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| Registros recuperados: 16 | |
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| LIMA, M. A. de; VIEIRA, R. F.; FRIGHETTO, R. T. S.; LUIZ, A. J. B.; VILLELA, O. V.. |
| Abstract: Local greenhouse gas flow measurement studies have been encouraged at a global level as a subsidy for national and state inventories. This study aimed to evaluate the seasonal methane emission during the 2008/2009 harvest, from an irrigated rice plantation, under pre-germinated system, in the municipality of Tremembé, State of São Paulo, using the static chamber technique and gas chromatography. The study showed high seasonal emission of methane (CH4) for the studied area, probably due to the long flooding period. It was estimated the CH4 emission factor (6.51 kg CH4 ha-1 dia-1), the partial global warming potential (pGWP, 27.2 Mg CO2eq growing season-1 ha-1) and the yield-scaled pGWP (YpGWP, 3.9 kg CO2eq kg-1 grain). ? Resumo: Estudos locais de... |
| Tipo: Artigo de periódico |
Palavras-chave: Pre-germinated system; Flooded rice; Arroz Inundado; Arroz Irrigado; Metano; Efeito Estufa; Flood irrigation; Rice; Methane; Greenhouse gas emissions. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115570 |
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| LIMA, M. A. de; PAZIANOTTO, R. A. A.; VILLELA, O. V.; PARAIBA, L. C.. |
| Abstract: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55? S, 45°30? W), Brazil. Different CH4 emission... |
| Tipo: Artigo de periódico |
Palavras-chave: Flooded rice; Methane flux; Arroz irrigado por inundação; Fluxo de metano; Estágio de desenvolvimento da planta; Energia de ativação; Arroz Inundado; Metano; Temperatura do Solo; Rice; Greenhouse gas emissions; Methane; Developmental stages; Plant development; Activation energy. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1093715 |
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| FIORE, M. de F.. |
| O experimento foi conduzido com arroz irrigado (Oryza sativa L.), em campo, na Estação Experimental Palmital, do Centro Nacional de Pesquisa do Arroz e Feijão - CNPAF, em Goiânia, GO. Os tratamentos testados foram: testemunha, Azolla, 60 kg/ha de N, e 60 kg/ha de N + Azolla. Com a consorciação de Azolla, houve um aumento de, aproximadamente, 15% na produção em relação a testemunha. Os tratamentos de 60 kg/ha d e N e 60 kg/ha de N + Azolla apresentaram aumentos de produção de 46 e 56%, respectivamente, em comparação com a testemunha. Estes resultados preliminares mostram que existe possibilidade de uso de Azolla como fonte de nitrogênio para a cultura de arroz irrigado. |
| Tipo: Artigo de periódico |
Palavras-chave: Flooded rice; Arroz Irrigado; Oryza Sativa; Azolla; Nitrogênio; Rice. |
| Ano: 1984 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/214357 |
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| LIMA, M. A. de; BATISTA, G. das G.; SILVA, J. A. da; VILLELA, O. V.; VIEIRA, R. F.; GALVAO, J. A. H.. |
| Resumo: Flooded rice cultivation represents one of the main global anthropogenic sources of methane (CH4), a major greenhouse gas that strongly affects atmospheric photochemistry. CH4 production and emissions are influenced by several factors, such as climate, organic residues in water and soil, root exudates, water management, soil physicochemical and biological characteristics, and the cultivar. There are few studies in Brazil focused on the influence of cultivars on CH4 emissions. This experiment aimed to evaluate seasonal methane emissions using two varieties, IAC 105 and Epagri 106, in a pre-germinated cultivation system with a continuous water regime in the municipality of Pindamonhangaba, São Paulo. Methane emissions were quantified using the static... |
| Tipo: Artigo de periódico |
Palavras-chave: Flooded rice; Pre-germinated system; IAC 105; Epagri 106; Arroz Inundado; Metano; Efeito Estufa; Rice; Paddy soils; Greenhouse gas emissions; Cultivars; Methane. |
| Ano: 2025 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1185517 |
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| VIEIRA, S. P.; GALVAO, J. A. H.; VILLELA, O. V.; LUIZ, A. J. B.; LIMA, M. A. de. |
| Resumo: Mensurações locais são fundamentais a o aprimoramento de estimativas de emissão de gases de efeito estufa (GEE) no setor agropecuário, bem como à redução das incertezas em inventários nacionais. Neste sentido, estudos de avaliação da emissão diária de GEE constituem uma ferramenta importante às estimativas regionais por permitir a identificação de horários ou mesmo períodos mais representativos da ocorrência de emissões médias, otimizando os esforços de mensuração em campo. O objetivo deste estudo foi avaliar emissões diárias de GEE em sistema de produção de arroz irrigado na APTA/Polo Vale do Paraíba, em Pindamonhangaba, SP, com vistas à determinação de horários representativos de emissão média diária e sua correlação com variáveis ambientais.... |
| Tipo: Artigo em anais e proceedings |
Palavras-chave: Sistema de transplantio; Óxido nitroso; Fases de desenvolvimento da planta; Flooded rice; Transplanting system; Plant development stages; IAC-400; Arroz Irrigado; Transplante de Planta; Metano; Etapa de Desenvolvimento da Planta; Irrigated farming; Rice; Methane; Greenhouse gas emissions; Nitrous oxide; Transplanting (plants); Plant development. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1104993 |
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| Lima,Magda Aparecida de; Vieira,Rosana Faria; Frighetto,Rosa Toyoko Shiraishi; Luiz,Alfredo José Barreto; Villela,Omar Vieira. |
| ABSTRACT: Local greenhouse gas flow measurement studies have been encouraged at a global level as a subsidy for national and state inventories. This study aimed to evaluate the seasonal methane emission during the 2008/2009 harvest, from an irrigated rice plantation, under pre-germinated system, in the municipality of Tremembé, State of São Paulo, using the static chamber technique and gas chromatography. The study showed high seasonal emission of methane (CH4) for the studied area, probably due to the long flooding period. It was estimated the CH4 emission factor (6.51 kg CH4 ha-1 dia-1), the partial global warming potential (pGWP, 27.2 Mg CO2eq growing season-1 ha-1) and the yield-scaled pGWP (YpGWP, 3.9 kg CO2eq kg-1 grain). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flooded rice; Pre-germinated system; Methane. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001100201 |
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| Lima,Magda Aparecida de; Pazianotto,Ricardo Antonio Almeida; Villela,Omar Vieira; Paraíba,Lourival Costa. |
| ABSTRACT: This study aimed to investigate the diurnal variation of methane (CH4) emission in a flooded-irrigated rice field at different stages of the plant development under tropical climate in three growing seasons, in order to determine the most appropriate time for gas sampling in the Brazilian Southeast region. It aimed also to verify correlations between CH4 flux and air, water and soil temperatures, and solar radiation. The CH4 emissions were measured every 3-hour interval on specific days in different development stages of the flooded rice in the Experiment Station of the Agência Paulista de Tecnologia dos Agronegócios (APTA), Pólo Regional Vale do Paraíba, at Pindamonhangaba, State of São Paulo (22°55’ S, 45°30’ W), Brazil. Different CH4 emission... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flooded rice; Methane flux; Plant development stage; Activation energy. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000400251 |
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| Parfitt,José Maria Barbat; Timm,Luís Carlos; Reichardt,Klaus; Pinto,Luiz Fernando Spinelli; Pauletto,Eloy Antonio; Castilhos,Danilo Dufech. |
| The objective of this work was to evaluate the relationship between soil chemical and biological attributes and the magnitude of cuts and fills after the land leveling process of a lowland soil. Soil samples were collected from the 0 - 0.20 m layer, before and after leveling, on a 100 point grid established in the experimental area, to evaluate chemical attributes and soil microbial biomass carbon (MBC). Leveling operations altered the magnitude of soil chemical and biological attributes. Values of Ca, Mg, S, cation exchange capacity, Mn, P, Zn, and soil organic matter (SOM) decreased in the soil profile, whereas Al, K, and MBC increased after leveling. Land leveling decreased in 20% SOM average content in the 0 - 0.20 m layer. The great majority of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flooded rice; Soil biological attributes; Soil chemical attributes; Soil management; Soil movement. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013001100010 |
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| Zschornack,Tiago; Rosa,Carla Machado da; Reis,Cecília Estima Sacramento dos; Pedroso,Gabriel Munhoz; Camargo,Estefânia Silva; Santos,Daiane Carvalho dos; Boeni,Madalena; Bayer,Cimélio. |
| ABSTRACT Rice yield increases in response to improvements in crop management, but the impact on greenhouse gas (GHG) emissions in the subtropical region of Southern Brazil remains unknown. A three-year field study was developed aiming to evaluate the impact that an increase in crop management levels (high and very high) has on soil methane (CH4) and nitrous oxide (N2O) emissions, as compared to the level (medium) currently adopted by farmers in Southern Brazil. Differences in crop management included seed and fertilizer rates, irrigation, and pesticide use. The effect of crop management levels on the annual partial global warming potential (pGWP = CH4 × 25 + N2O × 298) ranged from 7,547 to 17,711 kg CO2eq ha−1 and this effect was larger than on the rice... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Entisols; Flooded rice; Greenhouse gases; Methane; Yield-scaled. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100516 |
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| Registros recuperados: 16 | |
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