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

Dias, Henrique Boriolo, Inman-Bamber, Geoff, Bermejo, Rodrigo, Sentelhas, Paulo Cesar, and Christodoulou, Diomedes (2019) New APSIM-Sugar features and parameters required to account for high sugarcane yields in tropical environments. Field Crops Research, 235. pp. 38-53.

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Abstract

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.

Item ID: 58138
Item Type: Article (Research - C1)
ISSN: 1872-6852
Keywords: Saccharwn spp., Crop modelling, Photosynthetically active radiation, Sugarcane yield potential, Radiation use efficiency, Reduced growth phenomenon
Copyright Information: © 2019 Elsevier B.V. All rights reserved
Funders: São Paulo Research Foundation (FAPESP), Brazilian Research and Development Council (CNPq)
Projects and Grants: FAPESP (grant#2017/24424-5), FAPESP (grant#2016/11170-2), CNPq Fellowship (Level 1A)
Date Deposited: 24 Apr 2019 07:36
FoR Codes: 01 MATHEMATICAL SCIENCES > 0104 Statistics > 010401 Applied Statistics @ 50%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0703 Crop and Pasture Production > 070303 Crop and Pasture Biochemistry and Physiology @ 50%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8203 Industrial Crops > 820304 Sugar @ 100%
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