SLIIT Conference and Symposium Proceedings
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All SLIIT faculties annually conduct international conferences and symposiums. Publications from these events are included in this collection.
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Publication Open Access Climate-Based Agri-Insurance Method for Paddy Production in Sri Lanka(Mathematics and Statistics, Faculty of Humanities and Sciences, SLIIT, 2025-10-10) Vijayakumar, JClimate change has emerged as a major threat to agriculture globally, and Sri Lanka is no exception. The districts of Ampara, Anuradhapura, and Polonnaruwa are the main producers of paddy. In recent decades, these regions have experienced greater climate variability, leading to unstable harvests and posing financial risks for paddy farmers. This study examines the potential of Weather Index Insurance (WII) as an effective tool to mitigate income losses caused by extreme weather events. Historical data on paddy yields were combined with daily weather records. The analysis focused on relationships between paddy yields and weather variables: total rainfall, average temperature, maximum and minimum temperatures, and extreme monthly temperatures in the regions for both the Maha and Yala cultivation seasons. Regression models identified significant correlations, and insurance indices were designed for each district and season, with pure premiums calculated based on these relationships. The results indicate that total rainfall is the most significant factor influencing yield variability across all three districts in different seasons. The proposed insurance models were able to reduce income variability by 15–19%. These findings indicate that rainfall is the most reliable basis for climate-resilient paddy insurance in these regions. This data-driven framework for index-based agricultural insurance provides insights to enhance farmer resilience, reduce economic vulnerability for farmers, and support the long-term sustainability of production in those regions.Publication Open Access Growth Parameters and Grain Yield of Rice (Oryza sativa L.) as Affected by Biofilm Biofertilizer Application(Faculty of Humanities and Sciences - SLIIT, 2021-03-26) Ketipearachchi, K.G.; Seneviratne, G.; Fonseka, D.L.C.K.Overuse of synthetic fertilizer causes a number of detrimental impacts on both human and environmental health. Hence, beneficial microbial biofilm-based Biofilm biofertilizers (BFBFs) have been developed to make agro ecosystems more eco- friendly. Accordingly, it has been revealed that the BFBFs can reduce current application of chemical fertilizers (CF) in rice even up to 50% without hampering grain yield in field experiments in research stations. Thus, the aim of the present study was to evaluate growth parameters and grain yield of rice after application of BFBF in farmers’ fields. The experiment was designed in block design for paired comparison with uniform, consecutive paddy fields in 12 farmer fields in the Polonnaruwa district. The farmers’ CF practice (N: P: K; 155:20:20) and BFBF practice (1 L BFBF with N: P: K; 59:15:16) were applied as treatments with 12 location replicates per treatment in the Yala 2018 season. Means of shoot and root dry weights per plant, thousand grain weight and yield of the two practices were evaluated. T-test was used for mean comparison. Results indicated that there is a significant increase (P < 0.05) in shoot (53%) and root (89%) dry weights per plant and thousand grain weight (18%) in BFBF practice compared to the farmers’ CF practice. Further, the average grain yield of the BFBF practice was 5,112 kg/ha whereas that of farmers’ CF practice was 4,238 kg/ha, a 21% increment in the grain yield. Hence, it can be concluded that the BFBF can enhance plant growth and grain yield while reducing farmers’ use of CF in paddy fields.