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| 1. |  | DART, R. de O.; BERBARA, R. L. L.; MENDONÇA-SANTOS, M. de L.; BORNES FILHO, M. C. Q.; TATO, G. K. Propriedades dos solos em três sucessões de floresta tropical seca. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 17., 2008, Rio de Janeiro. Manejo e conservação do solo e da água no contexto das mudanças ambientais. Rio de Janeiro: Embrapa Solos, 2008. 1 CD-ROM. (Embrapa Solos. Documentos, 101).| Biblioteca(s): Embrapa Solos. |
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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. |
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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Circulação/Nível: |
A - 1 |
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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: |
LEADER 03554naa a2200265 a 4500
001 2140923
005 2023-11-08
008 2022 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.agsy.2021.103302$2DOI
100 1 $aBOSI, C.
245 $aAPSIM model performance in simulating Piatã palisade grass growth and soil water in different positions of a silvopastoral system with eucalyptus.$h[electronic resource]
260 $c2022
300 $a11 p.
520 $aCONTEXT: 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.
650 $aAgroforestry
650 $aGrazing
650 $aSolar radiation
650 $aBrachiaria Brizantha
653 $aILPF
653 $aTree crop interactions
653 $aTropical pasture model
700 1 $aHUTH, N. I.
700 1 $aSENTELHAS, P. C.
700 1 $aPEZZOPANE, J. R. M.
773 $tAgricultural Systems$gv.195, 2022, 103302.
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