down to 45, 60 and 115 cm, respectively which explains the sensitivity to drought shown by rice crops and drought tolerance shown by soybean crops. Evapotranspiration during the drought period were the following: LVE soil, rice cover = 3.69 mm/day; LVE soil, corn = 4.27 mm/day; LVE soil, soybean cover = 5.31 mm/day. Water uptake in the upper soil 30 cm was: rice>soybean = corn and below the 30 cm depth was: soybean>corn>rice. |
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Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVAVariação do regime hídrico em dois solos sob cerrados LVE e LVA em função da cobertura vegetalfield water regime; oxisols; "cerrados"; crop cover; evapotranspiration; matric potential; irrigationregime hídrico; oxissolos; Cerrados; evapotranspiração; cobertura vegetal; potencial matricial; irrigaçãoDuring the 1978/1979 agricultural season a research was carried out in two "cerrado" oxisols: LVE (Typic Haplustox) and LVA (Haplustox-Acrustox) having the following covers: bare soil, rice (Oryza sativa L., cv. IAC-25), corn (Zea mays L., cv. C-111X) soybean (Glycine max L., cv. UFV-1), to conduct observations on the field water regimes under wet and dry conditions taking place throughout the crop growing season. Results show that available water in the 0.1 - 1.0 bar range was 11 and 13% (% dry weight) for the LVE and LVA soil respectively. Soil matric potencial from 5 to 115 cm depth ranged from 0.1 to 0.3 bars during the rainy season, with no great influence of the soil cover. Crop growth was not affected by conditions resulting from prolongued high soil matric potential. During the drought period (20/2 – 5/3) the greater variations in soil matric potentials were observed in the upper 5 cm (bare soils), due to soil water evaporation. This effect was much greater in the LVE soil than in the LVA soil. Water extraction by rice, corn and soybean crops in the LVE soil extended down to 45, 60 and 115 cm, respectively which explains the sensitivity to drought shown by rice crops and drought tolerance shown by soybean crops. Evapotranspiration during the drought period were the following: LVE soil, rice cover = 3.69 mm/day; LVE soil, corn = 4.27 mm/day; LVE soil, soybean cover = 5.31 mm/day. Water uptake in the upper soil 30 cm was: rice>soybean = corn and below the 30 cm depth was: soybean>corn>rice.No ano agrícola 1978/1979, foi realizado um estudo dos solos LVE (Haplustox) e LVA (Haplustox-Acrustox) com solo nu e as seguintes coberturas vegetais: arroz (Oryza sativa L., cv. IAC-25), milho (Zea mays L., cv. Cargill-111X) e soja (Glycine max L. cv. UFV-1), visando ao conhecimento do regime hídrico dos solos em condições de chuva e seca observado nos Cerrados durante o ciclo vegetativo da cultura. Os resultados indicam que a água disponível do solo na faixa 0,1 - 1,0 bar foi de 11 a 13% (% em peso) no caso do LVE e LVA, respectivamente. Os potenciais matriciais de água no solo na profundidade de 5 até 115 cm variaram entre 0,1 e 0,3 bars durante o período chuvoso e não foram influenciados pela cobertura vegetal. O desenvolvimento das culturas não foi efetuado pelas condições resultantes do alto nível de umidade do solo. Durante o período de seca de 20/2 - 5/3 as máximas variações nos potenciais matriciais foram observadas nos primeiros 5 cm do solo nu, devido a evaporação direta da água do solo. Este efeito foi bem maior no solo LVE que no solo LVA. A extração de água no caso do solo LVE coberto com arroz, milho e soja se estendeu até 45 cm, 60 cm e 115 cm respectivamente, o que explica a maior sensibilidade à seca do arroz e a maior tolerância da soja. A evaporação durante o período da seca foi LVE, arroz = 3,69; LVE, milho = 4,27 e LVE, soja = 5,31 mm/dia. A ordem de extração de água nos primeiros 30 cm de solo (LVF) foi: arroz >soja = milho e abaixo dos 30 cm a extração de água foi: soja>milho>arroz.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraEspinoza, WaldoAzevedo, Juscelino A. deReis, A. Eduardo G. dos2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16566Pesquisa Agropecuaria Brasileira; v.15, n.3, mar. 1980; 283-295Pesquisa Agropecuária Brasileira; v.15, n.3, mar. 1980; 283-2951678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16566/10841info:eu-repo/semantics/openAccess2014-04-15T19:32:36Zoai:ojs.seer.sct.embrapa.br:article/16566Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T19:32:36Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA Variação do regime hídrico em dois solos sob cerrados LVE e LVA em função da cobertura vegetal |
title |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA |
spellingShingle |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA Espinoza, Waldo field water regime; oxisols; "cerrados"; crop cover; evapotranspiration; matric potential; irrigation regime hídrico; oxissolos; Cerrados; evapotranspiração; cobertura vegetal; potencial matricial; irrigação |
title_short |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA |
title_full |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA |
title_fullStr |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA |
title_full_unstemmed |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA |
title_sort |
Influence of soil cover on the field moisture regimes of two "cerrado" oxisols: LVE and LVA |
author |
Espinoza, Waldo |
author_facet |
Espinoza, Waldo Azevedo, Juscelino A. de Reis, A. Eduardo G. dos |
author_role |
author |
author2 |
Azevedo, Juscelino A. de Reis, A. Eduardo G. dos |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Espinoza, Waldo Azevedo, Juscelino A. de Reis, A. Eduardo G. dos |
dc.subject.por.fl_str_mv |
field water regime; oxisols; "cerrados"; crop cover; evapotranspiration; matric potential; irrigation regime hídrico; oxissolos; Cerrados; evapotranspiração; cobertura vegetal; potencial matricial; irrigação |
topic |
field water regime; oxisols; "cerrados"; crop cover; evapotranspiration; matric potential; irrigation regime hídrico; oxissolos; Cerrados; evapotranspiração; cobertura vegetal; potencial matricial; irrigação |
description |
During the 1978/1979 agricultural season a research was carried out in two "cerrado" oxisols: LVE (Typic Haplustox) and LVA (Haplustox-Acrustox) having the following covers: bare soil, rice (Oryza sativa L., cv. IAC-25), corn (Zea mays L., cv. C-111X) soybean (Glycine max L., cv. UFV-1), to conduct observations on the field water regimes under wet and dry conditions taking place throughout the crop growing season. Results show that available water in the 0.1 - 1.0 bar range was 11 and 13% (% dry weight) for the LVE and LVA soil respectively. Soil matric potencial from 5 to 115 cm depth ranged from 0.1 to 0.3 bars during the rainy season, with no great influence of the soil cover. Crop growth was not affected by conditions resulting from prolongued high soil matric potential. During the drought period (20/2 – 5/3) the greater variations in soil matric potentials were observed in the upper 5 cm (bare soils), due to soil water evaporation. This effect was much greater in the LVE soil than in the LVA soil. Water extraction by rice, corn and soybean crops in the LVE soil extended down to 45, 60 and 115 cm, respectively which explains the sensitivity to drought shown by rice crops and drought tolerance shown by soybean crops. Evapotranspiration during the drought period were the following: LVE soil, rice cover = 3.69 mm/day; LVE soil, corn = 4.27 mm/day; LVE soil, soybean cover = 5.31 mm/day. Water uptake in the upper soil 30 cm was: rice>soybean = corn and below the 30 cm depth was: soybean>corn>rice. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-15 |
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/16566 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16566 |
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/16566/10841 |
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.15, n.3, mar. 1980; 283-295 Pesquisa Agropecuária Brasileira; v.15, n.3, mar. 1980; 283-295 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 |
_version_ |
1793416659918127104 |