Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions

Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions

The effect of nitrogen fertilization on development of the Leaf Area Index (LAI) of the cultivars IAC 47 and CICA 4 was studied. Nitrogen increased the LAI in both cultivars due to its influence on the increment of the number of tillers and size of the leaves. The cultivar CICA 4 presented higher values of LAI due to its greater tillering capacity. Based on the Leaf Area Duration (LAD), CICA 4 showed a better response to the nitrogen fertilization (90 kg of N/ha) than IAC 47. The increment on LAD was 79% and 51,8% for the cultivars CICA 4 and IAC 47, respectively. This better response of LAD of cultivar CICA 4 reflected negatively in grain production due to occurrence of water deficiency. On the other hand, the leaf area developed by cultivar IAC 47 seems to have been adequate thereby contributing for the increase in production.

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Main Authors: Stone, Luis Fernando, Steinmetz, Sílvio
Format: Digital revista
Language:por
Published: Pesquisa Agropecuaria Brasileira 2014
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/16635
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spelling rev-pab-br-article-166352014-04-15T19:21:29Z Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions Índice de área foliar e adubação nitrogenada em arroz Stone, Luis Fernando Steinmetz, Sílvio net assimilation rate; leaf area index; leaf area duration; nitrogen fertilization; upland rice taxa de assimilação líquida; índice de área foliar; duração da área foliar; adubação nitrogenada; arroz de sequeiro The effect of nitrogen fertilization on development of the Leaf Area Index (LAI) of the cultivars IAC 47 and CICA 4 was studied. Nitrogen increased the LAI in both cultivars due to its influence on the increment of the number of tillers and size of the leaves. The cultivar CICA 4 presented higher values of LAI due to its greater tillering capacity. Based on the Leaf Area Duration (LAD), CICA 4 showed a better response to the nitrogen fertilization (90 kg of N/ha) than IAC 47. The increment on LAD was 79% and 51,8% for the cultivars CICA 4 and IAC 47, respectively. This better response of LAD of cultivar CICA 4 reflected negatively in grain production due to occurrence of water deficiency. On the other hand, the leaf area developed by cultivar IAC 47 seems to have been adequate thereby contributing for the increase in production. Foi estudada a influência do nitrogênio no desenvolvimento do índice de área foliar (IAF) das cultivares IAC 47 e CICA 4. O nitrogênio incrementou o IAF de ambas as cultivares por aumentar o número de perfilhos e a dimensão das folhas. A cultivar CICA 4 alcançou maiores valores de IAF, devido à sua maior capacidade de perfilhamento. Esta mesma cultivar respondeu melhor à adubação nitrogenada no tocante à duração da área foliar (DAF), pois apresentou um incremento de 79,0%, com a aplicação de 90 kg de N/ha, comparativamente aos de 51,8% de aumento verificado na IAC 47. Esta maior resposta da DAF, da cultivar CICA 4, refletiu negativamente na produção, devido à deficiência hídrica. Por outro lado, a área foliar desenvolvida pela cultivar IAC 47 parece ter sido adequada, contribuindo para o aumento da produção. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2014-04-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/16635 Pesquisa Agropecuaria Brasileira; v.14, n.1, jan. 1979; 25-28 Pesquisa Agropecuária Brasileira; v.14, n.1, jan. 1979; 25-28 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/16635/10938
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language por
format Digital
author Stone, Luis Fernando
Steinmetz, Sílvio
spellingShingle Stone, Luis Fernando
Steinmetz, Sílvio
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
author_facet Stone, Luis Fernando
Steinmetz, Sílvio
author_sort Stone, Luis Fernando
title Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
title_short Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
title_full Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
title_fullStr Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
title_full_unstemmed Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
title_sort nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
description The effect of nitrogen fertilization on development of the Leaf Area Index (LAI) of the cultivars IAC 47 and CICA 4 was studied. Nitrogen increased the LAI in both cultivars due to its influence on the increment of the number of tillers and size of the leaves. The cultivar CICA 4 presented higher values of LAI due to its greater tillering capacity. Based on the Leaf Area Duration (LAD), CICA 4 showed a better response to the nitrogen fertilization (90 kg of N/ha) than IAC 47. The increment on LAD was 79% and 51,8% for the cultivars CICA 4 and IAC 47, respectively. This better response of LAD of cultivar CICA 4 reflected negatively in grain production due to occurrence of water deficiency. On the other hand, the leaf area developed by cultivar IAC 47 seems to have been adequate thereby contributing for the increase in production.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2014
url https://seer.sct.embrapa.br/index.php/pab/article/view/16635
work_keys_str_mv AT stoneluisfernando nitrogenfertilizationontheleafareaindexoftworicecultivarsunderuplandconditions
AT steinmetzsilvio nitrogenfertilizationontheleafareaindexoftworicecultivarsunderuplandconditions
AT stoneluisfernando indicedeareafoliareadubacaonitrogenadaemarroz
AT steinmetzsilvio indicedeareafoliareadubacaonitrogenadaemarroz
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