Data/hora: 21/06/2024 15:52:10

Biblioteca(s): | Embrapa Agricultura Digital.
Data corrente: | 17/03/2014
Data da última atualização: | 20/05/2014
Autoria: | MARIN, F. R.; JONES, J. W.
Afiliação: | FABIO RICARDO MARIN, CNPTIA; JAMES W. JONES, University of Florida.
Título: | Process-based simple model for simulating sugarcane growth and production.
Ano de publicação: | 2014
Fonte/Imprenta: | Scientia agrícola, Piracicaba, v. 71, n. 1, p. 1-16, Jan./Feb. 2014.
Idioma: | Inglês
Conteúdo: | ABSTRACT: Dynamic simulation models can increase research efficiency and improve risk management of agriculture. Crop models are still little used for sugarcane (Saccharum spp.) because the lack of understanding of their capabilities and limitations, lack of experience in calibrating them, difficulties in evaluating and using models, and a general lack of model credibility. This pa- per describes the biophysics and shows a statistical evaluation of a simple sugarcane process-based model coupled with a routine for model calibration. Classical crop model approaches were used as a framework for this model, and fitted algorithms for simulating sucrose accumulation and leaf development driven by a source-sink approach were proposed. The model was evalu- ated using data from five growing seasons at four locations in Brazil, where crops received adequate nutrients and good weed control. Thirteen of the 27 parameters were optimized using a Generalized Likelihood Uncertainty Estimation algorithm using the leave-one-out cross-validation technique. Model predictions were evaluated using measured data of leaf area index, stalk and aerial dry mass, and sucrose content, using bias, root mean squared error, modeling efficiency, correlation coefficient and agreement index. The model well simulated the sugarcane crop in Southern Brazil, using the parameterization reported here. Predictions were best for stalk dry mass, followed by leaf area index and then sucrose content in stalk fresh mass.
Palavras-Chave: | Cana-de-açúcar; Modelos de simulação.
Thesaurus Nal: | Simulation models; Sugarcane.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/99365/1/Modelo-Stocropcane.pdf
Registro original: | Embrapa Agricultura Digital (CNPTIA)
Exemplares: | CNPTIA - (17896-1) - UPC - AP - DD -  -  -  - DIS