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Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
16/05/2000 |
Data da última atualização: |
14/02/2012 |
Autoria: |
OLIVEIRA, L. A. de; GUITTON, T. L.; MOREIRA, F. W. |
Título: |
Relações entre as colonizações por fungos micorrízicos arbusculares e teores de nutrientes foliares em oito espécies florestais da Amazônia. |
Ano de publicação: |
1999 |
Fonte/Imprenta: |
Acta Amazonica, Manaus, v. 29, n. 2, p. 183-193, jun. 1999. |
ISSN: |
0044-5967 |
Idioma: |
Português |
Palavras-Chave: |
Abiurana; Piquia. |
Thesagro: |
Andiroba; Cardeiro; Cedrorana; Cumaru; Fertilidade; Jacareúba; Nutrição; Planta; Solo. |
Thesaurus Nal: |
plant nutrition; soil fertility. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00842naa a2200301 a 4500 001 1281208 005 2012-02-14 008 1999 bl uuuu u00u1 u #d 022 $a0044-5967 100 1 $aOLIVEIRA, L. A. de 245 $aRelações entre as colonizações por fungos micorrízicos arbusculares e teores de nutrientes foliares em oito espécies florestais da Amazônia. 260 $c1999 650 $aplant nutrition 650 $asoil fertility 650 $aAndiroba 650 $aCardeiro 650 $aCedrorana 650 $aCumaru 650 $aFertilidade 650 $aJacareúba 650 $aNutrição 650 $aPlanta 650 $aSolo 653 $aAbiurana 653 $aPiquia 700 1 $aGUITTON, T. L. 700 1 $aMOREIRA, F. W. 773 $tActa Amazonica, Manaus$gv. 29, n. 2, p. 183-193, jun. 1999.
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Embrapa Florestas (CNPF) |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
13/02/2014 |
Data da última atualização: |
13/02/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 2 |
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. |
Título: |
Sugarcane crop residue increases N2O and CO2 emissions under high soil moisture conditions. |
Ano de publicação: |
2014 |
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. |
Palavras-Chave: |
Cana-de-açúcar; N application; Soil columns. |
Thesagro: |
Dióxido de carbono; Efeito estufa; Impacto ambiental; Metano; Palhada; Solo. |
Thesaurus NAL: |
Greenhouse gases; Methane; Soil respiration; Straw; Sugarcane. |
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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