Título:	Application of the AgS (Agricultural Crop Simulator) model to simulate the biomass production of arandu palisadegrass managed under rotational stocking with cattle.
Autoria:	BUENO, F. O. CUADRA, S. V. OLIVEIRA, M. P. G. de BENDER, F. D. PEZZOPANE, J. R. M. SANTOS, P. M. NOGUEIRA, S. F. GERDES, L. GIMENES, F. M. de A.
Afiliação:	FERNANDO OLIVEIRA BUENO, INSTITUTO DE ZOOTECNIA; SANTIAGO VIANNA CUADRA, CNPTIA; MONIQUE PIRES GRAVINA DE OLIVEIRA; FABIANI DENISE BENDER; JOSE RICARDO MACEDO PEZZOPANE, CPPSE; PATRICIA MENEZES SANTOS, CPPSE; SANDRA FURLAN NOGUEIRA, CNPMA; LUCIANA GERDES, INSTITUTO DE ZOOTECNIA; FLAVIA MARIA DE ANDRADE GIMENES, INSTITUTO DE ZOOTECNIA.
Ano de publicação:	2025
Referência:	Grasses, v. 4, n. 4, 50, Dec. 2025.
Conteúdo:	The use of plant growth simulation models, such as the Agricultural Crop Simulator (AgS), can support planning and management decisions in pasture-based animal production systems. AgS is a biophysical model that is being developed to focus on crops relevant to the Brazilian economy. Originally, the model was parameterized for Marandu palisadegrass (Urochloa brizantha cv. Marandu) under continuous stocking method and cutting regimes. The objective of this study was to parametrize and evaluate the performance of AgS in simulating Marandu palisadegrass biomass production under rotational stocking methods. Field data from an experiment assessing pre-grazing heights of Marandu palisadegrass grazed by beef cattle was used to evaluate the model. The simulations initially underestimated leaf and total biomass production, regardless of pre-grazing height. These results suggested that differences between cutting and grazing methods make additional model calibration necessary. Differences related to regrowth of leaves were addressed and the new calibration resulted in higher biomass allocation to leaves and stems, reducing the mean error in the 25 cm treatment from −1.001 to −253 kg ha−1 and the rRMSE from 41% to 34%. AgS showed potential for simulating rotational stocking after adjustments were made, and future calibrations should consider different management and environmental conditions.
Thesagro:	Altura Simulação Modelo de Simulação
NAL Thesaurus:	Urochloa brizantha Forage production Height Crop models Simulation models
Palavras-chave:	Alocação de fotoassimilados Produção de forragem Pré-pastoreio Modelo de simulação de crescimento de planta Capim-marandu Marandu palisadegrass Allocation of photoassimilates Pre-grazing
Digital Object Identifier:	https://doi.org/10.3390/grasses4040050
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPTIA)