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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
12/08/1997 |
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Data da última atualização: |
12/08/1997 |
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Autoria: |
CEREDA, M. P. |
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Afiliação: |
Centro de Raizes Tropicais da UNESP. |
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Título: |
Valorizacao de residuos como forma de reduzir custos de producao |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Sao Pedro, SP: Centro de Raizes Tropicais/UNESP/SBM, 1996. |
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Páginas: |
p.25-44 |
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Idioma: |
Português |
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Notas: |
IIn: CONGRESSO LATINO AMERICANO DE RAIZES TROPICAIS, 1, E CONGRESSO BRSILEIRO DE MANDIOCA, 9, 1996, Sao Pedro, SP. Programa e Resumos.. |
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Conteúdo: |
A palavra residuos leva a uma imagem depreciativa, onde o produto, analisado no contexto global do processamento, nao tem serventia e deve ser descartado. Esse conceito tem sido gradualmente abandonado, substituido por outros como subproduto e mesmo co-produto. O conceito altera o contexto do processo e coloca em foco a possibilidade de melhor utilizacao da materia prima. Muitas mudancas no conceito de agroindustria ajudaram a acelerar essa nova imagem. A conciencia de protecao do meio ambiente, com a exigencia de que o processamento seja feito sem prejuizo da natureza, sem duvida foi um desses fatores. A imagem de umaindustria limpa e hoje uma peca mercadologica. Alem disso, fica cada vez mais caro tratar os efluentes e residuos, de forma que sempre que possivel e melhor evitar essa necessidade. A legislacao quencobra do contribuinte emmproporcao a carga organica dos dejetos que ele produz, veio para ficar. Alguns Estados brasileiros que ainda acreditam que vale a pena atrair "sujas", rapidamente se apercebem que fizeram mau negocio e que os impostos recolhidos acabam por ser gastos na mesma empresa, para consertar os estragos causados, o que nem sempre e possivel. Mesmo este fator comeca a ser substituido por outro, tao ou mais importante, devido a necessidade de aproveitar integralmente a materia prima e nao haver desperdicio no processo. |
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Categoria do assunto: |
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Marc: |
LEADER 01890naa a2200145 a 4500
001 1644945
005 1997-08-12
008 1996 bl uuuu u00u1 u #d
100 1 $aCEREDA, M. P.
245 $aValorizacao de residuos como forma de reduzir custos de producao
260 $c1996
300 $ap.25-44
500 $aIIn: CONGRESSO LATINO AMERICANO DE RAIZES TROPICAIS, 1, E CONGRESSO BRSILEIRO DE MANDIOCA, 9, 1996, Sao Pedro, SP. Programa e Resumos..
520 $aA palavra residuos leva a uma imagem depreciativa, onde o produto, analisado no contexto global do processamento, nao tem serventia e deve ser descartado. Esse conceito tem sido gradualmente abandonado, substituido por outros como subproduto e mesmo co-produto. O conceito altera o contexto do processo e coloca em foco a possibilidade de melhor utilizacao da materia prima. Muitas mudancas no conceito de agroindustria ajudaram a acelerar essa nova imagem. A conciencia de protecao do meio ambiente, com a exigencia de que o processamento seja feito sem prejuizo da natureza, sem duvida foi um desses fatores. A imagem de umaindustria limpa e hoje uma peca mercadologica. Alem disso, fica cada vez mais caro tratar os efluentes e residuos, de forma que sempre que possivel e melhor evitar essa necessidade. A legislacao quencobra do contribuinte emmproporcao a carga organica dos dejetos que ele produz, veio para ficar. Alguns Estados brasileiros que ainda acreditam que vale a pena atrair "sujas", rapidamente se apercebem que fizeram mau negocio e que os impostos recolhidos acabam por ser gastos na mesma empresa, para consertar os estragos causados, o que nem sempre e possivel. Mesmo este fator comeca a ser substituido por outro, tao ou mais importante, devido a necessidade de aproveitar integralmente a materia prima e nao haver desperdicio no processo.
773 $tSao Pedro, SP: Centro de Raizes Tropicais/UNESP/SBM, 1996.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
23/05/2023 |
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Data da última atualização: |
23/05/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
PINTO, V. M.; REIS, A. F. de B.; MELO, M. L. A. de; REICHARDT, K.; SANTOS, D.; VAN LIER, Q. de J. |
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Afiliação: |
VICTOR MERIGUETTI PINTO, CENA; ANDRE FROES DE BORJA REIS, LOUISIANA STATE UNIVERSITY; MARINA LUCIANA ABREU DE MELO, CENA; KLAUS REICHARDT, CENA; DEIVISON SANTOS, CNPASA; QUIRIJN DE JONG VAN LIER, CENA. |
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Título: |
Sustainable irrigation management in tropical lowland rice in Brazil. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Agricultural Water Management, v. 284, 108345, 2023. |
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ISSN: |
0378-3774 |
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Idioma: |
Inglês |
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Conteúdo: |
Drought events and water use conflicts drive the need for more efficient water management in rice-growing areas of the Brazilian Cerrado. Recent studies have shown the advantages of adopting water-saving irrigation in the region but a comprehensive assessment is needed. This study aims to model the performance of rice cultivation and water productivity in the tropical floodplains of the Cerrado biome of northern Brazil in response to irrigation management under contrasting seasonal rainfall levels. Twenty-seven scenarios of rice cultivation, resulting from the combination of three sites, three irrigation treatments, and three rainfall regimes, were simulated with the calibrated and validated hydrological model SWAP/WOFOST. The rainfall levels high (1501 mm), intermediate (952 mm), and low (510 mm) were relative to 120 days and obtained from weather stations located in the region. Two irrigation methods (flooding and water-saving irrigation) were compared against rainfed cultivation. Actual transpiration of the flooding and water-saving irrigation was 9 % and 4 % higher in the intermediate and high rainfall scenarios while it was 30 % and 20 % higher in the low rainfall scenario compared to the rainfed treatment. The largest deep percolation loss was 12700 mm per season for flood irrigation in the low rainfall scenario, whereas the lowest one was 349 mm for the rainfed treatment in the low rainfall scenario. Changing from flooding to water-saving irrigation increases water productivity by an average of 9 % and decreases relative grain yield by 5-12 %. Water productivity based on bottom flux increased on average by about five times (high rainfall scenario) to ten times (low rainfall scenario) when comparing flooding with water-saving irrigation. Results suggest that saving irrigation based on crop transpiration can reduce deep percolation losses and increase water productivity in the rice-growing areas of the Brazilian Cerrado. MenosDrought events and water use conflicts drive the need for more efficient water management in rice-growing areas of the Brazilian Cerrado. Recent studies have shown the advantages of adopting water-saving irrigation in the region but a comprehensive assessment is needed. This study aims to model the performance of rice cultivation and water productivity in the tropical floodplains of the Cerrado biome of northern Brazil in response to irrigation management under contrasting seasonal rainfall levels. Twenty-seven scenarios of rice cultivation, resulting from the combination of three sites, three irrigation treatments, and three rainfall regimes, were simulated with the calibrated and validated hydrological model SWAP/WOFOST. The rainfall levels high (1501 mm), intermediate (952 mm), and low (510 mm) were relative to 120 days and obtained from weather stations located in the region. Two irrigation methods (flooding and water-saving irrigation) were compared against rainfed cultivation. Actual transpiration of the flooding and water-saving irrigation was 9 % and 4 % higher in the intermediate and high rainfall scenarios while it was 30 % and 20 % higher in the low rainfall scenario compared to the rainfed treatment. The largest deep percolation loss was 12700 mm per season for flood irrigation in the low rainfall scenario, whereas the lowest one was 349 mm for the rainfed treatment in the low rainfall scenario. Changing from flooding to water-saving irrigation increases water pr... Mostrar Tudo |
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Palavras-Chave: |
SWAP model; Water productivity. |
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Thesagro: |
Arroz; Cerrado; Irrigação. |
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Thesaurus NAL: |
Irrigation; Rice. |
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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/1153943/1/awm-2023.pdf
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Marc: |
LEADER 02696naa a2200277 a 4500
001 2153943
005 2023-05-23
008 2023 bl uuuu u00u1 u #d
022 $a0378-3774
100 1 $aPINTO, V. M.
245 $aSustainable irrigation management in tropical lowland rice in Brazil.$h[electronic resource]
260 $c2023
520 $aDrought events and water use conflicts drive the need for more efficient water management in rice-growing areas of the Brazilian Cerrado. Recent studies have shown the advantages of adopting water-saving irrigation in the region but a comprehensive assessment is needed. This study aims to model the performance of rice cultivation and water productivity in the tropical floodplains of the Cerrado biome of northern Brazil in response to irrigation management under contrasting seasonal rainfall levels. Twenty-seven scenarios of rice cultivation, resulting from the combination of three sites, three irrigation treatments, and three rainfall regimes, were simulated with the calibrated and validated hydrological model SWAP/WOFOST. The rainfall levels high (1501 mm), intermediate (952 mm), and low (510 mm) were relative to 120 days and obtained from weather stations located in the region. Two irrigation methods (flooding and water-saving irrigation) were compared against rainfed cultivation. Actual transpiration of the flooding and water-saving irrigation was 9 % and 4 % higher in the intermediate and high rainfall scenarios while it was 30 % and 20 % higher in the low rainfall scenario compared to the rainfed treatment. The largest deep percolation loss was 12700 mm per season for flood irrigation in the low rainfall scenario, whereas the lowest one was 349 mm for the rainfed treatment in the low rainfall scenario. Changing from flooding to water-saving irrigation increases water productivity by an average of 9 % and decreases relative grain yield by 5-12 %. Water productivity based on bottom flux increased on average by about five times (high rainfall scenario) to ten times (low rainfall scenario) when comparing flooding with water-saving irrigation. Results suggest that saving irrigation based on crop transpiration can reduce deep percolation losses and increase water productivity in the rice-growing areas of the Brazilian Cerrado.
650 $aIrrigation
650 $aRice
650 $aArroz
650 $aCerrado
650 $aIrrigação
653 $aSWAP model
653 $aWater productivity
700 1 $aREIS, A. F. de B.
700 1 $aMELO, M. L. A. de
700 1 $aREICHARDT, K.
700 1 $aSANTOS, D.
700 1 $aVAN LIER, Q. de J.
773 $tAgricultural Water Management$gv. 284, 108345, 2023.
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Embrapa Pesca e Aquicultura (CNPASA) |
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