Nitrogen management in wheat based on the normalized difference vegetation index (NDVI)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900251 |
Resumo: | ABSTRACT: Biomass production and nitrogen (N) accumulated in wheat shoots may be used for quantifying optimal topdressing nitrogen doses. The objective of this study was to develop and validate models for estimating the amount of biomass and nitrogen accumulated in shoots and the N topdressing dose of maximum technical efficiency in wheat using the normalized difference vegetation index (NDVI) measured by an active optical canopy sensor. Field experiments were carried out in two years and treatments consisted of N doses applied at plant emergence and as topdressing. NDVI, shoot biomass and N accumulated in shoots at the growth stage of six fully expanded leaves and grain yield were evaluated, being determined the topdressing N dose of maximum technical efficiency (DMTE). The NDVI was positively correlated to shoot biomass and N content in shoots and models for the relationship between these variables were developed and validated. The DMTE was negatively correlated with the NDVI value evaluated at the moment of N topdressing application. Thus, NDVI evaluation by an active optical canopy sensor can be used for nitrogen fertilization in variable rate, allowing the adjustment of applied N doses in different areas within a field. |
id |
UFSM-2_cf3ab6141c200d3dfa28a4e755780569 |
---|---|
oai_identifier_str |
oai:scielo:S0103-84782018000900251 |
network_acronym_str |
UFSM-2 |
network_name_str |
Ciência rural (Online) |
repository_id_str |
|
spelling |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI)Triticum aestivumvegetation sensorvariable rateGreenseekerABSTRACT: Biomass production and nitrogen (N) accumulated in wheat shoots may be used for quantifying optimal topdressing nitrogen doses. The objective of this study was to develop and validate models for estimating the amount of biomass and nitrogen accumulated in shoots and the N topdressing dose of maximum technical efficiency in wheat using the normalized difference vegetation index (NDVI) measured by an active optical canopy sensor. Field experiments were carried out in two years and treatments consisted of N doses applied at plant emergence and as topdressing. NDVI, shoot biomass and N accumulated in shoots at the growth stage of six fully expanded leaves and grain yield were evaluated, being determined the topdressing N dose of maximum technical efficiency (DMTE). The NDVI was positively correlated to shoot biomass and N content in shoots and models for the relationship between these variables were developed and validated. The DMTE was negatively correlated with the NDVI value evaluated at the moment of N topdressing application. Thus, NDVI evaluation by an active optical canopy sensor can be used for nitrogen fertilization in variable rate, allowing the adjustment of applied N doses in different areas within a field.Universidade Federal de Santa Maria2018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900251Ciência Rural v.48 n.9 2018reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20170743info:eu-repo/semantics/openAccessVian,André LuisBredemeier,ChristianTurra,Marcos AlexandreGiordano,Cecília Paz da SilvaFochesatto,ElizandroSilva,Jhonatan Alves daDrum,Maicon Andreoeng2018-08-14T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
title |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
spellingShingle |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) Vian,André Luis Triticum aestivum vegetation sensor variable rate Greenseeker |
title_short |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
title_full |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
title_fullStr |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
title_full_unstemmed |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
title_sort |
Nitrogen management in wheat based on the normalized difference vegetation index (NDVI) |
author |
Vian,André Luis |
author_facet |
Vian,André Luis Bredemeier,Christian Turra,Marcos Alexandre Giordano,Cecília Paz da Silva Fochesatto,Elizandro Silva,Jhonatan Alves da Drum,Maicon Andreo |
author_role |
author |
author2 |
Bredemeier,Christian Turra,Marcos Alexandre Giordano,Cecília Paz da Silva Fochesatto,Elizandro Silva,Jhonatan Alves da Drum,Maicon Andreo |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Vian,André Luis Bredemeier,Christian Turra,Marcos Alexandre Giordano,Cecília Paz da Silva Fochesatto,Elizandro Silva,Jhonatan Alves da Drum,Maicon Andreo |
dc.subject.por.fl_str_mv |
Triticum aestivum vegetation sensor variable rate Greenseeker |
topic |
Triticum aestivum vegetation sensor variable rate Greenseeker |
description |
ABSTRACT: Biomass production and nitrogen (N) accumulated in wheat shoots may be used for quantifying optimal topdressing nitrogen doses. The objective of this study was to develop and validate models for estimating the amount of biomass and nitrogen accumulated in shoots and the N topdressing dose of maximum technical efficiency in wheat using the normalized difference vegetation index (NDVI) measured by an active optical canopy sensor. Field experiments were carried out in two years and treatments consisted of N doses applied at plant emergence and as topdressing. NDVI, shoot biomass and N accumulated in shoots at the growth stage of six fully expanded leaves and grain yield were evaluated, being determined the topdressing N dose of maximum technical efficiency (DMTE). The NDVI was positively correlated to shoot biomass and N content in shoots and models for the relationship between these variables were developed and validated. The DMTE was negatively correlated with the NDVI value evaluated at the moment of N topdressing application. Thus, NDVI evaluation by an active optical canopy sensor can be used for nitrogen fertilization in variable rate, allowing the adjustment of applied N doses in different areas within a field. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900251 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000900251 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20170743 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.48 n.9 2018 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140552946810880 |