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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
23/02/2015 |
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Data da última atualização: |
24/02/2015 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
FERREIRA, G. B.; ALMEIDA, R. P. de; SILVA FILHO, J. L. da; SILVA, H. R. da; MIRANDA, C. H. B.; CARVALHO, M. da C. S.; SILVA FILHO, P. M. da; DENARDIN, J. E.; ROCHA, M. de M.; NEUMAIER, N.; CRUZ, I.; MUTADIUA, C.; IPO, A. do R.; MALEIA, M. P.; NAPITA, I. C.; SIMBA, D. |
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Afiliação: |
GILVAN BARBOSA FERREIRA, CNPA; RAUL PORFIRIO DE ALMEIDA, CNPA; JOAO LUIS DA SILVA FILHO, CNPA; HENOQUE RIBEIRO DA SILVA, SRI; CESAR HERACLIDES BEHLING MIRANDA, CNPAE; MARIA DA CONCEICAO SANTANA CARVALHO, CNPAF; PEDRO MOREIRA DA SILVA FILHO, CNPSO; JOSE ELOIR DENARDIN, CNPT; MAURISRAEL DE MOURA ROCHA, CPAMN; NORMAN NEUMAIER, CNPSO; IVAN CRUZ, CNPMS; CELSO MUTADIUA, CONSULTOR; ANTONIO DO R. IPO, CZNe/ IIAM, Nampula; MANUEL PEDRO MALEIA, CZNe/ IIAM, Nampula; IDALINA C. NAPITA, CZNe/ IIAM, Nampula; DOMINGO SIMBA, CZNe/ IIAM, Nampula. |
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Título: |
Effects of the method of phosphorus fertilizer application on cotton growth and production in Muriaze, Nampula, Mozambique. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: SEMINÁRIO DE DIVULGAÇÃO DE RESULTADOS DA INVESTIGAÇÃO AGRÁRIAS NO CORREDOR DE NACALA, 1., 2014, Nampula. Nampula: Instituto de Investigação Agrária de Moçambique, 2014. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Cotton needs soils with good amounts of available phosphorus (P) or annual fertilization to correct its needs of extracting 25kg of P per ha to produce a ton of cottonseed. Phosphorus fertilizer is expensive and should be used with maximum efficiency. Soils from Mozambique are poor in P, and fertilizer is rare in the local market, due to poor demand and high cost. Thus, a study was conducted to check out the effect of application of P and the best way of disposing P fertilizer in the soil. Two rates of P2O5 (0 and 80 kg/ha) were compared, with four methods of application: no application; broadcasting over the soil; broadcasting and incorporation into the soil; and incorporation in the planting row. Every treatment was replicated four times, being each one 5 rows of 5 m each, spaced 0.9 m. Before planting, all experimental area received liming (1 ton/ha of calcium dolomite) and basic fertilization with 150 kg N/ha and 100 kg K2O/ha. The cultivar BRS 293 was used for the experiment, being planted in 21/12/2012, with a density of 10 seeds per lineal meter. Cotton grew better in the presence of P, but there was not response in its productivity, because of loss of cotton flower buds and small bolls due to strong insect attacks and severe drought during the growth period. |
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Palavras-Chave: |
Projeto Pro Savana. |
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Thesagro: |
Algodão; Fertilidade do solo; Fertilizante nitrogenado; Fósforo. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/116272/1/Seminario-Nampula-Mocambique-2014.pdf
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Marc: |
LEADER 02482naa a2200373 a 4500
001 2009426
005 2015-02-24
008 2014 bl uuuu u00u1 u #d
100 1 $aFERREIRA, G. B.
245 $aEffects of the method of phosphorus fertilizer application on cotton growth and production in Muriaze, Nampula, Mozambique.
260 $c2014
300 $c1 CD-ROM.
520 $aCotton needs soils with good amounts of available phosphorus (P) or annual fertilization to correct its needs of extracting 25kg of P per ha to produce a ton of cottonseed. Phosphorus fertilizer is expensive and should be used with maximum efficiency. Soils from Mozambique are poor in P, and fertilizer is rare in the local market, due to poor demand and high cost. Thus, a study was conducted to check out the effect of application of P and the best way of disposing P fertilizer in the soil. Two rates of P2O5 (0 and 80 kg/ha) were compared, with four methods of application: no application; broadcasting over the soil; broadcasting and incorporation into the soil; and incorporation in the planting row. Every treatment was replicated four times, being each one 5 rows of 5 m each, spaced 0.9 m. Before planting, all experimental area received liming (1 ton/ha of calcium dolomite) and basic fertilization with 150 kg N/ha and 100 kg K2O/ha. The cultivar BRS 293 was used for the experiment, being planted in 21/12/2012, with a density of 10 seeds per lineal meter. Cotton grew better in the presence of P, but there was not response in its productivity, because of loss of cotton flower buds and small bolls due to strong insect attacks and severe drought during the growth period.
650 $aAlgodão
650 $aFertilidade do solo
650 $aFertilizante nitrogenado
650 $aFósforo
653 $aProjeto Pro Savana
700 1 $aALMEIDA, R. P. de
700 1 $aSILVA FILHO, J. L. da
700 1 $aSILVA, H. R. da
700 1 $aMIRANDA, C. H. B.
700 1 $aCARVALHO, M. da C. S.
700 1 $aSILVA FILHO, P. M. da
700 1 $aDENARDIN, J. E.
700 1 $aROCHA, M. de M.
700 1 $aNEUMAIER, N.
700 1 $aCRUZ, I.
700 1 $aMUTADIUA, C.
700 1 $aIPO, A. do R.
700 1 $aMALEIA, M. P.
700 1 $aNAPITA, I. C.
700 1 $aSIMBA, D.
773 $tIn: SEMINÁRIO DE DIVULGAÇÃO DE RESULTADOS DA INVESTIGAÇÃO AGRÁRIAS NO CORREDOR DE NACALA, 1., 2014, Nampula. Nampula: Instituto de Investigação Agrária de Moçambique, 2014.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
28/09/2022 |
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Data da última atualização: |
28/09/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
OLIVEIRA, J. F. de; BROSSARD, M.; CORAZZA, E. J.; GUIMARAES, M. de F.; MARCHAO, R. L. |
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Afiliação: |
JOSE FRANCIRLEI DE OLIVEIRA; MICHEL BROSSARD; EDEMAR JOAQUIM CORAZZA, SUCOM; MARIA DE FATIMA GUIMARAES; ROBELIO LEANDRO MARCHAO, CPAC. |
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Título: |
Field-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazil. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Geoderma Regional, v. 30, e00532, 2022. |
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Páginas: |
13 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Visible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ́ acrico (Haplic Ferralsol) and a Latossolo Ver- melho distrofico ́ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of soil parameters. In addition, the complete spectrum (mainly in 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm) was better spatially correlated with soil properties than the decomposition of the spectrum by the RID. Soil classification and level of dis- cretization as affected by spectral variability were also discussed here. Three soil groups were discriminated mainly by the Ki and Kr indexes and clay content. Moreover, the variability of the spectra was conditioned by the spatial variability of the mentioned variables. The clay content for soils with a discrepant particle size (group 1 compared with groups 2 and 3) and the Ki and Kr indexes for soils with a homogeneous particle size (between groups 2 and 3), associated with the full Vis-NIR spectral analysis, allowed building thematic maps with a good precision, without the need of mathematical models; this was possible by the modification of the reflectance intensity and the size of the concavity of the spectral band. MenosVisible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ́ acrico (Haplic Ferralsol) and a Latossolo Ver- melho distrofico ́ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of so... Mostrar Tudo |
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Palavras-Chave: |
Diferença de inflexão de refletância; Índices Ki e Kr; Variabilidade espacial do solo. |
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Thesagro: |
Espectrometria. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03213naa a2200229 a 4500
001 2146935
005 2022-09-28
008 2022 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, J. F. de
245 $aField-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazil.$h[electronic resource]
260 $c2022
300 $a13 p.
520 $aVisible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ́ acrico (Haplic Ferralsol) and a Latossolo Ver- melho distrofico ́ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of soil parameters. In addition, the complete spectrum (mainly in 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm) was better spatially correlated with soil properties than the decomposition of the spectrum by the RID. Soil classification and level of dis- cretization as affected by spectral variability were also discussed here. Three soil groups were discriminated mainly by the Ki and Kr indexes and clay content. Moreover, the variability of the spectra was conditioned by the spatial variability of the mentioned variables. The clay content for soils with a discrepant particle size (group 1 compared with groups 2 and 3) and the Ki and Kr indexes for soils with a homogeneous particle size (between groups 2 and 3), associated with the full Vis-NIR spectral analysis, allowed building thematic maps with a good precision, without the need of mathematical models; this was possible by the modification of the reflectance intensity and the size of the concavity of the spectral band.
650 $aEspectrometria
653 $aDiferença de inflexão de refletância
653 $aÍndices Ki e Kr
653 $aVariabilidade espacial do solo
700 1 $aBROSSARD, M.
700 1 $aCORAZZA, E. J.
700 1 $aGUIMARAES, M. de F.
700 1 $aMARCHAO, R. L.
773 $tGeoderma Regional$gv. 30, e00532, 2022.
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