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Validation of APSIM for long duration rice varieties in different agro-climatic zones of Sri Lanka


Fernando, MEKK and Amerasekara, DABN and Amarasingha, RK and Suriyagoda, LDB and Marambe, B and Galagedara, LW and Silva, GLLP and Punyawardena, R and Parsons, D and Meinke, H, Validation of APSIM for long duration rice varieties in different agro-climatic zones of Sri Lanka, Proceedings of the 17th Australian Society of Agronomy Conference, 20-24 September 2015, Hobart, Australia, pp. 1-4. (2015) [Refereed Conference Paper]

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Copyright 2015 Australian Society of Agronomy Inc.

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Rice (Oryza sativa L.) is the staple food for many Asians. In Sri Lanka, rice production is heavily dependent on the rainfall distribution pattern, and would be adversely affected by climate change. Prediction and estimation of yield and resource-use efficiency of commonly grown rice varieties is of immense importance under a variable and changing climate. Agricultural system simulation models are useful tools to assess the performance of agricultural systems under scenarios of changing rainfall patterns. The present study was conducted to validate the Oryza module of the Agricultural Production Systems Simulator (APSIM) model for two long duration rice varieties, Bg403 and Bg379-2 (4 months maturity). Model evaluation was done using secondary data. APSIM simulated the observed rice yields for Bg403 and Bg379-2 with a strong fit (R2 of 0.88 and 0.77, respectively, and CV of 9.9% and 14.4%, respectively). Yield was less when grown under rainfed condition than under irrigation for both the varieties. The highest simulated yield loss was observed at Aralaganwila (Dry-Zone Low Country), where a 10% reduction in the seasonal rainfall was simulated. The validated APSIM-Oryza module can be used in evaluating the potential areas for rice cultivation in Sri Lanka under current and predicted climate change scenarios.

Item Details

Item Type:Refereed Conference Paper
Keywords:low-land rice, productivity, water scarcity
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Agriculture, land and farm management
Research Field:Sustainable agricultural development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Rice
UTAS Author:Parsons, D (Dr David Parsons)
UTAS Author:Meinke, H (Professor Holger Meinke)
ID Code:107228
Year Published:2015
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2016-03-08
Last Modified:2017-11-02
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