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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
17/07/2019 |
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Data da última atualização: |
06/11/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MARIN, F. R.; ANGELOCCI, L. R.; NASSIF, D. S. P.; VIANA, M. S.; PILAU, F. G.; SILVA, E. H. F. M. da; SOBENKO, L. R.; GONÇALVES, A. O.; PEREIRA, R. A. A.; CARVALHO, K. S. |
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Afiliação: |
FÁBIO R. MARIN, ESALQ/USP; LUIZ R. ANGELOCCI, ESALQ/USP; DANIEL S. P. NASSIF, UFSCAR; MURILO S. VIANA, ESALQ/USP; FELIPE G. PILAU, ESALQ/USP; EVANDRO H. F. M. DA SILVA, ESALQ/USP; LUIZ R. SOBENKO, ESALQ/USP; ALEXANDRE ORTEGA GONCALVES, CNPS; RODOLFO A. A. PEREIRA, ESALQ/USP; KASSIO S. CARVALHO, IFMG. |
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Título: |
Revisiting the crop coefficient-reference evapotranspiration procedure for improving irrigation management. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Theoretical and Applied Climatology, v. 138, n. 3/4, p. 1785-1793, Nov. 2019. |
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DOI: |
10.1007/s00704-019-02940-7 |
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Idioma: |
Inglês |
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Conteúdo: |
The consumptive use of water by irrigated crops is typically quantified using the crop coefficient–reference evapotranspiration (Kc–ETo) procedure; yet, recent results showed that Kc might change with ETo, in response to high atmospheric demand. It is not known if the reduced Kc at high ETo applies to other crops with different aerodynamic features of the canopies. This paper seeks to provide the Kc values for soybean, wheat and potato, and propose an adaptation to the Kc–ETo procedure, hypothesising that the inverse relation between Kc and ETo would be general for all types of crops. Our results showed average Kc values of 0.90, 1.18 and 1.28, respectively, for soybean, wheat and potato cropping systems in the Brazilian cropping systems. However, Kc decreased as ETo increased, for all crops considered in this study, because of the increase of internal plant resistances to vapour diffusion from the leaves to the atmosphere. When ETo was above > 4 mm d-1, the water use by such crops was lower than that prescribed by Allen et al. (JAMA, 1998). The time-based Kc curves in Allen et al. (JAMA, 1998) are inappropriate for the studied crops under high demanding conditions and, besides the considerations suggested by Allen et al. (JAMA, 1998) (i.e., crop development stage, presence or absence of weeds), Kc recommendations for practical irrigation management should be based on the average ETo values of the previous days of the irrigation procedure. |
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Thesagro: |
Evapotranspiração; Irrigação; Manejo. |
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Thesaurus Nal: |
Evapotranspiration; Irrigation management. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02402naa a2200301 a 4500
001 2110661
005 2019-11-06
008 2019 bl uuuu u00u1 u #d
024 7 $a10.1007/s00704-019-02940-7$2DOI
100 1 $aMARIN, F. R.
245 $aRevisiting the crop coefficient-reference evapotranspiration procedure for improving irrigation management.$h[electronic resource]
260 $c2019
520 $aThe consumptive use of water by irrigated crops is typically quantified using the crop coefficient–reference evapotranspiration (Kc–ETo) procedure; yet, recent results showed that Kc might change with ETo, in response to high atmospheric demand. It is not known if the reduced Kc at high ETo applies to other crops with different aerodynamic features of the canopies. This paper seeks to provide the Kc values for soybean, wheat and potato, and propose an adaptation to the Kc–ETo procedure, hypothesising that the inverse relation between Kc and ETo would be general for all types of crops. Our results showed average Kc values of 0.90, 1.18 and 1.28, respectively, for soybean, wheat and potato cropping systems in the Brazilian cropping systems. However, Kc decreased as ETo increased, for all crops considered in this study, because of the increase of internal plant resistances to vapour diffusion from the leaves to the atmosphere. When ETo was above > 4 mm d-1, the water use by such crops was lower than that prescribed by Allen et al. (JAMA, 1998). The time-based Kc curves in Allen et al. (JAMA, 1998) are inappropriate for the studied crops under high demanding conditions and, besides the considerations suggested by Allen et al. (JAMA, 1998) (i.e., crop development stage, presence or absence of weeds), Kc recommendations for practical irrigation management should be based on the average ETo values of the previous days of the irrigation procedure.
650 $aEvapotranspiration
650 $aIrrigation management
650 $aEvapotranspiração
650 $aIrrigação
650 $aManejo
700 1 $aANGELOCCI, L. R.
700 1 $aNASSIF, D. S. P.
700 1 $aVIANA, M. S.
700 1 $aPILAU, F. G.
700 1 $aSILVA, E. H. F. M. da
700 1 $aSOBENKO, L. R.
700 1 $aGONÇALVES, A. O.
700 1 $aPEREIRA, R. A. A.
700 1 $aCARVALHO, K. S.
773 $tTheoretical and Applied Climatology$gv. 138, n. 3/4, p. 1785-1793, Nov. 2019.
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Embrapa Solos (CNPS) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
14/11/2012 |
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Data da última atualização: |
17/06/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
ROGERIO, M. C. P.; CASTRO, E. M. de; MARTINS, E. C.; MONTEIRO, J. P.; SILVA, K. de M.; CÂNDIDO, M. J. D.; GOMES, T. C. L.; BLOC, A. F. R.; VASCONCELOS, A. M. de; LEITE, E. R.; COSTA, H. H. A. |
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Afiliação: |
MARCOS CLAUDIO PINHEIRO ROGERIO, CNPC; Eliane Minervina de Castro, State University Vale do Acaraú - (UVA) - Sobral, CE.; ESPEDITO CEZARIO MARTINS, CNPC; JOMAR PATRICIO MONTEIRO, CNPC; KLEIBE DE MORAES SILVA, CNPC; Magno José Duarte Cândido, Federal University of Ceará (UFC) - Fortaleza, CE; Tereza Cristina Lacerda Gomes, UVA - Sobral, CE.; Antoine Francis Roux Bloc, Arruda & Bloc Limited Company - Sobral, CE.; Ângela Maria de Vasconcelos, UVA - Sobral, CE.; Eneas Reis Leite, UVA - Sobral, CE.; Hélio Henrique Araújo Costa, UVA - Sobral, CE. |
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Título: |
Economical and financial analysis of lamb finishing fed with diets formulated according to the NRC (1985) and the NRC (2007). |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Tropical Animal Health and Production, Edinburgh, v. 45, n. 1, p. 259-266, Dec. 2012. |
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DOI: |
10.1007/s11250-012-0210-5 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: This study compares both versions of the nutritional requirement system determined by the National Research Council (NRC) version 1985 (NRC85) and NRC version 2007 (NRC07), for finishing lambs in feedlots. Nineteen crossbred lambs were divided in four groups representing four experimental treatments: one diet according to NRC85 and three diets according to NRC07. The diets recommended by NRC07 considers crude protein intake relative to ruminal undegradable protein at 20, 40, and 60 % levels (NRC07/20, NRC07/40, and NRC07/60). Diets were composed of Brazilian semi-arid native grass silage, soybean meal, corn, annatto byproduct, and limestone. Purchases and sales of lambs were done according to average market prices in Brazil. The economic indicators considered pointed that all treatments were viable but NRC07/20 and NRC07/60 were more profitable with similar net present values (NPVs) and internal return rates (IRRs). NRC07/20 was the best option showing an IRR of 17.20 % and a payback period (PP) of 5.07 considering a fixed annual interest rate of 6 %. Sensitivity analysis considering a 10 % raise in variable costs showed negative NPVs, IRRs inferior to the opportunity cost rates adopted and PPs that exceeded the planning horizon of 7 years for both NRC85 and NRC07/40. |
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Palavras-Chave: |
Brasil; Prolificidade; Raça Santa Inês; Viabilidade econômica. |
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Thesagro: |
Confinamento; Ganho de peso; Ingestão; Ovino; Terminação. |
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Thesaurus NAL: |
Brazil; Feed intake; Lambs; Profitability; Semiarid zones; Sheep; Weight gain. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02577naa a2200445 a 4500
001 1939771
005 2015-06-17
008 2012 bl uuuu u00u1 u #d
024 7 $a10.1007/s11250-012-0210-5$2DOI
100 1 $aROGERIO, M. C. P.
245 $aEconomical and financial analysis of lamb finishing fed with diets formulated according to the NRC (1985) and the NRC (2007).$h[electronic resource]
260 $c2012
520 $aAbstract: This study compares both versions of the nutritional requirement system determined by the National Research Council (NRC) version 1985 (NRC85) and NRC version 2007 (NRC07), for finishing lambs in feedlots. Nineteen crossbred lambs were divided in four groups representing four experimental treatments: one diet according to NRC85 and three diets according to NRC07. The diets recommended by NRC07 considers crude protein intake relative to ruminal undegradable protein at 20, 40, and 60 % levels (NRC07/20, NRC07/40, and NRC07/60). Diets were composed of Brazilian semi-arid native grass silage, soybean meal, corn, annatto byproduct, and limestone. Purchases and sales of lambs were done according to average market prices in Brazil. The economic indicators considered pointed that all treatments were viable but NRC07/20 and NRC07/60 were more profitable with similar net present values (NPVs) and internal return rates (IRRs). NRC07/20 was the best option showing an IRR of 17.20 % and a payback period (PP) of 5.07 considering a fixed annual interest rate of 6 %. Sensitivity analysis considering a 10 % raise in variable costs showed negative NPVs, IRRs inferior to the opportunity cost rates adopted and PPs that exceeded the planning horizon of 7 years for both NRC85 and NRC07/40.
650 $aBrazil
650 $aFeed intake
650 $aLambs
650 $aProfitability
650 $aSemiarid zones
650 $aSheep
650 $aWeight gain
650 $aConfinamento
650 $aGanho de peso
650 $aIngestão
650 $aOvino
650 $aTerminação
653 $aBrasil
653 $aProlificidade
653 $aRaça Santa Inês
653 $aViabilidade econômica
700 1 $aCASTRO, E. M. de
700 1 $aMARTINS, E. C.
700 1 $aMONTEIRO, J. P.
700 1 $aSILVA, K. de M.
700 1 $aCÂNDIDO, M. J. D.
700 1 $aGOMES, T. C. L.
700 1 $aBLOC, A. F. R.
700 1 $aVASCONCELOS, A. M. de
700 1 $aLEITE, E. R.
700 1 $aCOSTA, H. H. A.
773 $tTropical Animal Health and Production, Edinburgh$gv. 45, n. 1, p. 259-266, Dec. 2012.
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