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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
14/03/2000 |
Data da última atualização: |
09/06/2018 |
Autoria: |
VASCONCELLOS, C. A.; PURCINO, H.; VIANNA, M. C. M.; FRANCA, C. C. M. |
Afiliação: |
EMBRAPA-CNPMS. |
Título: |
Resposta do Arachis pintoi a fosforo e a calcario em latossolo vermelho escuro da regiao de Sete Lagoas, MG, Brasil. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Pasturas Tropicales, Cali, v. 20, n. 3, p. 22-25, 1998. |
Idioma: |
Português |
Conteúdo: |
The response of Arachis pintoi to phosphorus (P) and lime was studied in a dark-red Latosol from Sete Lagoas, Minas Gerais, Brazil. The trial aimed to stabilize the critical level of P fertilization under controlled greenhouse conditions, using pots with 3 kg of soil. Composite treatment were applied consisting of five levels of P, four levels of lime, and two harvests. At harvest, Arachis production was higher in P treatments compared with lime treatments. It was possible to determine the type of P response based on the fixed regression between Arachis dry matter content and available P Mehlich-1, indicating that the critical P level was 9 mg/kg. No significant interaction was found between P and lime treatments. With the maximum P content in leaves (0,18 dag/kg), it was possible to stabilize the preliminary nutritional levels in A. pintoi as follows: N, -3,2 dag/kg; K, -3 dag/kg; Ca, 2,2 dag/kg; Mg, 0,6 dag/kg; Cu, 14 mg/kg; and Zn, 30 mg/kg. |
Palavras-Chave: |
Brasil; Cacareous; Leguminosas; Mineral nutrition; Nutricao mineral; Sete Lagoas; Soil deterioration; Solo degradado. |
Thesagro: |
Cálcio; Cerrado; Fósforo. |
Thesaurus Nal: |
Arachis pintoi; Brazil; phosphorus. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01868naa a2200325 a 4500 001 1483494 005 2018-06-09 008 1998 bl uuuu u00u1 u #d 100 1 $aVASCONCELLOS, C. A. 245 $aResposta do Arachis pintoi a fosforo e a calcario em latossolo vermelho escuro da regiao de Sete Lagoas, MG, Brasil.$h[electronic resource] 260 $c1998 520 $aThe response of Arachis pintoi to phosphorus (P) and lime was studied in a dark-red Latosol from Sete Lagoas, Minas Gerais, Brazil. The trial aimed to stabilize the critical level of P fertilization under controlled greenhouse conditions, using pots with 3 kg of soil. Composite treatment were applied consisting of five levels of P, four levels of lime, and two harvests. At harvest, Arachis production was higher in P treatments compared with lime treatments. It was possible to determine the type of P response based on the fixed regression between Arachis dry matter content and available P Mehlich-1, indicating that the critical P level was 9 mg/kg. No significant interaction was found between P and lime treatments. With the maximum P content in leaves (0,18 dag/kg), it was possible to stabilize the preliminary nutritional levels in A. pintoi as follows: N, -3,2 dag/kg; K, -3 dag/kg; Ca, 2,2 dag/kg; Mg, 0,6 dag/kg; Cu, 14 mg/kg; and Zn, 30 mg/kg. 650 $aArachis pintoi 650 $aBrazil 650 $aphosphorus 650 $aCálcio 650 $aCerrado 650 $aFósforo 653 $aBrasil 653 $aCacareous 653 $aLeguminosas 653 $aMineral nutrition 653 $aNutricao mineral 653 $aSete Lagoas 653 $aSoil deterioration 653 $aSolo degradado 700 1 $aPURCINO, H. 700 1 $aVIANNA, M. C. M. 700 1 $aFRANCA, C. C. M. 773 $tPasturas Tropicales, Cali$gv. 20, n. 3, p. 22-25, 1998.
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Embrapa Milho e Sorgo (CNPMS) |
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Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
03/10/2016 |
Data da última atualização: |
17/01/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
REZENDE, L. F. C.; ARENQUE-MUSA, B. C.; MOURA, M. S. B. de; AIDAR, S. de T.; RANDOW, C. V.; MENEZES, R. S. C.; OMETTO, J. P. B. H. |
Afiliação: |
L. F. C. REZENDE, INPE; B. C. ARENQUE-MUSA, USP; MAGNA SOELMA BESERRA DE MOURA, CPATSA; SAULO DE TARSO AIDAR, CPATSA; C. VON RANDOW, INPE; R. S. C. MENEZES, UFPE; J. P. B. H. OMETTO, INPE. |
Título: |
Calibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian Semiarid region, for use in Dynamic Global Vegetation Models. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Brazilian Journal of Biology, v. 76, n. 2, p. 341-351, 2016. |
DOI: |
10.1590/1519-6984.14414 |
Idioma: |
Inglês |
Conteúdo: |
The semiarid region of northeastern Brazil, the Caatinga, is extremely important due to its biodiversity and endemism. Measurements of plant physiology are crucial to the calibration of Dynamic Global Vegetation Models (DGVMs) that are currently used to simulate the responses of vegetation in face of global changes. In a field work realized in an area of preserved Caatinga forest located in Petrolina, Pernambuco, measurements of carbon assimilation (in response to light and CO2) were performed on 11 individuals of Poincianella microphylla, a native species that is abundant in this region. These data were used to calibrate the maximum carboxylation velocity (Vcmax) used in the INLAND model. The calibration techniques used were Multiple Linear Regression (MLR), and data mining techniques as the Classification And Regression Tree (CART) and K-MEANS. The results were compared to the UNCALIBRATED model. It was found that simulated Gross Primary Productivity (GPP) reached 72% of observed GPP when using the calibrated Vcmax values, whereas the UNCALIBRATED approach accounted for 42% of observed GPP. Thus, this work shows the benefits of calibrating DGVMs using field ecophysiological measurements, especially in areas where field data is scarce or non-existent, such as in the Caatinga |
Palavras-Chave: |
DGVMs; Dynamic global vegetation models; Modelos de Vegetação Globais Dinâmicos; Mudanças Climáticas; Natural resource; Produtividade primária bruta. |
Thesagro: |
Biodiversidade; Caatinga; Vegetação. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/148208/1/Magna-3.pdf
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Marc: |
LEADER 02378naa a2200313 a 4500 001 2053978 005 2017-01-17 008 2016 bl uuuu u00u1 u #d 024 7 $a10.1590/1519-6984.14414$2DOI 100 1 $aREZENDE, L. F. C. 245 $aCalibration of the maximum carboxylation velocity (Vcmax) using data mining techniques and ecophysiological data from the Brazilian Semiarid region, for use in Dynamic Global Vegetation Models.$h[electronic resource] 260 $c2016 520 $aThe semiarid region of northeastern Brazil, the Caatinga, is extremely important due to its biodiversity and endemism. Measurements of plant physiology are crucial to the calibration of Dynamic Global Vegetation Models (DGVMs) that are currently used to simulate the responses of vegetation in face of global changes. In a field work realized in an area of preserved Caatinga forest located in Petrolina, Pernambuco, measurements of carbon assimilation (in response to light and CO2) were performed on 11 individuals of Poincianella microphylla, a native species that is abundant in this region. These data were used to calibrate the maximum carboxylation velocity (Vcmax) used in the INLAND model. The calibration techniques used were Multiple Linear Regression (MLR), and data mining techniques as the Classification And Regression Tree (CART) and K-MEANS. The results were compared to the UNCALIBRATED model. It was found that simulated Gross Primary Productivity (GPP) reached 72% of observed GPP when using the calibrated Vcmax values, whereas the UNCALIBRATED approach accounted for 42% of observed GPP. Thus, this work shows the benefits of calibrating DGVMs using field ecophysiological measurements, especially in areas where field data is scarce or non-existent, such as in the Caatinga 650 $aBiodiversidade 650 $aCaatinga 650 $aVegetação 653 $aDGVMs 653 $aDynamic global vegetation models 653 $aModelos de Vegetação Globais Dinâmicos 653 $aMudanças Climáticas 653 $aNatural resource 653 $aProdutividade primária bruta 700 1 $aARENQUE-MUSA, B. C. 700 1 $aMOURA, M. S. B. de 700 1 $aAIDAR, S. de T. 700 1 $aRANDOW, C. V. 700 1 $aMENEZES, R. S. C. 700 1 $aOMETTO, J. P. B. H. 773 $tBrazilian Journal of Biology$gv. 76, n. 2, p. 341-351, 2016.
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