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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
11/11/2008 |
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Data da última atualização: |
20/12/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
MATOS, I. S. de P.; NAVES, R. P.; VILLAVERDE, R. R.; RIBAS, L. A. |
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Afiliação: |
Izabelle Smangoszevski de Paulo Matos, CNPq; Rafaela Pereira Naves, CNPq; Rafaella Rodrigues Villaverde, CNPq; LUCIANO ARRUDA RIBAS, CPAF-AC. |
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Título: |
Análise da diversidade da vegetação de uma floresta a ser manejada na Amazônia Ocidental. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA PIBIC/PIBITI/CNPq//UFAC/EMBRAPA, 17.; MOSTRA DE PESQUISA E PÓS-GRADUAÇÃO, 8., 2008, Rio Branco, AC. A iniciação científica em direção à formação de novos talentos na pesquisa: anais. Rio Branco, AC: Ufac, 2008. |
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Páginas: |
1 p. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
As florestas de terra firme na Amazônia são as que ocupam a maior parte das áreas florestadas e vêm sofrendo impacto com a exploração madeireira predatória. É crescente a necessidade de sistemas de exploração florestal que sejam sustentáveis ecológica e economicamente. O manejo florestal de impacto reduzido surge como alternativa, pois nesse sistema é possível diminuir consideravelmente os desperdícios e danos à floresta. Para o acompanhamento da resposta da floresta em regime de manejo é essencial o uso de parcelas permanentes, sendo estas instaladas antes da exploração e remedidas periodicamente. O objetivo do presente estudo foi apresentar a diversidade da vegetação de uma floresta de terra firme observada a partir da instalação de parcelas permanentes. |
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Palavras-Chave: |
Amazônia Ocidental; Diversidade da vegetação; Floresta de terra firme; Manejo florestal; Recursos florestais. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/132723/1/20123.pdf
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Marc: |
LEADER 01687nam a2200217 a 4500
001 1510540
005 2023-12-20
008 2008 bl uuuu u00u1 u #d
100 1 $aMATOS, I. S. de P.
245 $aAnálise da diversidade da vegetação de uma floresta a ser manejada na Amazônia Ocidental.$h[electronic resource]
260 $aIn: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA PIBIC/PIBITI/CNPq//UFAC/EMBRAPA, 17.; MOSTRA DE PESQUISA E PÓS-GRADUAÇÃO, 8., 2008, Rio Branco, AC. A iniciação científica em direção à formação de novos talentos na pesquisa: anais. Rio Branco, AC: Ufac$c2008
300 $a1 p.$c1 CD-ROM.
520 $aAs florestas de terra firme na Amazônia são as que ocupam a maior parte das áreas florestadas e vêm sofrendo impacto com a exploração madeireira predatória. É crescente a necessidade de sistemas de exploração florestal que sejam sustentáveis ecológica e economicamente. O manejo florestal de impacto reduzido surge como alternativa, pois nesse sistema é possível diminuir consideravelmente os desperdícios e danos à floresta. Para o acompanhamento da resposta da floresta em regime de manejo é essencial o uso de parcelas permanentes, sendo estas instaladas antes da exploração e remedidas periodicamente. O objetivo do presente estudo foi apresentar a diversidade da vegetação de uma floresta de terra firme observada a partir da instalação de parcelas permanentes.
653 $aAmazônia Ocidental
653 $aDiversidade da vegetação
653 $aFloresta de terra firme
653 $aManejo florestal
653 $aRecursos florestais
700 1 $aNAVES, R. P.
700 1 $aVILLAVERDE, R. R.
700 1 $aRIBAS, L. A.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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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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