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| 77. | | VARGAS, V. P; CANTARELLA, H.; MARTINS, A. A; SOARES, J. R; CARMO, J. B.; ANDRADE, C. A. de. Sugarcane crop residue increases N2O and CO2 emissions under high soil moisture conditions. Sugar Tech, New Delhi, v. 16, n. 2, p. 174?179, 2014.| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 138 | |
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Registro Completo
|
Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
13/02/2014 |
|
Data da última atualização: |
13/02/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 2 |
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Autoria: |
VARGAS, V. P; CANTARELLA, H.; MARTINS, A. A; SOARES, J. R; CARMO, J. B.; ANDRADE, C. A. de. |
|
Afiliação: |
VITOR PAULO VARGAS, IAC; HEITOR CANTARELLA, IAC; ACACIO AGOSTINHO MARTINS, IAC; JOHNNY RODRIGUES SOARES, IAC; JANAINA BRAGA DO CARMO, UFSCar; CRISTIANO ALBERTO DE ANDRADE, CNPMA. |
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Título: |
Sugarcane crop residue increases N2O and CO2 emissions under high soil moisture conditions. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Sugar Tech, New Delhi, v. 16, n. 2, p. 174?179, 2014. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Sugarcane crop residues from green cane harvests may affect the greenhouse gas fluxes from the soils. Therefore, it is important to understand how changes in soil moisture covered with cane trash alter the N2O and CO2 emission. The aim of this study was to evaluate N2O and CO2 emission from repacked soil columns incubated with (16 Mg ha-1) or without crop residues and N fertilizer (0 or 2.1 g N m-2), and as a function of four soil moisture levels (25, 50, 75 and 100 % of water holding capacity). For gas samplings, the columns were closed with a lid and four gas samples were taken in 20 min. The N2O fluxes increased linearly (p < 0.01) with increasing soil moisture regardless of the residue application on soil. However in the columns with trash the moisture effect, on N2O emission rates, was two-fold greater. Every 10 % increase in moisture in relation to the holding capacity resulted in losses equivalent to 790 and 1,640 Mg N m-2 for the 0 and 16 Mg ha-1 crop residue rates, respectively. In conditions of low moisture (25 and 50 %), the crop residue did not increase emissions compared to the bare soil. The CO2 emission also was linearly stimulated with increasing soil moisture, regardless of crop residue application. However, the CO2 emission rate was higher with the residue. Our study indicates that the effects of crop residue on greenhouse gas emissions are exacerbated in periods with high soil moisture. |
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Palavras-Chave: |
Cana-de-açúcar; N application; Soil columns. |
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Thesagro: |
Dióxido de carbono; Efeito estufa; Impacto ambiental; Metano; Palhada; Solo. |
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Thesaurus NAL: |
Greenhouse gases; Methane; Soil respiration; Straw; Sugarcane. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 02371naa a2200349 a 4500
001 1979771
005 2014-02-13
008 2014 bl uuuu u00u1 u #d
100 1 $aVARGAS, V. P
245 $aSugarcane crop residue increases N2O and CO2 emissions under high soil moisture conditions.$h[electronic resource]
260 $c2014
520 $aSugarcane crop residues from green cane harvests may affect the greenhouse gas fluxes from the soils. Therefore, it is important to understand how changes in soil moisture covered with cane trash alter the N2O and CO2 emission. The aim of this study was to evaluate N2O and CO2 emission from repacked soil columns incubated with (16 Mg ha-1) or without crop residues and N fertilizer (0 or 2.1 g N m-2), and as a function of four soil moisture levels (25, 50, 75 and 100 % of water holding capacity). For gas samplings, the columns were closed with a lid and four gas samples were taken in 20 min. The N2O fluxes increased linearly (p < 0.01) with increasing soil moisture regardless of the residue application on soil. However in the columns with trash the moisture effect, on N2O emission rates, was two-fold greater. Every 10 % increase in moisture in relation to the holding capacity resulted in losses equivalent to 790 and 1,640 Mg N m-2 for the 0 and 16 Mg ha-1 crop residue rates, respectively. In conditions of low moisture (25 and 50 %), the crop residue did not increase emissions compared to the bare soil. The CO2 emission also was linearly stimulated with increasing soil moisture, regardless of crop residue application. However, the CO2 emission rate was higher with the residue. Our study indicates that the effects of crop residue on greenhouse gas emissions are exacerbated in periods with high soil moisture.
650 $aGreenhouse gases
650 $aMethane
650 $aSoil respiration
650 $aStraw
650 $aSugarcane
650 $aDióxido de carbono
650 $aEfeito estufa
650 $aImpacto ambiental
650 $aMetano
650 $aPalhada
650 $aSolo
653 $aCana-de-açúcar
653 $aN application
653 $aSoil columns
700 1 $aCANTARELLA, H.
700 1 $aMARTINS, A. A
700 1 $aSOARES, J. R
700 1 $aCARMO, J. B.
700 1 $aANDRADE, C. A. de
773 $tSugar Tech, New Delhi$gv. 16, n. 2, p. 174?179, 2014.
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