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 | Acesso ao texto completo restrito à biblioteca da Embrapa Clima Temperado. Para informações adicionais entre em contato com cpact.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
29/10/2021 |
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Data da última atualização: |
29/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AGOSTINETTO, D.; SOUZA, E. A.; ANDRES, A.; ULGUIM A. R.; SCHIMITZ, M. F.; GOULART, F. A. P. |
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Afiliação: |
DIRCEU AGOSTINETTO; EDNA A. SOUZA; ANDRE ANDRES, CPACT; ANDRÉ R. ULGUIM; MAICON F. SCHIMITZ; FRANCISCO A.P. GOULART. |
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Título: |
Period prior to interference of barnyardgrass is modified due to the spraying of cyhalofop-butyl alone or associated with penoxsulam in paddy rice crop. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Advances in Weed Science, V. 39, p. 1-6, 2021. |
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ISSN: |
2675-9462 |
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DOI: |
https://doi.org/10.51694/AdvWeedSci/2021;39:00001 |
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Idioma: |
Inglês |
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Conteúdo: |
Weed occurrence is one of the main obstacles to the expression of the production potential of crops. Competition for one or more limiting environmental resources (CO2, water, light, and nutrients) can generate irreversible losses to crops, and there may be no recovery of their development even after the removal of the stress caused by weeds or inclusion of limiting resources to the environment (Karimmojeni et al., 2014). The average losses in rice yield due to the coexistence with weeds are estimated between 40 and 60%, reaching up to 96% in cases of lack of control (Chauhan and Johnson, 2011). The degree of weed interference is determined according to the species, density, location, availability of resources, and emergence period relative to the crop (Datta et al., 2017). However, the losses caused to the crop can be altered as the period in which the weed community coexists with the crop changes. Crop and weeds can live together at the beginning of development for a certain period without causing quantitative or qualitative losses to the crop (Silva et al., 2014). This stage, called the period prior to interference (PPI), corresponds to the period after emergence or sowing in which the crop can coexist with the weed community without negatively affecting yield or other characteristics (Silva et al., 2014). However, control measures must be adopted at the end of this period so that crop yield is not compromised (Silva and Durigan, 2006). Studies of competition periods conducted with the rice crop have shown that PPI duration can vary from 7 to 26 DAE (Silva and Durigan, 2006; Zhang et al., 2003). Variations in topography, climate, crop genetics, and management practices affect weed composition, weed density, and emergence time relative to the crop and, consequently, affect PPI (Korres and Norsworthy, 2015). This variability needs to be understood for the better use of the integrated weed management of each environment. Among the weed species in rice fields, barnyardgrass (Echinochloa spp.) stands out relative to the others due to its highly competitive ability compared to the crop (Agostinetto et al., 2008). The importance of this weed is due to its morphophysiological similarities with rice plants, denoting the potential for yield losses because of competition, as well as high infestation levels and a wide distribution in commercial crops (Andres et al., 2007). MenosWeed occurrence is one of the main obstacles to the expression of the production potential of crops. Competition for one or more limiting environmental resources (CO2, water, light, and nutrients) can generate irreversible losses to crops, and there may be no recovery of their development even after the removal of the stress caused by weeds or inclusion of limiting resources to the environment (Karimmojeni et al., 2014). The average losses in rice yield due to the coexistence with weeds are estimated between 40 and 60%, reaching up to 96% in cases of lack of control (Chauhan and Johnson, 2011). The degree of weed interference is determined according to the species, density, location, availability of resources, and emergence period relative to the crop (Datta et al., 2017). However, the losses caused to the crop can be altered as the period in which the weed community coexists with the crop changes. Crop and weeds can live together at the beginning of development for a certain period without causing quantitative or qualitative losses to the crop (Silva et al., 2014). This stage, called the period prior to interference (PPI), corresponds to the period after emergence or sowing in which the crop can coexist with the weed community without negatively affecting yield or other characteristics (Silva et al., 2014). However, control measures must be adopted at the end of this period so that crop yield is not compromised (Silva and Durigan, 2006). Studies of competition periods condu... Mostrar Tudo |
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Palavras-Chave: |
Weed competition is one of the main constraints to rice yield. |
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Thesaurus Nal: |
Genetic background. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03213naa a2200229 a 4500
001 2135704
005 2021-10-29
008 2021 bl uuuu u00u1 u #d
022 $a2675-9462
024 7 $ahttps://doi.org/10.51694/AdvWeedSci/2021;39:00001$2DOI
100 1 $aAGOSTINETTO, D.
245 $aPeriod prior to interference of barnyardgrass is modified due to the spraying of cyhalofop-butyl alone or associated with penoxsulam in paddy rice crop.$h[electronic resource]
260 $c2021
520 $aWeed occurrence is one of the main obstacles to the expression of the production potential of crops. Competition for one or more limiting environmental resources (CO2, water, light, and nutrients) can generate irreversible losses to crops, and there may be no recovery of their development even after the removal of the stress caused by weeds or inclusion of limiting resources to the environment (Karimmojeni et al., 2014). The average losses in rice yield due to the coexistence with weeds are estimated between 40 and 60%, reaching up to 96% in cases of lack of control (Chauhan and Johnson, 2011). The degree of weed interference is determined according to the species, density, location, availability of resources, and emergence period relative to the crop (Datta et al., 2017). However, the losses caused to the crop can be altered as the period in which the weed community coexists with the crop changes. Crop and weeds can live together at the beginning of development for a certain period without causing quantitative or qualitative losses to the crop (Silva et al., 2014). This stage, called the period prior to interference (PPI), corresponds to the period after emergence or sowing in which the crop can coexist with the weed community without negatively affecting yield or other characteristics (Silva et al., 2014). However, control measures must be adopted at the end of this period so that crop yield is not compromised (Silva and Durigan, 2006). Studies of competition periods conducted with the rice crop have shown that PPI duration can vary from 7 to 26 DAE (Silva and Durigan, 2006; Zhang et al., 2003). Variations in topography, climate, crop genetics, and management practices affect weed composition, weed density, and emergence time relative to the crop and, consequently, affect PPI (Korres and Norsworthy, 2015). This variability needs to be understood for the better use of the integrated weed management of each environment. Among the weed species in rice fields, barnyardgrass (Echinochloa spp.) stands out relative to the others due to its highly competitive ability compared to the crop (Agostinetto et al., 2008). The importance of this weed is due to its morphophysiological similarities with rice plants, denoting the potential for yield losses because of competition, as well as high infestation levels and a wide distribution in commercial crops (Andres et al., 2007).
650 $aGenetic background
653 $aWeed competition is one of the main constraints to rice yield
700 1 $aSOUZA, E. A.
700 1 $aANDRES, A.
700 1 $aULGUIM A. R.
700 1 $aSCHIMITZ, M. F.
700 1 $aGOULART, F. A. P.
773 $tAdvances in Weed Science, V. 39, p. 1-6, 2021.
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Registro original: |
Embrapa Clima Temperado (CPACT) |
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Tipo/Formato |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
15/01/2019 |
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Data da última atualização: |
21/09/2023 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
PEIXOTO, M. S.; JONSSON, C. M.; PARAIBA, L. C.; BARROS, L. C.; LODWICK, W. A. |
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Afiliação: |
Magda S. Peixoto, UFSCar; CLAUDIO MARTIN JONSSON, CNPMA; LOURIVAL COSTA PARAIBA, CNPMA; Laécio C. Barros, UNICAMP; Weldon A. Lodwick, University of Colorado, Denver. |
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Título: |
Estimating the xenobiotics mixtures toxicity on aquatic organisms: the use of alpha-level of the fuzzy number. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: BARRETO, G. A.; COELHO, R. (Ed.). Fuzzy Information Processing. NAFIPS, 2018. Communications in Computer and Information Science, vol. 831. Springer, Cham. |
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Páginas: |
p. 489-499. |
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Idioma: |
Português |
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Conteúdo: |
Abstract: Agricultural practices that use various xenobiotics can contaminate surface water and groundwater with xenobiotics mixtures concentrations which cause serious risks to water quality and to the health of aquatic organisms that inhabit them. Xenobiotics in water when present as mixtures can exacerbate or reduce the toxic effects in aquatic organisms, when compared to the toxic effects of each individual component concentrations of the xenobiotics mixture. The objective of this study is to develop a mathematical method using ?-level of the fuzzy numbers with less accounts and simpler calculations to sort ecotoxicological effects in aquatic organisms of xenobiotics mixtures concentrations occurring in water, classifying them into antagonistic, additive or synergistic and also establishing the magnitude of the effects of concentrations of mixtures. The proposed method in this paper using fuzzy numbers can be suggested in protocols established by regulatory agencies to classify ecotoxicological effects of xenobiotics mixtures in water. |
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Palavras-Chave: |
Ecotoxicological; Fuzzy numbers. |
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Thesaurus NAL: |
mixtures. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190534/1/CL-JonssonCM-et-al-FuzzyInformation...Springer-2018-p489.pdf
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Marc: |
LEADER 01811naa a2200217 a 4500
001 2104113
005 2023-09-21
008 2018 bl uuuu u00u1 u #d
100 1 $aPEIXOTO, M. S.
245 $aEstimating the xenobiotics mixtures toxicity on aquatic organisms$bthe use of alpha-level of the fuzzy number.$h[electronic resource]
260 $c2018
300 $ap. 489-499.
520 $aAbstract: Agricultural practices that use various xenobiotics can contaminate surface water and groundwater with xenobiotics mixtures concentrations which cause serious risks to water quality and to the health of aquatic organisms that inhabit them. Xenobiotics in water when present as mixtures can exacerbate or reduce the toxic effects in aquatic organisms, when compared to the toxic effects of each individual component concentrations of the xenobiotics mixture. The objective of this study is to develop a mathematical method using ?-level of the fuzzy numbers with less accounts and simpler calculations to sort ecotoxicological effects in aquatic organisms of xenobiotics mixtures concentrations occurring in water, classifying them into antagonistic, additive or synergistic and also establishing the magnitude of the effects of concentrations of mixtures. The proposed method in this paper using fuzzy numbers can be suggested in protocols established by regulatory agencies to classify ecotoxicological effects of xenobiotics mixtures in water.
650 $amixtures
653 $aEcotoxicological
653 $aFuzzy numbers
700 1 $aJONSSON, C. M.
700 1 $aPARAIBA, L. C.
700 1 $aBARROS, L. C.
700 1 $aLODWICK, W. A.
773 $tIn: BARRETO, G. A.; COELHO, R. (Ed.). Fuzzy Information Processing. NAFIPS, 2018. Communications in Computer and Information Science, vol. 831. Springer, Cham.
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Embrapa Meio Ambiente (CNPMA) |
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