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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
04/12/2023 |
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Data da última atualização: |
04/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ASPEREN, H. van; ALVES-OLIVEIRA, J. R.; WARNEKE, T.; FORSBERG, B.; ARAUJO, A. C. de; NOTHOLT, J. |
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Afiliação: |
HELLA VAN ASPEREN, University of Bremen; JOÃO RAFAEL ALVES-OLIVEIRA, INPA; THORSTEN WARNEKE, University of Bremen; BRUCE FORSBERG, INPA; ALESSANDRO CARIOCA DE ARAUJO, CPATU; JUSTUS NOTHOLT, University of Bremen. |
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Título: |
The role of termite CH4 emissions on the ecosystem scale: a case study in the Amazon rainforest. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Biogeosciences, v. 18, p. 2609-2625, 2021. |
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DOI: |
https://doi.org/10.5194/bg-18-2609-2021 |
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Idioma: |
Inglês |
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Conteúdo: |
The magnitude of termite methane (CH4) emissions is still an uncertain part of the global CH4 budget and current emission estimates are based on limited field studies. We present in situ CH4 emission measurements of termite mounds and termite mound subsamples performed in the Amazon rainforest. Emissions from five termite mounds of the species Neocapritermes brasiliensis were measured by use of a large flux chamber connected to a portable gas analyser measuring CH4 and CO2. In addition, the emissions of mound subsamples were measured, after which the termites were counted so that a termite CH4 and CO2 emission factor could be determined. Mound emissions were found to range between 17.0 and for CH4 and between 1.1 and for CO2. A termite emission factor of was found, which is almost twice as high as the only other reported value for the Amazon. By combining mound emission measurements with the termite emission factor, colony sizes could be estimated, which were found to range between 55?125 thousand individuals. Estimates were similar to literature values, and we therefore propose that this method can be used as a quick non-intrusive method to estimate termite colony size in the field. The role of termites in the ecosystem's CH4 budget was evaluated by use of two approaches. Termite mound emission values were combined with local mound density numbers, leading to an estimate of , on average, emitted by termite mounds. In addition, the termite CH4 emission factor from this study was combined with termite biomass numbers, resulting in an estimate of termite-emitted CH4 of . Considering the relatively low net CH4 emissions previously measured at this ecosystem, we expect that termites play an important role in the CH4 budget of this terra firme ecosystem. MenosThe magnitude of termite methane (CH4) emissions is still an uncertain part of the global CH4 budget and current emission estimates are based on limited field studies. We present in situ CH4 emission measurements of termite mounds and termite mound subsamples performed in the Amazon rainforest. Emissions from five termite mounds of the species Neocapritermes brasiliensis were measured by use of a large flux chamber connected to a portable gas analyser measuring CH4 and CO2. In addition, the emissions of mound subsamples were measured, after which the termites were counted so that a termite CH4 and CO2 emission factor could be determined. Mound emissions were found to range between 17.0 and for CH4 and between 1.1 and for CO2. A termite emission factor of was found, which is almost twice as high as the only other reported value for the Amazon. By combining mound emission measurements with the termite emission factor, colony sizes could be estimated, which were found to range between 55?125 thousand individuals. Estimates were similar to literature values, and we therefore propose that this method can be used as a quick non-intrusive method to estimate termite colony size in the field. The role of termites in the ecosystem's CH4 budget was evaluated by use of two approaches. Termite mound emission values were combined with local mound density numbers, leading to an estimate of , on average, emitted by termite mounds. In addition, the termite CH4 emission factor from this study... Mostrar Tudo |
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Thesagro: |
Floresta Tropical. |
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Thesaurus Nal: |
Forestry. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159139/1/The-role-of-termite-CH4.pdf
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Marc: |
LEADER 02442naa a2200217 a 4500
001 2159139
005 2023-12-04
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.5194/bg-18-2609-2021$2DOI
100 1 $aASPEREN, H. van
245 $aThe role of termite CH4 emissions on the ecosystem scale$ba case study in the Amazon rainforest.$h[electronic resource]
260 $c2021
520 $aThe magnitude of termite methane (CH4) emissions is still an uncertain part of the global CH4 budget and current emission estimates are based on limited field studies. We present in situ CH4 emission measurements of termite mounds and termite mound subsamples performed in the Amazon rainforest. Emissions from five termite mounds of the species Neocapritermes brasiliensis were measured by use of a large flux chamber connected to a portable gas analyser measuring CH4 and CO2. In addition, the emissions of mound subsamples were measured, after which the termites were counted so that a termite CH4 and CO2 emission factor could be determined. Mound emissions were found to range between 17.0 and for CH4 and between 1.1 and for CO2. A termite emission factor of was found, which is almost twice as high as the only other reported value for the Amazon. By combining mound emission measurements with the termite emission factor, colony sizes could be estimated, which were found to range between 55?125 thousand individuals. Estimates were similar to literature values, and we therefore propose that this method can be used as a quick non-intrusive method to estimate termite colony size in the field. The role of termites in the ecosystem's CH4 budget was evaluated by use of two approaches. Termite mound emission values were combined with local mound density numbers, leading to an estimate of , on average, emitted by termite mounds. In addition, the termite CH4 emission factor from this study was combined with termite biomass numbers, resulting in an estimate of termite-emitted CH4 of . Considering the relatively low net CH4 emissions previously measured at this ecosystem, we expect that termites play an important role in the CH4 budget of this terra firme ecosystem.
650 $aForestry
650 $aFloresta Tropical
700 1 $aALVES-OLIVEIRA, J. R.
700 1 $aWARNEKE, T.
700 1 $aFORSBERG, B.
700 1 $aARAUJO, A. C. de
700 1 $aNOTHOLT, J.
773 $tBiogeosciences$gv. 18, p. 2609-2625, 2021.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
16/04/2024 |
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Data da última atualização: |
16/04/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 3 |
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Autoria: |
SILVA, C. S. R. de A.; ARAUJO, E. da S.; COSTA, L. S.; ARAUJO, S. N. de; SILVA JUNIOR, J. B. da; ZIVIANI, M. M.; SILVA, M. S. R. de A. da; GUERRA, J. G. M.; ESPINDOLA, J. A. A.; PINHEIRO, E. F. M. |
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Afiliação: |
CAMILLA SANTOS REIS DE ANDRADE DA SILVA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; EDNALDO DA SILVA ARAUJO, CNPAB; LUANA SOUSA COSTA, UNIVERSIDADE FEDERAL DE LAVRAS; SUELLEN NUNES DE ARAÚJO, UNIVERSIDADE FEDERAL RURAL DA AMAZÔNIA; JANDER BARBOSA DA SILVA JUNIOR, INSTITUTO NACIONAL DE PESQUISAS DA AMAZONIA; MELANIA MERLO ZIVIANI, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; MAURA SANTOS REIS DE ANDRADE DA SILVA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; JOSE GUILHERME MARINHO GUERRA, CNPAB; JOSE ANTONIO AZEVEDO ESPINDOLA, CNPAB; ÉRIKA FLÁVIA MACHADO PINHEIRO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
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Título: |
No-till system organic vegetable production under green manure: effect on yield and soil properties. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Organic Agriculture, Published: 23 March 2024. |
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ISSN: |
1879-4238 |
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DOI: |
https://doi.org/10.1007/s13165-024-00460-x |
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Idioma: |
Inglês |
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Conteúdo: |
n horticulture, the commonly applied agricultural practice of soil tillage often favours soil degradation. Even under organic cultivation, agricultural mechanization can stimulate organic matter mineralization and, consequently, cause soil quality losses. To maintain the soil properties in this production system, it is imperative to adopt a management system that minimizes soil disturbance, avoiding aggregate breakdown and exposure of organic matter to oxidation. This study evaluated the effect of different organic soil management systems on vegetable yield and the physical, chemical and biological properties that define soil quality. Three soil management systems were evaluated: NT- no-till system; CT-RH—conventional tillage with a rotary hoe; and CT-PH- conventional tillage, ploughing and harrowing. Soil aggregation, organic carbon (C) content in aggregates, penetration resistance, gravimetric moisture, organic matter light fraction, soil carbon, epigeal fauna and edaphic macrofauna were evaluated. The study showed that vegetable yields were similar in the different management systems; penetration resistance was the most sensitive physical indicator of soil management; carbon contents in soil macroaggregates and free light fraction (FLF) were the most sensitive chemical indicators to differentiate organic management systems in the soil surface layer. The highest FLF and C contents in soil macroaggregates were observed under CT-RH, followed by NT; the NT system promoted a greater density and richness of soil faunal groups, and multivariate analysis indicated a higher correlation with these biological properties. In conclusion, vegetable crop yields did not differ among the organic production management systems. Menosn horticulture, the commonly applied agricultural practice of soil tillage often favours soil degradation. Even under organic cultivation, agricultural mechanization can stimulate organic matter mineralization and, consequently, cause soil quality losses. To maintain the soil properties in this production system, it is imperative to adopt a management system that minimizes soil disturbance, avoiding aggregate breakdown and exposure of organic matter to oxidation. This study evaluated the effect of different organic soil management systems on vegetable yield and the physical, chemical and biological properties that define soil quality. Three soil management systems were evaluated: NT- no-till system; CT-RH—conventional tillage with a rotary hoe; and CT-PH- conventional tillage, ploughing and harrowing. Soil aggregation, organic carbon (C) content in aggregates, penetration resistance, gravimetric moisture, organic matter light fraction, soil carbon, epigeal fauna and edaphic macrofauna were evaluated. The study showed that vegetable yields were similar in the different management systems; penetration resistance was the most sensitive physical indicator of soil management; carbon contents in soil macroaggregates and free light fraction (FLF) were the most sensitive chemical indicators to differentiate organic management systems in the soil surface layer. The highest FLF and C contents in soil macroaggregates were observed under CT-RH, followed by NT; the NT system promoted a g... Mostrar Tudo |
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Thesaurus NAL: |
Horticulture; Soil aggregation; Soil fauna; Soil organic matter; Soil quality. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02698naa a2200313 a 4500
001 2163649
005 2024-04-16
008 2024 bl uuuu u00u1 u #d
022 $a1879-4238
024 7 $ahttps://doi.org/10.1007/s13165-024-00460-x$2DOI
100 1 $aSILVA, C. S. R. de A.
245 $aNo-till system organic vegetable production under green manure$beffect on yield and soil properties.$h[electronic resource]
260 $c2024
520 $an horticulture, the commonly applied agricultural practice of soil tillage often favours soil degradation. Even under organic cultivation, agricultural mechanization can stimulate organic matter mineralization and, consequently, cause soil quality losses. To maintain the soil properties in this production system, it is imperative to adopt a management system that minimizes soil disturbance, avoiding aggregate breakdown and exposure of organic matter to oxidation. This study evaluated the effect of different organic soil management systems on vegetable yield and the physical, chemical and biological properties that define soil quality. Three soil management systems were evaluated: NT- no-till system; CT-RH—conventional tillage with a rotary hoe; and CT-PH- conventional tillage, ploughing and harrowing. Soil aggregation, organic carbon (C) content in aggregates, penetration resistance, gravimetric moisture, organic matter light fraction, soil carbon, epigeal fauna and edaphic macrofauna were evaluated. The study showed that vegetable yields were similar in the different management systems; penetration resistance was the most sensitive physical indicator of soil management; carbon contents in soil macroaggregates and free light fraction (FLF) were the most sensitive chemical indicators to differentiate organic management systems in the soil surface layer. The highest FLF and C contents in soil macroaggregates were observed under CT-RH, followed by NT; the NT system promoted a greater density and richness of soil faunal groups, and multivariate analysis indicated a higher correlation with these biological properties. In conclusion, vegetable crop yields did not differ among the organic production management systems.
650 $aHorticulture
650 $aSoil aggregation
650 $aSoil fauna
650 $aSoil organic matter
650 $aSoil quality
700 1 $aARAUJO, E. da S.
700 1 $aCOSTA, L. S.
700 1 $aARAUJO, S. N. de
700 1 $aSILVA JUNIOR, J. B. da
700 1 $aZIVIANI, M. M.
700 1 $aSILVA, M. S. R. de A. da
700 1 $aGUERRA, J. G. M.
700 1 $aESPINDOLA, J. A. A.
700 1 $aPINHEIRO, E. F. M.
773 $tOrganic Agriculture, Published: 23 March 2024.
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