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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
21/11/2018 |
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Data da última atualização: |
11/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MATTOS, A. G. de; LIMA, E. S. A.; AMARAL SOBRINHO, N. M. B. do; ZOFFOLI, H. J. de O.; PEREZ, D. V. |
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Afiliação: |
AMANDA GUIMARÃES DE MATTOS, UFRRJ; ERICA SOUTO ABREU LIMA, UFRRJ; NELSON MOURA BRASIL DO AMARAL SOBRINHO, UFRRJ; HUGO JOSÉ DE OLIVEIRA ZOFFOLI, UFRRJ; DANIEL VIDAL PEREZ, CNPS. |
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Título: |
Multivariate analyses to establish reference values for soils in Médio Paraíba, state of Rio de Janeiro, Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Revista Ciência Agronômica, v. 49, n. 1, p. 1-10, jan./mar. 2018. |
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DOI: |
http://doi.org/10.5935/1806-6690.20180001 |
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Idioma: |
Inglês |
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Conteúdo: |
Quality Reference Values (QRVs) for potentially toxic elements are obtained from background levels in soils. However, this determination from mean values or percentiles is not appropriate given the variability in the natural distribution of these elements in soils. Therefore, the objective of this study was to propose a new methodology to establish the QRVs, using the Médio Paraíba region (RJ, Brazil) as an example, from groups of soils defined based on the pseudo-total levels of B, Ba, Co, Cr, Cu, Ni, Pb, and Zn through the use of multivariate analyses and discriminant functions. A total of 40 points, collected at depths of 0-20 and 20-40 cm, were used for the determination of pseudo-total contents, according to the EPA 3051A methodology. The samples were separated into three groups to better represent the variability of the soils of the region. The classification functions were obtained based on the variables Mn, Fe, and Mg. In general, the groups G1 and G2 presented lower values than the ones obtained when the sample universe was used, whereas G3 presented higher values. The QRVs obtained from the soil groups presented substantial differences that translate into advantages for the management of the contaminated areas of the region. Valores de Referência de Qualidade (VRQ) para elementos potencialmente tóxicos são obtidos através dos teores naturais nos solos. No entanto, esta determinação a partir de valores médios ou de percentis não é adequada, diante da variabilidade existente na distribuição natural desses elementos nos solos. Diante disso, o objetivo do estudo foi propor uma nova metodologia de estabelecimento dos VRQs, usando como exemplo a Região do Médio Paraíba - RJ, a partir de grupos de solos definidos com base nos teores pseudo-totais de B, Ba, Co, Cr, Cu, Ni, Pb e Zn, mediante a utilização de análises multivariadas e de funções discriminantes. Foram utilizados 40 pontos, coletados nas profundidades 0-20 e 20-40 cm, para a determinação dos teores pseudo-totais, conforme a metodologia EPA 3051A. As amostras foram separadas em três grupos, para melhor representar a variabilidade existente nos solos da região. As funções de classificação foram obtidas com base nas variáveis Mn, Fe e Mg. Em geral, os grupos G1 e G2 apresentaram valores inferiores, em relação aos obtidos quando se utilizou o universo amostral. Enquanto que, G3 apresentou valores superiores. Os VRQs obtidos a partir de grupos de solos apresentaram diferenças substanciais que traduzem vantagens para o gerenciamento de áreas contaminadas da região. MenosQuality Reference Values (QRVs) for potentially toxic elements are obtained from background levels in soils. However, this determination from mean values or percentiles is not appropriate given the variability in the natural distribution of these elements in soils. Therefore, the objective of this study was to propose a new methodology to establish the QRVs, using the Médio Paraíba region (RJ, Brazil) as an example, from groups of soils defined based on the pseudo-total levels of B, Ba, Co, Cr, Cu, Ni, Pb, and Zn through the use of multivariate analyses and discriminant functions. A total of 40 points, collected at depths of 0-20 and 20-40 cm, were used for the determination of pseudo-total contents, according to the EPA 3051A methodology. The samples were separated into three groups to better represent the variability of the soils of the region. The classification functions were obtained based on the variables Mn, Fe, and Mg. In general, the groups G1 and G2 presented lower values than the ones obtained when the sample universe was used, whereas G3 presented higher values. The QRVs obtained from the soil groups presented substantial differences that translate into advantages for the management of the contaminated areas of the region. Valores de Referência de Qualidade (VRQ) para elementos potencialmente tóxicos são obtidos através dos teores naturais nos solos. No entanto, esta determinação a partir de valores médios ou de percentis não é adequada, diante da variabilidade e... Mostrar Tudo |
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Palavras-Chave: |
Análise de agrupamento; Valores orientadores. |
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Thesagro: |
Metal Pesado; Método de Análise. |
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Thesaurus Nal: |
Cluster analysis; Heavy metals. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/186612/1/2018-047.pdf
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Marc: |
LEADER 03442naa a2200253 a 4500
001 2099794
005 2021-11-11
008 2018 bl uuuu u00u1 u #d
024 7 $ahttp://doi.org/10.5935/1806-6690.20180001$2DOI
100 1 $aMATTOS, A. G. de
245 $aMultivariate analyses to establish reference values for soils in Médio Paraíba, state of Rio de Janeiro, Brazil.$h[electronic resource]
260 $c2018
520 $aQuality Reference Values (QRVs) for potentially toxic elements are obtained from background levels in soils. However, this determination from mean values or percentiles is not appropriate given the variability in the natural distribution of these elements in soils. Therefore, the objective of this study was to propose a new methodology to establish the QRVs, using the Médio Paraíba region (RJ, Brazil) as an example, from groups of soils defined based on the pseudo-total levels of B, Ba, Co, Cr, Cu, Ni, Pb, and Zn through the use of multivariate analyses and discriminant functions. A total of 40 points, collected at depths of 0-20 and 20-40 cm, were used for the determination of pseudo-total contents, according to the EPA 3051A methodology. The samples were separated into three groups to better represent the variability of the soils of the region. The classification functions were obtained based on the variables Mn, Fe, and Mg. In general, the groups G1 and G2 presented lower values than the ones obtained when the sample universe was used, whereas G3 presented higher values. The QRVs obtained from the soil groups presented substantial differences that translate into advantages for the management of the contaminated areas of the region. Valores de Referência de Qualidade (VRQ) para elementos potencialmente tóxicos são obtidos através dos teores naturais nos solos. No entanto, esta determinação a partir de valores médios ou de percentis não é adequada, diante da variabilidade existente na distribuição natural desses elementos nos solos. Diante disso, o objetivo do estudo foi propor uma nova metodologia de estabelecimento dos VRQs, usando como exemplo a Região do Médio Paraíba - RJ, a partir de grupos de solos definidos com base nos teores pseudo-totais de B, Ba, Co, Cr, Cu, Ni, Pb e Zn, mediante a utilização de análises multivariadas e de funções discriminantes. Foram utilizados 40 pontos, coletados nas profundidades 0-20 e 20-40 cm, para a determinação dos teores pseudo-totais, conforme a metodologia EPA 3051A. As amostras foram separadas em três grupos, para melhor representar a variabilidade existente nos solos da região. As funções de classificação foram obtidas com base nas variáveis Mn, Fe e Mg. Em geral, os grupos G1 e G2 apresentaram valores inferiores, em relação aos obtidos quando se utilizou o universo amostral. Enquanto que, G3 apresentou valores superiores. Os VRQs obtidos a partir de grupos de solos apresentaram diferenças substanciais que traduzem vantagens para o gerenciamento de áreas contaminadas da região.
650 $aCluster analysis
650 $aHeavy metals
650 $aMetal Pesado
650 $aMétodo de Análise
653 $aAnálise de agrupamento
653 $aValores orientadores
700 1 $aLIMA, E. S. A.
700 1 $aAMARAL SOBRINHO, N. M. B. do
700 1 $aZOFFOLI, H. J. de O.
700 1 $aPEREZ, D. V.
773 $tRevista Ciência Agronômica$gv. 49, n. 1, p. 1-10, jan./mar. 2018.
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Registro original: |
Embrapa Solos (CNPS) |
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
07/03/2017 |
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Data da última atualização: |
02/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
CUSTÓDIO, R. A.; ARAÚJO NETO, S. E. de A.; FERMINO JUNIOR, P. C. P.; ANDRADE NETO, R. de C.; SILVA, I. F. |
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Afiliação: |
Roberto Aparecido Custódio, Prefeitura de Ouro Preto (RO); Sebastião Elviro de Araújo Neto, Universidade Federal do Acre; Paulo César Poeta Fermino Junior, Universidade Federal de Santa Catarina; ROMEU DE CARVALHO ANDRADE NETO, CPAF-Acre; Irene Ferro Silva, Universidade Federal do Acre. |
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Título: |
Morpho-anatomy of leaves and yield of pineapple plant in intercropping with cassava. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Bioscience Journal, Uberlândia, v. 32, n. 4, p. 839-848, July/Aug. 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
The aims of this study were to evaluate the effects of shade in pineapple plant with cassava, on the yields of pineapple fruit sand cassava roots, on the morph-anatomical variation, damage by solar radiation and chlorophyll content of pineapple leaves. Pineapple plants were cultivated in plots comprising three parallel row sunder different shade conditions provided by cassava plants grown at various spacings within single rows located on either side of the plots. The experiment was of a randomized block design with five treatments (cassava spacings of 0.50, 0.75, 1.00 and 1.25 m and a pineapple monoculture) and four replications. Yields of fruits and roots, together with the morphological, chemical and histological characteristics of the "D" leaves of pineapple, were determined14 months after planting the pineapples plant. Data were submitted to analysis of variance with the Scott-Knott test or Friedman test (P< 0.05) and to regression analysis. Pineapple plants grown under the majority of shade conditions presented higher fruit weight and overall yield per hectare in comparison with plants grown in direct sunlight. The maximum productivities of pineapple fruit were achieved when cassava plants were spaced 0.75 m apart and, under these shade conditions, fruits were fully protected against burning by the sun. The ?D? leaves of shaded plants were longer and thicker, with higher content of chlorophyll a and total chlorophyll, reduced stomatal density and dimensions of stomatal pores, narrower guard cells, thinner aquiferous hypodermis, and reduced abaxial and adaxial epidermis. The yield of cassava roots per plant increased linearly with increasing distance between the plants, but the yield per hectare decreased with decreasing plant density. MenosThe aims of this study were to evaluate the effects of shade in pineapple plant with cassava, on the yields of pineapple fruit sand cassava roots, on the morph-anatomical variation, damage by solar radiation and chlorophyll content of pineapple leaves. Pineapple plants were cultivated in plots comprising three parallel row sunder different shade conditions provided by cassava plants grown at various spacings within single rows located on either side of the plots. The experiment was of a randomized block design with five treatments (cassava spacings of 0.50, 0.75, 1.00 and 1.25 m and a pineapple monoculture) and four replications. Yields of fruits and roots, together with the morphological, chemical and histological characteristics of the "D" leaves of pineapple, were determined14 months after planting the pineapples plant. Data were submitted to analysis of variance with the Scott-Knott test or Friedman test (P< 0.05) and to regression analysis. Pineapple plants grown under the majority of shade conditions presented higher fruit weight and overall yield per hectare in comparison with plants grown in direct sunlight. The maximum productivities of pineapple fruit were achieved when cassava plants were spaced 0.75 m apart and, under these shade conditions, fruits were fully protected against burning by the sun. The ?D? leaves of shaded plants were longer and thicker, with higher content of chlorophyll a and total chlorophyll, reduced stomatal density and dimensions of stomatal ... Mostrar Tudo |
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Palavras-Chave: |
Análise de variância; Análisis de regresión; Análisis de varianza; Análisis estadístico; Cultivo intercalar; Friedman Test; Morfoanatomia foliar; Piñas; Radiación solar; Rendimiento de los cultivos; Scott-Knott Test; Sistemas de cultivo; Sombra; Teste de Friedman; Teste de Scott-Knott; Yuca. |
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Thesagro: |
Abacaxi; Ananas comosus; Cultivo intercalado; Mandioca; Manihot esculenta; Método estatístico; Radiação solar; Rendimento; Sistema de cultivo; Sombreamento. |
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Thesaurus NAL: |
Analysis of variance; Cassava; Crop yield; Cropping systems; Intercropping; Pineapples; Regression analysis; Shade; Solar radiation; Statistical analysis. |
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Categoria do assunto: |
A Sistemas de Cultivo |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/157329/1/26268.pdf
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Marc: |
LEADER 03487naa a2200601 a 4500
001 2066474
005 2021-07-02
008 2016 bl uuuu u00u1 u #d
100 1 $aCUSTÓDIO, R. A.
245 $aMorpho-anatomy of leaves and yield of pineapple plant in intercropping with cassava.$h[electronic resource]
260 $c2016
520 $aThe aims of this study were to evaluate the effects of shade in pineapple plant with cassava, on the yields of pineapple fruit sand cassava roots, on the morph-anatomical variation, damage by solar radiation and chlorophyll content of pineapple leaves. Pineapple plants were cultivated in plots comprising three parallel row sunder different shade conditions provided by cassava plants grown at various spacings within single rows located on either side of the plots. The experiment was of a randomized block design with five treatments (cassava spacings of 0.50, 0.75, 1.00 and 1.25 m and a pineapple monoculture) and four replications. Yields of fruits and roots, together with the morphological, chemical and histological characteristics of the "D" leaves of pineapple, were determined14 months after planting the pineapples plant. Data were submitted to analysis of variance with the Scott-Knott test or Friedman test (P< 0.05) and to regression analysis. Pineapple plants grown under the majority of shade conditions presented higher fruit weight and overall yield per hectare in comparison with plants grown in direct sunlight. The maximum productivities of pineapple fruit were achieved when cassava plants were spaced 0.75 m apart and, under these shade conditions, fruits were fully protected against burning by the sun. The ?D? leaves of shaded plants were longer and thicker, with higher content of chlorophyll a and total chlorophyll, reduced stomatal density and dimensions of stomatal pores, narrower guard cells, thinner aquiferous hypodermis, and reduced abaxial and adaxial epidermis. The yield of cassava roots per plant increased linearly with increasing distance between the plants, but the yield per hectare decreased with decreasing plant density.
650 $aAnalysis of variance
650 $aCassava
650 $aCrop yield
650 $aCropping systems
650 $aIntercropping
650 $aPineapples
650 $aRegression analysis
650 $aShade
650 $aSolar radiation
650 $aStatistical analysis
650 $aAbacaxi
650 $aAnanas comosus
650 $aCultivo intercalado
650 $aMandioca
650 $aManihot esculenta
650 $aMétodo estatístico
650 $aRadiação solar
650 $aRendimento
650 $aSistema de cultivo
650 $aSombreamento
653 $aAnálise de variância
653 $aAnálisis de regresión
653 $aAnálisis de varianza
653 $aAnálisis estadístico
653 $aCultivo intercalar
653 $aFriedman Test
653 $aMorfoanatomia foliar
653 $aPiñas
653 $aRadiación solar
653 $aRendimiento de los cultivos
653 $aScott-Knott Test
653 $aSistemas de cultivo
653 $aSombra
653 $aTeste de Friedman
653 $aTeste de Scott-Knott
653 $aYuca
700 1 $aARAÚJO NETO, S. E. de A.
700 1 $aFERMINO JUNIOR, P. C. P.
700 1 $aANDRADE NETO, R. de C.
700 1 $aSILVA, I. F.
773 $tBioscience Journal, Uberlândia$gv. 32, n. 4, p. 839-848, July/Aug. 2016.
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Embrapa Acre (CPAF-AC) |
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