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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
02/12/1998 |
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Data da última atualização: |
04/04/2019 |
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Autoria: |
PROBERT, M. E.; DIMES, J. P.; KEATING, B. A.; DALAL, R. C.; STRONG, W. M. |
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Afiliação: |
QDPI/CSIRO Agricultural Production Systems Research Unit; QDPI/CSIRO Agricultural Production Systems Research Unit; QDPI/CSIRO Agricultural Production Systems Research Unit; Queensland Wheat Research Institute; Queensland Wheat Research Institute. |
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Título: |
APSIM's water and nitrogen modules and simulation of the dynamics of water and nitrogen in fallow systems. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Agricultural Systems, v. 56, n. 1, p. 1-28, 1998. |
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DOI: |
https://doi.org/10.1016/S0308-521X(97)00028-0 |
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Idioma: |
Inglês |
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Conteúdo: |
APSIM (Agricultural Production Systems Simulator) is a software system which provides a flexible structure for the simulation of climatic and soil management effects on growth of crops in farming systems and changes in the soil resource. The focus of this paper is the predictive performance of APSIM for simulation of soil water and nitrate nitrogen in contrasting soils (vertisols and alfisols) and environments. The three APSIM modules that determine the dynamics of water, carbon, and nitrogen in the soil system (viz. SOILWAT, SOILN and RESIDUE v.1) are described in terms of the processes represented, with particular emphasis on aspects of their coding that differ from their precursors in CERES and PERFECT. The most fundamental change is in SOILN, which now provides a formal balance of both carbon and nitrogen in the soil and includes a labile soil organic matter pool that decomposes more rapidly than the bulk of the soil organic matter. Model performance, in terms of prediction of soil water and nitrate, is evaluated during fallows, thereby avoiding complications arising from water use and nitrogen uptake by a crop. One data set is from a long-term experiment on a vertisol in southeast Queensland which studied two tillage treatments (conventional and zero tillage) in combination with fertiliser nitrogen inputs for the growth of wheat; soil water and nitrate were measured twice each year (pre-planting and post-harvest). The second comes from experiments at Katherine, Northern Territory, where legume leys growing on alfisols were chemically killed and ensuing changes in soil water and nitrate were measured during a single season. For both datasets, the predictive ability of the model was satisfactory for water and nitrate, in terms of both the total amounts in the whole profile and their distribution with depth. Since neither of these datasets included measurements of the runoff component of the water balance, this aspect of model performance was evaluated, and shown to be generally good, using data from a third source where runoff had been measured from contour bay catchments. MenosAPSIM (Agricultural Production Systems Simulator) is a software system which provides a flexible structure for the simulation of climatic and soil management effects on growth of crops in farming systems and changes in the soil resource. The focus of this paper is the predictive performance of APSIM for simulation of soil water and nitrate nitrogen in contrasting soils (vertisols and alfisols) and environments. The three APSIM modules that determine the dynamics of water, carbon, and nitrogen in the soil system (viz. SOILWAT, SOILN and RESIDUE v.1) are described in terms of the processes represented, with particular emphasis on aspects of their coding that differ from their precursors in CERES and PERFECT. The most fundamental change is in SOILN, which now provides a formal balance of both carbon and nitrogen in the soil and includes a labile soil organic matter pool that decomposes more rapidly than the bulk of the soil organic matter. Model performance, in terms of prediction of soil water and nitrate, is evaluated during fallows, thereby avoiding complications arising from water use and nitrogen uptake by a crop. One data set is from a long-term experiment on a vertisol in southeast Queensland which studied two tillage treatments (conventional and zero tillage) in combination with fertiliser nitrogen inputs for the growth of wheat; soil water and nitrate were measured twice each year (pre-planting and post-harvest). The second comes from experiments at Katherine, Northern... Mostrar Tudo |
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Palavras-Chave: |
Agricultural production systems simulator; Dinâmica da água; Dinâmica do nitrogênio; Modelos de simulação; Simulation model; Software system. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02939naa a2200253 a 4500
001 1006790
005 2019-04-04
008 1998 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/S0308-521X(97)00028-0$2DOI
100 1 $aPROBERT, M. E.
245 $aAPSIM's water and nitrogen modules and simulation of the dynamics of water and nitrogen in fallow systems.$h[electronic resource]
260 $c1998
520 $aAPSIM (Agricultural Production Systems Simulator) is a software system which provides a flexible structure for the simulation of climatic and soil management effects on growth of crops in farming systems and changes in the soil resource. The focus of this paper is the predictive performance of APSIM for simulation of soil water and nitrate nitrogen in contrasting soils (vertisols and alfisols) and environments. The three APSIM modules that determine the dynamics of water, carbon, and nitrogen in the soil system (viz. SOILWAT, SOILN and RESIDUE v.1) are described in terms of the processes represented, with particular emphasis on aspects of their coding that differ from their precursors in CERES and PERFECT. The most fundamental change is in SOILN, which now provides a formal balance of both carbon and nitrogen in the soil and includes a labile soil organic matter pool that decomposes more rapidly than the bulk of the soil organic matter. Model performance, in terms of prediction of soil water and nitrate, is evaluated during fallows, thereby avoiding complications arising from water use and nitrogen uptake by a crop. One data set is from a long-term experiment on a vertisol in southeast Queensland which studied two tillage treatments (conventional and zero tillage) in combination with fertiliser nitrogen inputs for the growth of wheat; soil water and nitrate were measured twice each year (pre-planting and post-harvest). The second comes from experiments at Katherine, Northern Territory, where legume leys growing on alfisols were chemically killed and ensuing changes in soil water and nitrate were measured during a single season. For both datasets, the predictive ability of the model was satisfactory for water and nitrate, in terms of both the total amounts in the whole profile and their distribution with depth. Since neither of these datasets included measurements of the runoff component of the water balance, this aspect of model performance was evaluated, and shown to be generally good, using data from a third source where runoff had been measured from contour bay catchments.
653 $aAgricultural production systems simulator
653 $aDinâmica da água
653 $aDinâmica do nitrogênio
653 $aModelos de simulação
653 $aSimulation model
653 $aSoftware system
700 1 $aDIMES, J. P.
700 1 $aKEATING, B. A.
700 1 $aDALAL, R. C.
700 1 $aSTRONG, W. M.
773 $tAgricultural Systems$gv. 56, n. 1, p. 1-28, 1998.
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Embrapa Agricultura Digital (CNPTIA) |
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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
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
18/06/2012 |
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Data da última atualização: |
21/01/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
CAVALCANTE, A. C. R.; FERREIRA, A. M.; MELO, M. N.; FUX, B.; BRANDÃO, G. P.; VITOR, R. W. A. |
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Afiliação: |
ANTONIO CEZAR ROCHA CAVALCANTE, CNPC; A.M. Ferreira. |
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Título: |
Virulence and molecular characterization of Toxoplasma gondii isolated from goats in Ceará, Brazil. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Small Ruminant Research, v. 69, n. 1/3, p. 79-82, May, 2007. |
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DOI: |
10.1016/j.smallrumres.2005.12.023 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract - One hundred and sixty-nine fragments of heart muscle collected from goats in the State of Cear´ a, Brazil, were analyzed by mouse bioassay with the aim of isolating Toxoplasma gondii.Two T. gondii isolates, named G1 and G2, were obtained and were characterized by PCR-RFLP. In addition, their virulence was evaluated by experimental inoculation into BALB/c mice. The G1 isolate presented high virulence leading to 100% mortality of mice after inoculations with 101, 102, and 103 tachyzoites. The G2 isolate presented low virulence and none of the doses tested lead to mortality of mice. The PCR-RFLP analysis showed that the two isolates are recombinants of the types I/III. However, they differ in the haplotype combination for the genotypes analyzed. |
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Palavras-Chave: |
PCR-RFLP. |
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Thesagro: |
Caprino; Toxoplasma Gondii. |
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Thesaurus NAL: |
Brazil; Goats; Virulence. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 01535naa a2200265 a 4500
001 1926597
005 2025-01-21
008 2007 bl uuuu u00u1 u #d
024 7 $a10.1016/j.smallrumres.2005.12.023$2DOI
100 1 $aCAVALCANTE, A. C. R.
245 $aVirulence and molecular characterization of Toxoplasma gondii isolated from goats in Ceará, Brazil.$h[electronic resource]
260 $c2007
520 $aAbstract - One hundred and sixty-nine fragments of heart muscle collected from goats in the State of Cear´ a, Brazil, were analyzed by mouse bioassay with the aim of isolating Toxoplasma gondii.Two T. gondii isolates, named G1 and G2, were obtained and were characterized by PCR-RFLP. In addition, their virulence was evaluated by experimental inoculation into BALB/c mice. The G1 isolate presented high virulence leading to 100% mortality of mice after inoculations with 101, 102, and 103 tachyzoites. The G2 isolate presented low virulence and none of the doses tested lead to mortality of mice. The PCR-RFLP analysis showed that the two isolates are recombinants of the types I/III. However, they differ in the haplotype combination for the genotypes analyzed.
650 $aBrazil
650 $aGoats
650 $aVirulence
650 $aCaprino
650 $aToxoplasma Gondii
653 $aPCR-RFLP
700 1 $aFERREIRA, A. M.
700 1 $aMELO, M. N.
700 1 $aFUX, B.
700 1 $aBRANDÃO, G. P.
700 1 $aVITOR, R. W. A.
773 $tSmall Ruminant Research$gv. 69, n. 1/3, p. 79-82, May, 2007.
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Embrapa Caprinos e Ovinos (CNPC) |
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