Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio

Detalhes bibliográficos
Autor(a) principal: Abrahão, Selma Alves
Data de Publicação: 2007
Tipo de documento: Dissertação
Idioma: por
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://locus.ufv.br/handle/123456789/3689
Resumo: The use of variable nitrogen rate application is more efficient, avoiding losses by lixiviation. Assuming that it is possible to discriminate nitrogen rates by the spectral response of forage crops, it becomes necessary the knowledge of this variable effect on the forage spectral response. The goal of the present research was to evaluate the effect of four nitrogen rates (0, 80, 160 e 320 kg ha-1) and three planting densities (9, 25 e 49 plants m-2) on the spectral response of the Panicum maximum cv. Tanzânia, on the correlation between the vegetation indices (NDVI, VARIRedEdge, VARIGreen, WDRVI(0.05), WDRVI(0.1) e WDRVI(0.2)) and on the chlorophyll measurements (SPAD readings) and on the dry mass (MS). The research was developed with the treatments arranged in a factorial of four N rates and three planting densities, according to the randomize block design, in the Animal Science Department of UFV, Viçosa-MG, at the Forragicultura field, from November of 2006 to January of 2007. Four data evaluations were accomplished in the field using two spectroradiometers SD2000 for spectral data sampling in 400 and 900 nm wavelengths, with spectral resolution of 0.34 nm. Using the bidirectional reflectance factors the blue (460 to 480 nm), the green (545 to 564 nm), the red (620 to 670 nm), the transition of the red to near infrared (700 to 710 nm) and the near infrared (840 to 880 nm) bands of the satellites MODIS and MERIS were simulated to calculate the six vegetation indices. In agreement with the obtained results, it was obtained that, the spectral response of the Tanzânia grass crop along the evaluations, presented a characteristic behavior of green vegetation. In the visible region, there was general tendency of the spectral reflectance of the Tanzânia grass crop to decrease with the increasing of the nitrogen rates. While in the near infrared region, the spectral response was opposed to the visible region one. The planting density, one year after its establishment, in two spectral bandwidths (visible and near infrared), did not influence the reflectance, as well as it did not influence the following variables: N content, vegetation indices and dry mass production. For 30 days after the first cut and 20 days after the fertilizer application, the WDRVI(0.05) was the best index to discriminate rates of nitrogen. For 15 days after the second cut and 13 days after the first fertilizer application, the VARIRedEdge was the best index to discriminate rates of nitrogen. For 26 days after the second cut and 11 days after the second fertilizer application, the WDRVI(0.05) and VARIRedEdge were the best indices to discriminate rates of nitrogen. The results indicated that there was not a unique index that can be used for discriminating all the N rates applied on different dates of application. For all dates of data evaluations, the index that presented the highest correlation with SPAD values and MS was the VARIRedEdge.
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spelling Abrahão, Selma Alveshttp://lattes.cnpq.br/1143321215321225Queiroz, Daniel Marçal dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783625P5Pinto, Francisco de Assis de Carvalhohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4784515P9Fonseca, Dilermando Miranda dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780539D6Resende, Ricardo Capúcio dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727053A4Fernandes Filho, Elpídio Ináciohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4703656Z42015-03-26T13:24:03Z2007-07-242015-03-26T13:24:03Z2007-03-20ABRAHÃO, Selma Alves. Spectral response of Tanzania grass to nitrogen fertilization and planting density. 2007. 83 f. Dissertação (Mestrado em Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ) - Universidade Federal de Viçosa, Viçosa, 2007.http://locus.ufv.br/handle/123456789/3689The use of variable nitrogen rate application is more efficient, avoiding losses by lixiviation. Assuming that it is possible to discriminate nitrogen rates by the spectral response of forage crops, it becomes necessary the knowledge of this variable effect on the forage spectral response. The goal of the present research was to evaluate the effect of four nitrogen rates (0, 80, 160 e 320 kg ha-1) and three planting densities (9, 25 e 49 plants m-2) on the spectral response of the Panicum maximum cv. Tanzânia, on the correlation between the vegetation indices (NDVI, VARIRedEdge, VARIGreen, WDRVI(0.05), WDRVI(0.1) e WDRVI(0.2)) and on the chlorophyll measurements (SPAD readings) and on the dry mass (MS). The research was developed with the treatments arranged in a factorial of four N rates and three planting densities, according to the randomize block design, in the Animal Science Department of UFV, Viçosa-MG, at the Forragicultura field, from November of 2006 to January of 2007. Four data evaluations were accomplished in the field using two spectroradiometers SD2000 for spectral data sampling in 400 and 900 nm wavelengths, with spectral resolution of 0.34 nm. Using the bidirectional reflectance factors the blue (460 to 480 nm), the green (545 to 564 nm), the red (620 to 670 nm), the transition of the red to near infrared (700 to 710 nm) and the near infrared (840 to 880 nm) bands of the satellites MODIS and MERIS were simulated to calculate the six vegetation indices. In agreement with the obtained results, it was obtained that, the spectral response of the Tanzânia grass crop along the evaluations, presented a characteristic behavior of green vegetation. In the visible region, there was general tendency of the spectral reflectance of the Tanzânia grass crop to decrease with the increasing of the nitrogen rates. While in the near infrared region, the spectral response was opposed to the visible region one. The planting density, one year after its establishment, in two spectral bandwidths (visible and near infrared), did not influence the reflectance, as well as it did not influence the following variables: N content, vegetation indices and dry mass production. For 30 days after the first cut and 20 days after the fertilizer application, the WDRVI(0.05) was the best index to discriminate rates of nitrogen. For 15 days after the second cut and 13 days after the first fertilizer application, the VARIRedEdge was the best index to discriminate rates of nitrogen. For 26 days after the second cut and 11 days after the second fertilizer application, the WDRVI(0.05) and VARIRedEdge were the best indices to discriminate rates of nitrogen. The results indicated that there was not a unique index that can be used for discriminating all the N rates applied on different dates of application. For all dates of data evaluations, the index that presented the highest correlation with SPAD values and MS was the VARIRedEdge.O uso de aplicação à taxa variável de nitrogênio é mais eficiente, evitando as perdas, especialmente por lixiviação. Tendo em vista que seja possível discriminar as doses de nitrogênio a partir da resposta espectral do dossel das forrageiras, torna-se necessário o conhecimento do efeito dessa variável sobre a resposta espectral da cultura. Com a presente pesquisa objetivou-se avaliar o efeito de quatro doses de nitrogênio (0, 80, 160 e 320 kg ha-1) e três densidades de plantio (9, 25 e 49 plantas m-2) na resposta espectral do dossel do Panicum maximum cv. Tanzânia, nas correlações entre índices de vegetação (NDVI, VARIRedEdge, VARIGreen, WDRVI(0,05), WDRVI(0,1) e WDRVI(0,2)) e medições de clorofila (valores SPAD) e massa seca (MS). O experimento foi conduzido com os tratamentos arranjados num fatorial quatro doses de N e três densidades de plantio, segundo o delineamento em blocos casualizados, no Setor de Forragicultura do Departamento de Zootecnia da UFV, em Viçosa-MG, no período de novembro de 2006 a janeiro de 2007. Foram realizadas quatro avaliações em campo, com dois espectrorradiômetros SD2000, utilizados para obterem dados espectrais nos comprimentos de onda compreendidos entre 400 e 900 nm, com a resolução espectral de 0,34 nm. Com os fatores de reflectância bidirecional determinados, simularam-se às bandas azul (460 a 480 nm), verde (545 a 565 nm), vermelho (620 a 670 nm), transição do vermelho ao infravermelho próximo (700 a 710 nm) e infravermelho próximo (840 a 880 nm) dos satélites MODIS e MERIS e, a partir destas, foram calculados os seis índices de vegetação. De acordo com os resultados obtidos, concluiu-se que, a resposta espectral do dossel do capim-tanzânia ao longo das avaliações, tenderam em geral apresentar comportamento característico de vegetação verde. Na região do visível do espectro, houve uma tendência geral da reflectância do dossel da capim-tanzânia diminuir com o aumento das doses de nitrogênio. Enquanto na região do infravermelho próximo, a resposta espectral foi oposta a da região do visível do espectro. A densidade de plantio, um ano após o seu estabelecimento, nas duas regiões espectrais (visível e infravermelho), não influenciou a reflectância, como também não influenciou as variáveis teor de N foliar, índices de vegetação e massa de forragem seca. Para 30 dias após o primeiro corte e 20 dias após a adubação, o WDRVI(0,05) foi o melhor índice para discriminar doses de nitrogênio. Para 15 dias após o segundo corte e 13 dias após a primeira parcela da adubação, o VARIRedEdge foi o melhor índice para discriminar doses de nitrogênio. Para 26 dias após o segundo corte e 11 dias após a segunda parcela da adubação, os índices VARIRedEdge e WDRVI(0,05) foram os melhores para discriminar doses de nitrogênio. Os resultados indicaram que não houve tendência de um mesmo índice sobressair para discriminar as doses de N aplicadas em relação aos outros para as datas estudadas. Para as todas datas de avaliação, o índice que tem maior correlação com os valores de SPAD e MS foi o VARIRedEdge.Conselho Nacional de Desenvolvimento Científico e Tecnológicoapplication/pdfporUniversidade Federal de ViçosaMestrado em Engenharia AgrícolaUFVBRConstruções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produRadiometria de campoAgricultura de precisãoNitrogênioField radiometryPrecision agricultureNitrogenCNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA::MAQUINAS E IMPLEMENTOS AGRICOLASResposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantioSpectral response of Tanzania grass to nitrogen fertilization and planting densityinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf1667261https://locus.ufv.br//bitstream/123456789/3689/1/texto%20completo.pdf83064c3339f44a76a6c9ac603ade90e0MD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain134455https://locus.ufv.br//bitstream/123456789/3689/2/texto%20completo.pdf.txtadac746069a933858e9d1540e429cdaaMD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3584https://locus.ufv.br//bitstream/123456789/3689/3/texto%20completo.pdf.jpgbd2569911a883975a7ad28a0a323070fMD53123456789/36892016-04-09 23:11:19.501oai:locus.ufv.br:123456789/3689Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-10T02:11:19LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.por.fl_str_mv Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
dc.title.alternative.eng.fl_str_mv Spectral response of Tanzania grass to nitrogen fertilization and planting density
title Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
spellingShingle Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
Abrahão, Selma Alves
Radiometria de campo
Agricultura de precisão
Nitrogênio
Field radiometry
Precision agriculture
Nitrogen
CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA::MAQUINAS E IMPLEMENTOS AGRICOLAS
title_short Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
title_full Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
title_fullStr Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
title_full_unstemmed Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
title_sort Resposta espectral do capim-tanzânia à adubação nitrogenada e densidades de plantio
author Abrahão, Selma Alves
author_facet Abrahão, Selma Alves
author_role author
dc.contributor.authorLattes.por.fl_str_mv http://lattes.cnpq.br/1143321215321225
dc.contributor.author.fl_str_mv Abrahão, Selma Alves
dc.contributor.advisor-co1.fl_str_mv Queiroz, Daniel Marçal de
dc.contributor.advisor-co1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783625P5
dc.contributor.advisor1.fl_str_mv Pinto, Francisco de Assis de Carvalho
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4784515P9
dc.contributor.referee1.fl_str_mv Fonseca, Dilermando Miranda da
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4780539D6
dc.contributor.referee2.fl_str_mv Resende, Ricardo Capúcio de
dc.contributor.referee2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4727053A4
dc.contributor.referee3.fl_str_mv Fernandes Filho, Elpídio Inácio
dc.contributor.referee3Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4703656Z4
contributor_str_mv Queiroz, Daniel Marçal de
Pinto, Francisco de Assis de Carvalho
Fonseca, Dilermando Miranda da
Resende, Ricardo Capúcio de
Fernandes Filho, Elpídio Inácio
dc.subject.por.fl_str_mv Radiometria de campo
Agricultura de precisão
Nitrogênio
topic Radiometria de campo
Agricultura de precisão
Nitrogênio
Field radiometry
Precision agriculture
Nitrogen
CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA::MAQUINAS E IMPLEMENTOS AGRICOLAS
dc.subject.eng.fl_str_mv Field radiometry
Precision agriculture
Nitrogen
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA::MAQUINAS E IMPLEMENTOS AGRICOLAS
description The use of variable nitrogen rate application is more efficient, avoiding losses by lixiviation. Assuming that it is possible to discriminate nitrogen rates by the spectral response of forage crops, it becomes necessary the knowledge of this variable effect on the forage spectral response. The goal of the present research was to evaluate the effect of four nitrogen rates (0, 80, 160 e 320 kg ha-1) and three planting densities (9, 25 e 49 plants m-2) on the spectral response of the Panicum maximum cv. Tanzânia, on the correlation between the vegetation indices (NDVI, VARIRedEdge, VARIGreen, WDRVI(0.05), WDRVI(0.1) e WDRVI(0.2)) and on the chlorophyll measurements (SPAD readings) and on the dry mass (MS). The research was developed with the treatments arranged in a factorial of four N rates and three planting densities, according to the randomize block design, in the Animal Science Department of UFV, Viçosa-MG, at the Forragicultura field, from November of 2006 to January of 2007. Four data evaluations were accomplished in the field using two spectroradiometers SD2000 for spectral data sampling in 400 and 900 nm wavelengths, with spectral resolution of 0.34 nm. Using the bidirectional reflectance factors the blue (460 to 480 nm), the green (545 to 564 nm), the red (620 to 670 nm), the transition of the red to near infrared (700 to 710 nm) and the near infrared (840 to 880 nm) bands of the satellites MODIS and MERIS were simulated to calculate the six vegetation indices. In agreement with the obtained results, it was obtained that, the spectral response of the Tanzânia grass crop along the evaluations, presented a characteristic behavior of green vegetation. In the visible region, there was general tendency of the spectral reflectance of the Tanzânia grass crop to decrease with the increasing of the nitrogen rates. While in the near infrared region, the spectral response was opposed to the visible region one. The planting density, one year after its establishment, in two spectral bandwidths (visible and near infrared), did not influence the reflectance, as well as it did not influence the following variables: N content, vegetation indices and dry mass production. For 30 days after the first cut and 20 days after the fertilizer application, the WDRVI(0.05) was the best index to discriminate rates of nitrogen. For 15 days after the second cut and 13 days after the first fertilizer application, the VARIRedEdge was the best index to discriminate rates of nitrogen. For 26 days after the second cut and 11 days after the second fertilizer application, the WDRVI(0.05) and VARIRedEdge were the best indices to discriminate rates of nitrogen. The results indicated that there was not a unique index that can be used for discriminating all the N rates applied on different dates of application. For all dates of data evaluations, the index that presented the highest correlation with SPAD values and MS was the VARIRedEdge.
publishDate 2007
dc.date.available.fl_str_mv 2007-07-24
2015-03-26T13:24:03Z
dc.date.issued.fl_str_mv 2007-03-20
dc.date.accessioned.fl_str_mv 2015-03-26T13:24:03Z
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dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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dc.identifier.citation.fl_str_mv ABRAHÃO, Selma Alves. Spectral response of Tanzania grass to nitrogen fertilization and planting density. 2007. 83 f. Dissertação (Mestrado em Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ) - Universidade Federal de Viçosa, Viçosa, 2007.
dc.identifier.uri.fl_str_mv http://locus.ufv.br/handle/123456789/3689
identifier_str_mv ABRAHÃO, Selma Alves. Spectral response of Tanzania grass to nitrogen fertilization and planting density. 2007. 83 f. Dissertação (Mestrado em Construções rurais e ambiência; Energia na agricultura; Mecanização agrícola; Processamento de produ) - Universidade Federal de Viçosa, Viçosa, 2007.
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