New APSIM-Sugar features and parameters required to account for high sugarcane yields in tropical environments

Autor(es)

Dias, Henrique Boriolo ^[1] ; Inman-Bamber, Geoff ^[2] ; Bermejo, Rodrigo ^[3] ; Sentelhas, Paulo Cesar ^[1] ; Christodoulou, Diomedes ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, BR-13418900 Piracicaba, SP - Brazil

^[2] James Cook Univ, Coll Sci Technol & Engn, Townsville, Qld 4811 - Australia

^[3] Alvean, BR-01311000 Sao Paulo, SP - Brazil

^[4] Gordian Energy & Terracal Alimentos & Bioenergia, BR-22640100 Barra Da Tijuca, RJ - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FIELD CROPS RESEARCH; v. 235, p. 38-53, APR 1 2019.
• Citações Web of Science: 2

Resumo

Sugarcane in field plot experiments in tropical Brazil (Guadalupe, Piaui State, 6.6 degrees S), produced very high yields under non-limiting water and nutrients. Mean stalk dry mass at 8, 11.5 and 15 months were 40, 51 and 70 t/ha respectively for six varieties and six planting dates. These yields were explained by high but not excessive temperatures allowing the canopy to close after 73 days on average. Substantial changes were required to enable the APSIM-Sugar model to simulate canopy and yield gain processes in Brazilian genotypes for the purpose of optimising variety, planting and harvest date options. A new modelling feature was proposed to deal with the observed growth slowdown when crop was about 7-8 months old and dry mass yields higher than 40 t/ha. All new parameters and features were validated with independent experiments as well as with the original dataset used for developing APSIM-Sugar. Future studies involving irrigation, yield gap analysis and climate change in environments where high yields are expected, should consider these modifications. (AU)

• Processo FAPESP: 17/24424-5 - Desenvolvimento de parâmetros do modelo APSIM-Sugar para variedades brasileiras de cana-de-açúcar e seu uso para otimizar a interação genótipo x ambiente x manejo visando produtividade e qualidade
• Beneficiário: Henrique Boriolo Dias
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 16/11170-2 - Abordagem multimodelos para previsão da produtividade da cana-de-açúcar e avaliação do desempenho da cultura sob condições climáticas atuais e futuras
• Beneficiário: Henrique Boriolo Dias
• Linha de fomento: Bolsas no Brasil - Doutorado