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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Agropecuária Oeste; Embrapa Amapá; Embrapa Meio-Norte; Embrapa Semiárido; Embrapa Tabuleiros Costeiros; Embrapa Unidades Centrais. |
Data corrente: |
17/09/1998 |
Data da última atualização: |
05/10/2016 |
Autoria: |
CARVALHO, H. W. L. de; LEAL, M. de L. da S.; SANTOS, M. X. dos. |
Afiliação: |
HELIO WILSON LEMOS DE CARVALHO, CPATC. |
Título: |
Ciclo XI de seleção entre e dentro de progênies de meios-irmãos na variedade de milho BR 5028 - São Francisco. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Aracaju: Embrapa-CPATC, 1998. |
Páginas: |
6 p. |
Série: |
(Embrapa-CPATC. Pesquisa em Andamento, 51). |
Idioma: |
Português |
Palavras-Chave: |
BR 5028 São Francisco; Cultura; Genetics improvement; Maize; Melhoramento genético; São Francisco; Selection; Variedade SAo Francisco. |
Thesagro: |
Espiga; Milho; Progênie; Seleção; Variedade; Zea Mays. |
Thesaurus Nal: |
breeding; progeny; varieties. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/91264/1/CPATC-PESQ.-AND.-51-98.pdf
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Marc: |
LEADER 00970nam a2200349 a 4500 001 1359663 005 2016-10-05 008 1998 bl uuuu u0uu1 u #d 100 1 $aCARVALHO, H. W. L. de 245 $aCiclo XI de seleção entre e dentro de progênies de meios-irmãos na variedade de milho BR 5028 - São Francisco. 260 $aAracaju: Embrapa-CPATC$c1998 300 $a6 p. 490 $a(Embrapa-CPATC. Pesquisa em Andamento, 51). 650 $abreeding 650 $aprogeny 650 $avarieties 650 $aEspiga 650 $aMilho 650 $aProgênie 650 $aSeleção 650 $aVariedade 650 $aZea Mays 653 $aBR 5028 São Francisco 653 $aCultura 653 $aGenetics improvement 653 $aMaize 653 $aMelhoramento genético 653 $aSão Francisco 653 $aSelection 653 $aVariedade SAo Francisco 700 1 $aLEAL, M. de L. da S. 700 1 $aSANTOS, M. X. dos
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Registro original: |
Embrapa Tabuleiros Costeiros (CPATC) |
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Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão; Embrapa Meio Ambiente. |
Data corrente: |
06/03/2015 |
Data da última atualização: |
18/03/2015 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 3 |
Autoria: |
CARVALHO, M. T. de M.; MAIA, A. de H. N.; MADARI, B. E.; BASTIAANS, L.; VAN OORT, P. A. J.; HEINEMANN, A. B.; SILVA, M. A. S. da; PETTER, F. A.; MARIMON JUNIOR, B. H.; MEINKE, H. |
Afiliação: |
MARCIA THAIS DE MELO CARVALHO, CNPAF; ALINE DE HOLANDA NUNES MAIA, CNPMA; BEATA EMOKE MADARI, CNPAF; LAMMERT BASTIAANS, Wageningen University; PEPIJN A J VAN OORT, Wageningen University; ALEXANDRE BRYAN HEINEMANN, CNPAF; MELLISSA ANANIAS SOLER DA SILVA, CNPAF; FABIANO ANDRE PETTER, UFMT; B H MARIMON JUNIOR, UFMT; H MEINKE, Wageningen University. |
Título: |
Biochar increases plant-available water in a sandy loam soil under an aerobic rice crop system. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Solid Earth, Göttingen, v. 5, p. 939-952, 2014. |
DOI: |
10.5194/se-5-939-2014 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The main objective of this study was to assess the impact of biochar rate (0, 8, 16 and 32 Mg ha-1) on the water retention capacity (WRC) of a sandy loam Dystric Plinthosol. The applied biochar was a by-product of slow pyrolysis (~450 °C) of eucalyptus wood, milled to pass through a 2000 micrometers sieve that resulted in a material with an intrinsic porosity less than or equal to 10 micrometers and a specific surface area of ~3.2 m2 g-1. The biochar was incorporated into the top 15 cm of the soil under an aerobic rice system. Our study focused on both the effects on WRC and rice yields 2 and 3 years after its application. Undisturbed soil samples were collected from 16 plots in two soil layers (5-10 and 15-20 cm). Soil water retention curves were modelled using a nonlinear mixed model which appropriately accounts for uncertainties inherent of spatial variability and repeated measurements taken within a specific soil sample. We found an increase in plant-available water in the upper soil layer proportional to the rate of biochar, with about 0.8% for each Mg ha-1 biochar amendment 2 and 3 years after its application. The impact of biochar on soil WRC was most likely related to an effect in overall porosity of the sandy loam soil, which was evident from an increase in saturated soil moisture and macro porosity with 0.5 and 1.6% for each Mg ha-1 of biochar applied, respectively. The increment in soil WRC did not translate into an increase in rice yield, essentially because in both seasons the amount of rainfall during the critical period for rice production exceeded 650 mm. The use of biochar as a soil amendment can be a worthy strategy to guarantee yield stability under short-term water-limited conditions. Our findings raise the importance of assessing the feasibility of very high application rates of biochar and the inclusion of a detailed analysis of its physical and chemical properties as part of future investigations. MenosAbstract: The main objective of this study was to assess the impact of biochar rate (0, 8, 16 and 32 Mg ha-1) on the water retention capacity (WRC) of a sandy loam Dystric Plinthosol. The applied biochar was a by-product of slow pyrolysis (~450 °C) of eucalyptus wood, milled to pass through a 2000 micrometers sieve that resulted in a material with an intrinsic porosity less than or equal to 10 micrometers and a specific surface area of ~3.2 m2 g-1. The biochar was incorporated into the top 15 cm of the soil under an aerobic rice system. Our study focused on both the effects on WRC and rice yields 2 and 3 years after its application. Undisturbed soil samples were collected from 16 plots in two soil layers (5-10 and 15-20 cm). Soil water retention curves were modelled using a nonlinear mixed model which appropriately accounts for uncertainties inherent of spatial variability and repeated measurements taken within a specific soil sample. We found an increase in plant-available water in the upper soil layer proportional to the rate of biochar, with about 0.8% for each Mg ha-1 biochar amendment 2 and 3 years after its application. The impact of biochar on soil WRC was most likely related to an effect in overall porosity of the sandy loam soil, which was evident from an increase in saturated soil moisture and macro porosity with 0.5 and 1.6% for each Mg ha-1 of biochar applied, respectively. The increment in soil WRC did not translate into an increase in rice yield, essentially be... Mostrar Tudo |
Palavras-Chave: |
Biocarvão. |
Thesagro: |
Arroz; Carvão; Oryza Sativa; Retenção de água no solo; Solo arenoso. |
Thesaurus NAL: |
Biochar; Rice; Sandy loam soils; Soil water retention. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/120612/1/CNPAF-2014se.pdf
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Marc: |
LEADER 02987naa a2200361 a 4500 001 2011709 005 2015-03-18 008 2014 bl uuuu u00u1 u #d 024 7 $a10.5194/se-5-939-2014$2DOI 100 1 $aCARVALHO, M. T. de M. 245 $aBiochar increases plant-available water in a sandy loam soil under an aerobic rice crop system.$h[electronic resource] 260 $c2014 520 $aAbstract: The main objective of this study was to assess the impact of biochar rate (0, 8, 16 and 32 Mg ha-1) on the water retention capacity (WRC) of a sandy loam Dystric Plinthosol. The applied biochar was a by-product of slow pyrolysis (~450 °C) of eucalyptus wood, milled to pass through a 2000 micrometers sieve that resulted in a material with an intrinsic porosity less than or equal to 10 micrometers and a specific surface area of ~3.2 m2 g-1. The biochar was incorporated into the top 15 cm of the soil under an aerobic rice system. Our study focused on both the effects on WRC and rice yields 2 and 3 years after its application. Undisturbed soil samples were collected from 16 plots in two soil layers (5-10 and 15-20 cm). Soil water retention curves were modelled using a nonlinear mixed model which appropriately accounts for uncertainties inherent of spatial variability and repeated measurements taken within a specific soil sample. We found an increase in plant-available water in the upper soil layer proportional to the rate of biochar, with about 0.8% for each Mg ha-1 biochar amendment 2 and 3 years after its application. The impact of biochar on soil WRC was most likely related to an effect in overall porosity of the sandy loam soil, which was evident from an increase in saturated soil moisture and macro porosity with 0.5 and 1.6% for each Mg ha-1 of biochar applied, respectively. The increment in soil WRC did not translate into an increase in rice yield, essentially because in both seasons the amount of rainfall during the critical period for rice production exceeded 650 mm. The use of biochar as a soil amendment can be a worthy strategy to guarantee yield stability under short-term water-limited conditions. Our findings raise the importance of assessing the feasibility of very high application rates of biochar and the inclusion of a detailed analysis of its physical and chemical properties as part of future investigations. 650 $aBiochar 650 $aRice 650 $aSandy loam soils 650 $aSoil water retention 650 $aArroz 650 $aCarvão 650 $aOryza Sativa 650 $aRetenção de água no solo 650 $aSolo arenoso 653 $aBiocarvão 700 1 $aMAIA, A. de H. N. 700 1 $aMADARI, B. E. 700 1 $aBASTIAANS, L. 700 1 $aVAN OORT, P. A. J. 700 1 $aHEINEMANN, A. B. 700 1 $aSILVA, M. A. S. da 700 1 $aPETTER, F. A. 700 1 $aMARIMON JUNIOR, B. H. 700 1 $aMEINKE, H. 773 $tSolid Earth, Göttingen$gv. 5, p. 939-952, 2014.
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Embrapa Arroz e Feijão (CNPAF) |
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