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Registro Completo |
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
25/02/2021 |
Data da última atualização: |
14/05/2021 |
Autoria: |
XAVIER, A. I. S.; ARBAGE, A. P.; SILVA, M. R. da; RIBAS, G. G.; MEUS, L. D.; SANTOS, G. A. de A. dos; STRECK, N. A.; ZANON, A. J. |
Afiliação: |
ARTHUR INÁCIO SALDANHA XAVIEIR, Universidade Federal de Santa Maria; ALESSANDRO PORPORATTI ARBAGE, Universidade Federal de Santa Maria; MICHEL ROCHA da SILVA, Universidade Federal de Santa Maria; GIOVANA GHISLENI RIBAS, Universidade Federal de Santa Maria; LORENZO DALCIN MEUS, Universidade Federal de Santa Maria; GIONEI ALVES de ASSIS dos SANTOS, Instituto Rio Grandense do Arroz; NEREU AUGUSTO STRECK, Universidade Federal de Santa Maria; ALENCAR JUNIOR ZANON, Universidade Federal de Santa Maria. |
Título: |
Economic and productive analysis of irrigated rice crops using a multicase study. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, v. 56, e02037, 2021. |
DOI: |
https://doi.org/10.1590/S1678-3921. pab2021.v56.02037 |
Idioma: |
Inglês |
Notas: |
Título em português: Análise econômico-produtiva de lavouras de arroz irrigado por meio de um estudo multicasos. |
Conteúdo: |
ABSTRACT - The objective of this work was to evaluate the relationship between grain yield and production costs of flood-irrigated rice (Oryza sativa) in the state of Rio Grande do Sul, Brazil, in order to determine the yield range that maximizes the profit of farmers. There are estimations pointing out that the yield range that maximizes the profit for farmers is about 75 and 85% of the yield potential; however, this still needs to be validated for irrigated rice in Brazil. To validate these values, a technical and economic monitoring was carried out for eight farmers of irrigated rice, whose production costs were measured and compared with the mean yield and the percentage of potential yield achieved. To determine the potential yield of each crop, SimulArroz, a process-based model developed for the simulation of rice growth and yield in the South of Brazil, was used. The grain yield achieved by the farmers ranged from 6.3 to 11.0 Mg ha-¹ (48 to 83% of the potential yield), costs ranged from R$4,197.00 ha-¹ t o R $6,227.00 ha-¹, and profit ranged from R$-52.00 ha-¹ to R$3,599.00 ha-¹. Farmers who reach between 69 and 83% of yield potential achieve the highest profitability. The investment planning based on the yield potential calculated by the SimulArroz model can be efficiently adopted for irrigated rice crops. RESUMO - O objetivo deste trabalho foi avaliar a relação entre a produtividade de grãos e os custos de produção de lavouras de arroz (Oryza sativa) irrigado por inundação, no estado do Rio Grande do Sul, Brasil, para determinar a faixa de produtividade que maximiza o lucro do produtor. Existem estimativas de que a faixa de produtividade que maximiza o lucro para os agricultores é de cerca de 75 a 85% do potencial de produtividade; porém, isso ainda precisa ser validado para a cultura do arroz irrigado no Brasil. Para validar esses valores, foi realizado um acompanhamento técnico-econômico para oito produtores de arroz irrigado, cujos custos de produção foram determinados e comparados com a produtividade média e a percentagem da produtividade potencial atingida. Para determinar o potencial produtivo de cada lavoura, utilizou-se o SimulArroz, um modelo, baseado em processos, desenvolvido para a simulação do crescimento e da produtividade de arroz no Sul do Brasil. As produtividades atingidas pelos produtores variaram de 6,3 a 11,0 Mg ha-¹ (48 a 83% do potencial de produtividade), os custos variaram de R$ 4.197,00 ha-¹ a R$ 6.227,00 ha-¹, e o lucro variou de R$ -52,00 ha-¹ a R$ 3.599,00 ha-¹. Produtores que atingem entre 69 e 83% do potencial produtivo alcançam maior lucratividade. O planejamento de investimento com base no potencial produtivo, calculado pelo modelo SimulArroz, pode ser adotado eficazmente nas lavouras de arroz irrigado. MenosABSTRACT - The objective of this work was to evaluate the relationship between grain yield and production costs of flood-irrigated rice (Oryza sativa) in the state of Rio Grande do Sul, Brazil, in order to determine the yield range that maximizes the profit of farmers. There are estimations pointing out that the yield range that maximizes the profit for farmers is about 75 and 85% of the yield potential; however, this still needs to be validated for irrigated rice in Brazil. To validate these values, a technical and economic monitoring was carried out for eight farmers of irrigated rice, whose production costs were measured and compared with the mean yield and the percentage of potential yield achieved. To determine the potential yield of each crop, SimulArroz, a process-based model developed for the simulation of rice growth and yield in the South of Brazil, was used. The grain yield achieved by the farmers ranged from 6.3 to 11.0 Mg ha-¹ (48 to 83% of the potential yield), costs ranged from R$4,197.00 ha-¹ t o R $6,227.00 ha-¹, and profit ranged from R$-52.00 ha-¹ to R$3,599.00 ha-¹. Farmers who reach between 69 and 83% of yield potential achieve the highest profitability. The investment planning based on the yield potential calculated by the SimulArroz model can be efficiently adopted for irrigated rice crops. RESUMO - O objetivo deste trabalho foi avaliar a relação entre a produtividade de grãos e os custos de produção de lavouras de arroz (Oryza sativa) irrigado por inu... Mostrar Tudo |
Thesagro: |
Arroz Irrigado; Custo de Produção; Lucro; Oryza Sativa. |
Thesaurus Nal: |
Farmers; Production costs; Profitability; Rice. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/221471/1/Economic-productive-analysis-2021.pdf
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Marc: |
LEADER 03858naa a2200325 a 4500 001 2130280 005 2021-05-14 008 2021 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1590/S1678-3921. pab2021.v56.02037$2DOI 100 1 $aXAVIER, A. I. S. 245 $aEconomic and productive analysis of irrigated rice crops using a multicase study.$h[electronic resource] 260 $c2021 500 $aTítulo em português: Análise econômico-produtiva de lavouras de arroz irrigado por meio de um estudo multicasos. 520 $aABSTRACT - The objective of this work was to evaluate the relationship between grain yield and production costs of flood-irrigated rice (Oryza sativa) in the state of Rio Grande do Sul, Brazil, in order to determine the yield range that maximizes the profit of farmers. There are estimations pointing out that the yield range that maximizes the profit for farmers is about 75 and 85% of the yield potential; however, this still needs to be validated for irrigated rice in Brazil. To validate these values, a technical and economic monitoring was carried out for eight farmers of irrigated rice, whose production costs were measured and compared with the mean yield and the percentage of potential yield achieved. To determine the potential yield of each crop, SimulArroz, a process-based model developed for the simulation of rice growth and yield in the South of Brazil, was used. The grain yield achieved by the farmers ranged from 6.3 to 11.0 Mg ha-¹ (48 to 83% of the potential yield), costs ranged from R$4,197.00 ha-¹ t o R $6,227.00 ha-¹, and profit ranged from R$-52.00 ha-¹ to R$3,599.00 ha-¹. Farmers who reach between 69 and 83% of yield potential achieve the highest profitability. The investment planning based on the yield potential calculated by the SimulArroz model can be efficiently adopted for irrigated rice crops. RESUMO - O objetivo deste trabalho foi avaliar a relação entre a produtividade de grãos e os custos de produção de lavouras de arroz (Oryza sativa) irrigado por inundação, no estado do Rio Grande do Sul, Brasil, para determinar a faixa de produtividade que maximiza o lucro do produtor. Existem estimativas de que a faixa de produtividade que maximiza o lucro para os agricultores é de cerca de 75 a 85% do potencial de produtividade; porém, isso ainda precisa ser validado para a cultura do arroz irrigado no Brasil. Para validar esses valores, foi realizado um acompanhamento técnico-econômico para oito produtores de arroz irrigado, cujos custos de produção foram determinados e comparados com a produtividade média e a percentagem da produtividade potencial atingida. Para determinar o potencial produtivo de cada lavoura, utilizou-se o SimulArroz, um modelo, baseado em processos, desenvolvido para a simulação do crescimento e da produtividade de arroz no Sul do Brasil. As produtividades atingidas pelos produtores variaram de 6,3 a 11,0 Mg ha-¹ (48 a 83% do potencial de produtividade), os custos variaram de R$ 4.197,00 ha-¹ a R$ 6.227,00 ha-¹, e o lucro variou de R$ -52,00 ha-¹ a R$ 3.599,00 ha-¹. Produtores que atingem entre 69 e 83% do potencial produtivo alcançam maior lucratividade. O planejamento de investimento com base no potencial produtivo, calculado pelo modelo SimulArroz, pode ser adotado eficazmente nas lavouras de arroz irrigado. 650 $aFarmers 650 $aProduction costs 650 $aProfitability 650 $aRice 650 $aArroz Irrigado 650 $aCusto de Produção 650 $aLucro 650 $aOryza Sativa 700 1 $aARBAGE, A. P. 700 1 $aSILVA, M. R. da 700 1 $aRIBAS, G. G. 700 1 $aMEUS, L. D. 700 1 $aSANTOS, G. A. de A. dos 700 1 $aSTRECK, N. A. 700 1 $aZANON, A. J. 773 $tPesquisa Agropecuária Brasileira$gv. 56, e02037, 2021.
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Embrapa Unidades Centrais (AI-SEDE) |
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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
23/11/2022 |
Data da última atualização: |
22/01/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
SILVA, F. B. F.; SILVA, G. T. S. T. da; TORRES, J. A.; OLIVEIRA, C. R. de. |
Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA. |
Título: |
Tuning the photocatalytic activity of tin oxide through mechanical surface activation. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Journal of the Brazilian Chemical Society, v. 33, n. 7, 2022. |
Páginas: |
725-733 |
DOI: |
https://dx.doi.org/10.21577/0103-5053.20220009 |
Idioma: |
Inglês |
Conteúdo: |
Tin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potential of the energy level and the formation of the hydroxyl group on the SnO2 surface. Moreover, these changes are intensified over the milling up to 90 min, directly affecting the photocatalytic performance, which was monitored by the rate of rhodamine B (RhB) degradation driven by ultraviolet (UV) irradiation. As a result, all ground samples showed better photocatalytic activity than pristine SnO2 (Sn-cop). The maximum degradation of rhodamine B was ca. 75%, achieved with 90 min-milled SnO2 nanoparticles (Sn-M90), compared to the Sn-cop sample induced a 1.67 times higher degradation rate. The reaction mechanism suggests that its better photocatalytic activity may be associated with the higher increased redox potential of the valence and conduction bands and the formation of hydroxyl active sites on the catalyst surface principal oxidizing agent generated. Therefore, we conclude that the ball milling process is an efficient way to induce stable activation of oxide metal for photocatalytic applications. |
Palavras-Chave: |
Bandgap dependence; Hydroxyl groups; Mechanical activation; SnO2 nanoparticles. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148648/1/P-Tuning-the-Photocatalytic-Activity-of-Tin-Oxide-through-Mechanical-Surface.pdf
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Marc: |
LEADER 02105naa a2200229 a 4500 001 2148648 005 2024-01-22 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://dx.doi.org/10.21577/0103-5053.20220009$2DOI 100 1 $aSILVA, F. B. F. 245 $aTuning the photocatalytic activity of tin oxide through mechanical surface activation.$h[electronic resource] 260 $c2022 300 $a725-733 520 $aTin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potential of the energy level and the formation of the hydroxyl group on the SnO2 surface. Moreover, these changes are intensified over the milling up to 90 min, directly affecting the photocatalytic performance, which was monitored by the rate of rhodamine B (RhB) degradation driven by ultraviolet (UV) irradiation. As a result, all ground samples showed better photocatalytic activity than pristine SnO2 (Sn-cop). The maximum degradation of rhodamine B was ca. 75%, achieved with 90 min-milled SnO2 nanoparticles (Sn-M90), compared to the Sn-cop sample induced a 1.67 times higher degradation rate. The reaction mechanism suggests that its better photocatalytic activity may be associated with the higher increased redox potential of the valence and conduction bands and the formation of hydroxyl active sites on the catalyst surface principal oxidizing agent generated. Therefore, we conclude that the ball milling process is an efficient way to induce stable activation of oxide metal for photocatalytic applications. 653 $aBandgap dependence 653 $aHydroxyl groups 653 $aMechanical activation 653 $aSnO2 nanoparticles 700 1 $aSILVA, G. T. S. T. da 700 1 $aTORRES, J. A. 700 1 $aOLIVEIRA, C. R. de 773 $tJournal of the Brazilian Chemical Society$gv. 33, n. 7, 2022.
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