| Texto completo | |
| Autor(es): Mostrar menos - |
Bender, Fabiani Denise
;
Cuadra, Santiago Vianna
;
Dias, Henrique Boriolo
;
Silva, Leandro Eduardo Annibal
;
de Oliveira, Monique Pires Gravina
;
Lamparelli, Rubens Augusto Camargo
;
Cabral, Osvaldo Machado Rodrigues
;
Nogueira, Sandra Furlan
;
Pezzopane, Jose Ricardo Macedo
;
Bosi, Cristiam
;
de Freitas, Helber Custodio
;
Magalha, Paulo Sergio Graziano
Número total de Autores: 12
|
| Tipo de documento: | Artigo Científico |
| Fonte: | EUROPEAN JOURNAL OF AGRONOMY; v. 159, p. 20-pg., 2024-06-24. |
| Resumo | |
Pastures represent the main land use type in Brazil and are used for livestock production and maintenance of land ownership. Most pasture areas exhibit signs of degradation related to inadequate management, which affects pasture biomass production. Terrestrial ecosystem models are effective tools for evaluating the economic and ecological returns associated with distinct management scenarios. In this paper, a new forage module implemented in the ECOSystem MOdel Simulator (ECOSMOS) is formulated, and ECOSMOS-Forage model calibration and evaluation results were obtained for estimating tropical forage growth under continuous and rotational stocking methods subject to grazing or cutting regimes. A set of equations to simulate the daily carbon allocation, growth, senescence, and morphological characteristics of Urochloa (syn. Brachiaria) brizantha cvs . Marandu and Piata were proposed. Biophysical and physiological parameters, including the solar radiation balance, soil water content, evapotranspiration and carbon assimilation, were calibrated and evaluated with one micrometeorological experiment. Additionally, two sets of parameters were calibrated for Marandu grass growth under continuous and rotational stocking. Based on the Marandu parameterization, a third set of parameters, thereby adjusting a few parameters, was derived for the Piata grass under rotational stocking. The ECOSMOS-Forage model could successfully capture the energy, carbon and water fluxes and biomass dynamics during growth cycles. The net radiation, evapotranspiration and gross primary production were simulated with agreement index ( d ) values of 0.97, 0.89, and 0.95, respectively, during the calibration phase and 0.98, 0.90, and 0.93, respectively, during the evaluation phase. Regarding model application to simulate forage growth under rotational stocking, the model could estimate aboveground, leaf and stem dry matter accumulation levels with d values ranging from 0.91 to 0.98. Although forage growth is relatively difficult to simulate, compared with annual crops, the results suggested that the model could provide high potential for simulating tropical perennial forage grasses. (AU) | |
| Processo FAPESP: | 17/50205-9 - Monitoramento de sistemas integrados lavoura-pecuária por meio de sensoriamento remoto e agricultura de precisão para uma produção mais sustentável - rumo à agricultura de baixo carbono |
| Beneficiário: | Paulo Sergio Graziano Magalhães |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/22095-0 - A sustentabilidade de uma pastagem reformada no Sudeste do Brasil com base nos balanços dos fluxos turbulentos (eddy covariance) dos gases do efeito estufa (CO2, CH4 e N2O) |
| Beneficiário: | Osvaldo Machado Rodrigues Cabral |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular |
| Processo FAPESP: | 20/06775-8 - Avaliação dos efeitos de sistemas de integração lavoura-pecuária e práticas de manejo associadas em processos de ciclagem de carbono no solo usando o modelo Agro-IBIS |
| Beneficiário: | Henrique Boriolo Dias |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 22/12718-2 - Avaliação dos efeitos de sistemas de integração lavoura-pecuária e práticas de manejo associadas em processos de ciclagem de carbono no solo usando o modelo Agro-IBIS |
| Beneficiário: | Fabiani Denise Bender |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |