Hemispherical photography to estimate biophysical variables of cotton.
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1066084 |
Resumo: | The Leaf Area Index (LAI) is a key parameter to evaluate the vegetation spectral response, estimating plant nutrition and water requirements. However, in large fields is difficult to obtain accurate data to LAI determination. Therefore, the objective of this study was the estimation of LAI, biomass and yield of irrigated cotton through digital hemispherical photography. The treatments consisted of four nitrogen doses (0, 90, 180 and 270 kg ha-1) and four phosphorus doses (0, 120, 240 and 360 kg ha-1). Digital hemispherical photographs were collected under similar sky brightness conditions at 60 and 75 days after emergence (DAE), performed by the Digital Plant Canopy Imager - CI-110® of CID Inc. Biomass and LAI measurements were made on the same dates. LAI was also determined by destructive and non-destructive methods through a leaf area integrator (LI-COR® -LI-3100C model), and by measurements based on the midrib length of all leaves, respectively. The results indicate that the hemispherical images were appropriate to estimate the LAI and biomass production of irrigated cotton, while for the estimation of yield, more research is needed to improve the method. |
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Hemispherical photography to estimate biophysical variables of cotton.AlgodãoBiomassaCottonBiomassThe Leaf Area Index (LAI) is a key parameter to evaluate the vegetation spectral response, estimating plant nutrition and water requirements. However, in large fields is difficult to obtain accurate data to LAI determination. Therefore, the objective of this study was the estimation of LAI, biomass and yield of irrigated cotton through digital hemispherical photography. The treatments consisted of four nitrogen doses (0, 90, 180 and 270 kg ha-1) and four phosphorus doses (0, 120, 240 and 360 kg ha-1). Digital hemispherical photographs were collected under similar sky brightness conditions at 60 and 75 days after emergence (DAE), performed by the Digital Plant Canopy Imager - CI-110® of CID Inc. Biomass and LAI measurements were made on the same dates. LAI was also determined by destructive and non-destructive methods through a leaf area integrator (LI-COR® -LI-3100C model), and by measurements based on the midrib length of all leaves, respectively. The results indicate that the hemispherical images were appropriate to estimate the LAI and biomass production of irrigated cotton, while for the estimation of yield, more research is needed to improve the method.ZIANY NEIVA BRANDAO, CNPA; JOAO HENRIQUE ZONTA, CNPA.BRANDAO, Z. N.ZONTA, J. H.2017-03-03T11:11:11Z2017-03-03T11:11:11Z2017-03-0320162017-03-03T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRevista Brasileira de Engenharia Agrícola e Ambiental, v. 20, n. 9, p. 789-794, 2016.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1066084enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-16T04:00:14Zoai:www.alice.cnptia.embrapa.br:doc/1066084Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T04:00:14falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T04:00:14Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Hemispherical photography to estimate biophysical variables of cotton. |
title |
Hemispherical photography to estimate biophysical variables of cotton. |
spellingShingle |
Hemispherical photography to estimate biophysical variables of cotton. BRANDAO, Z. N. Algodão Biomassa Cotton Biomass |
title_short |
Hemispherical photography to estimate biophysical variables of cotton. |
title_full |
Hemispherical photography to estimate biophysical variables of cotton. |
title_fullStr |
Hemispherical photography to estimate biophysical variables of cotton. |
title_full_unstemmed |
Hemispherical photography to estimate biophysical variables of cotton. |
title_sort |
Hemispherical photography to estimate biophysical variables of cotton. |
author |
BRANDAO, Z. N. |
author_facet |
BRANDAO, Z. N. ZONTA, J. H. |
author_role |
author |
author2 |
ZONTA, J. H. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
ZIANY NEIVA BRANDAO, CNPA; JOAO HENRIQUE ZONTA, CNPA. |
dc.contributor.author.fl_str_mv |
BRANDAO, Z. N. ZONTA, J. H. |
dc.subject.por.fl_str_mv |
Algodão Biomassa Cotton Biomass |
topic |
Algodão Biomassa Cotton Biomass |
description |
The Leaf Area Index (LAI) is a key parameter to evaluate the vegetation spectral response, estimating plant nutrition and water requirements. However, in large fields is difficult to obtain accurate data to LAI determination. Therefore, the objective of this study was the estimation of LAI, biomass and yield of irrigated cotton through digital hemispherical photography. The treatments consisted of four nitrogen doses (0, 90, 180 and 270 kg ha-1) and four phosphorus doses (0, 120, 240 and 360 kg ha-1). Digital hemispherical photographs were collected under similar sky brightness conditions at 60 and 75 days after emergence (DAE), performed by the Digital Plant Canopy Imager - CI-110® of CID Inc. Biomass and LAI measurements were made on the same dates. LAI was also determined by destructive and non-destructive methods through a leaf area integrator (LI-COR® -LI-3100C model), and by measurements based on the midrib length of all leaves, respectively. The results indicate that the hemispherical images were appropriate to estimate the LAI and biomass production of irrigated cotton, while for the estimation of yield, more research is needed to improve the method. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016 2017-03-03T11:11:11Z 2017-03-03T11:11:11Z 2017-03-03 2017-03-03T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Revista Brasileira de Engenharia Agrícola e Ambiental, v. 20, n. 9, p. 789-794, 2016. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1066084 |
identifier_str_mv |
Revista Brasileira de Engenharia Agrícola e Ambiental, v. 20, n. 9, p. 789-794, 2016. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1066084 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503433542172672 |