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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
15/03/2022 |
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Data da última atualização: |
08/11/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BOSI, C.; HUTH, N. I.; SENTELHAS, P. C.; PEZZOPANE, J. R. M. |
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Afiliação: |
CRISTIAM BOSI, ESALQ; NEIL IAN HUTH, CSIRO; PAULO CESAR SENTELHAS, ESALQ; JOSE RICARDO MACEDO PEZZOPANE, CPPSE. |
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Título: |
APSIM model performance in simulating Piatã palisade grass growth and soil water in different positions of a silvopastoral system with eucalyptus. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Agricultural Systems, v.195, 2022, 103302. |
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Páginas: |
11 p. |
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DOI: |
https://doi.org/10.1016/j.agsy.2021.103302 |
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Idioma: |
Inglês |
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Conteúdo: |
CONTEXT: Silvopastoral systems aim to be more sustainable than conventional systems, increasing total pro-ductivity, diversifying agricultural production, and improving resource use efficiency. However, very few studies were performed to adapt crop models to simulate these systems. OBJECTIVE: This study investigates the current capacity of the APSIM Next Generation model to estimate Piata palisadegrass growth and soil water in different positions in a silvopastoral system with eucalyptus by looking at the impact of modelling belowground and aboveground competition separately. METHODS: A field experiment was conducted from December 2014 to January 2016 in a silvopastoral system with eucalyptus trees arranged in single rows, in East-West orientation, with 15 m between rows and 2 m between trees in the rows. This experiment was conducted under grazing management and rainfed conditions, during 11 growth cycles, with pasture variables, soil moisture and microclimatic conditions assessed at four distances from the eucalyptus north row (0.00 m, 3.75 m, 7.50 m and 11.25 m). APSIM testing was performed in two ways: focusing on belowground competition for soil water and nitrogen, using a multi-root-zone approach, and focusing on competition for solar radiation, using the measured data of solar radiation at each position. RESULTS AND CONCLUSIONS: The APSIM-Tropical Pasture model was effective in simulating pasture growth when only competition for solar radiation was considered (R2 from 0.75 to 0.86, Agreement index (d) from 0.88 to 0.96, and Nash-Sutcliffe efficiency (NSE) between 0.32 and 0.85). These simulations are promising taking into account the difficulties to simulate pasture growth in silvopastoral systems with grazing; however, in systems with strong belowground competition for soil water and nutrients, this approach has strong limitations. Simulations of pasture growth were not as effective when using the multi-root-zone approach (R2 between 0.57 and 0.87, d between 0.53 and 0.74, and NSE from -5.32 to -1.20), despite reasonable simulations of soil water for the positions between the tree rows (R2 between 0.70 and 0.80, d from 0.91 to 0.94, and NSE between 0.60 and 0.77). In view of these results, improvements should be performed in APSIM to better simulate silvopastoral systems, mainly for solar radiation transmission and tree roots growth and distribution. SIGNIFICANCE: This study allowed identifying the key drivers of competition within the studied environment and to inform where the main efforts should be targeted in building a more effective model for silvopastoral systems. This is important to help model development teams in organising and optimising their efforts. MenosCONTEXT: Silvopastoral systems aim to be more sustainable than conventional systems, increasing total pro-ductivity, diversifying agricultural production, and improving resource use efficiency. However, very few studies were performed to adapt crop models to simulate these systems. OBJECTIVE: This study investigates the current capacity of the APSIM Next Generation model to estimate Piata palisadegrass growth and soil water in different positions in a silvopastoral system with eucalyptus by looking at the impact of modelling belowground and aboveground competition separately. METHODS: A field experiment was conducted from December 2014 to January 2016 in a silvopastoral system with eucalyptus trees arranged in single rows, in East-West orientation, with 15 m between rows and 2 m between trees in the rows. This experiment was conducted under grazing management and rainfed conditions, during 11 growth cycles, with pasture variables, soil moisture and microclimatic conditions assessed at four distances from the eucalyptus north row (0.00 m, 3.75 m, 7.50 m and 11.25 m). APSIM testing was performed in two ways: focusing on belowground competition for soil water and nitrogen, using a multi-root-zone approach, and focusing on competition for solar radiation, using the measured data of solar radiation at each position. RESULTS AND CONCLUSIONS: The APSIM-Tropical Pasture model was effective in simulating pasture growth when only competition for solar radiation was considered (R2 from... Mostrar Tudo |
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Palavras-Chave: |
ILPF; Tree crop interactions; Tropical pasture model. |
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Thesagro: |
Brachiaria Brizantha. |
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Thesaurus Nal: |
Agroforestry; Grazing; Solar radiation. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
null
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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| Registros recuperados : 3 | |
| 1. |  | MIRANDA, C. H. B.; VOGEL, K.; MITCHELL, R.; SARATH, G. The potential for using the ARS switchgrass bioenergy NIRS calibration on C4 tropical grasses. In: INTERNATIONAL ANNUAL MEETINGS, ASA, CSSA, AND SSSA, Long Beach, CA, 2010. Green Revolution 2.0: Food + Energy and Environmental Security: abstracts. Long Beach, 2010. Madison: ASA: CSSA: SSSA, 2010. 1 p. Paper 61692.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 3. | | NASCIMENTO, J. B.; HENG-MOSS, T.; PROCHASKA, T. J.; DONZE, T.; SARATH, G.; BARRIGOSSI, J. A. F. Atividade de peroxidase de três populações de "Switchgrass" (Panicum virgatum L.) em resposta à injúria do pulgão-verdedos-cereais (Schizaphis graminum) (Hemiptera: Aphididae). In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 25., 2014, Goiânia. Entomologia integrada à sociedade para o desenvolvimento sustentável: anais. Goiânia: Sociedade Entomológica do Brasil, 2014.| Tipo: Resumo em Anais de Congresso |
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| Registros recuperados : 3 | |
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