Improving Rice Seed Quality Through the Combined Application of DBD Plasma and CuO NPs

Jira Praditwanich, Yothin Chimupala, Pilunthana Thapanapongworakul, Choncharoen Sawangrat, Dheerawan Boonyawan, Chommanad Sawadeemit and Sa-nguansak Thanapornpoonpong ()
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Jira Praditwanich: Department of Plant and Soil Science, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Yothin Chimupala: Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50202, Thailand
Pilunthana Thapanapongworakul: Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Choncharoen Sawangrat: Department of Industrial Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
Dheerawan Boonyawan: Plasma and Beam Physics Research Facility, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Chommanad Sawadeemit: Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50202, Thailand
Sa-nguansak Thanapornpoonpong: Department of Plant and Soil Science, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand

Agriculture, 2025, vol. 15, issue 21, 1-29

Abstract: This study examined the effects of dielectric barrier discharge (DBD) plasma and copper oxide nanoparticles (CuO NPs) on rice seed quality, seedling growth, and fungal inhibition. Sanpatong 1 rice seeds were treated with DBD plasma at three exposure durations (0.4, 0.6, and 0.8 s/cm) and coated with CuO NP solutions at five concentrations (0, 0.02, 0.04, 0.06, and 0.08 M). The experiment followed a split-split-plot design within a randomized complete block design (RCBD), with storage time (0, 2, 4, and 6 months) as the main plot factor. Plasma etching improved seed surface wettability, while CuO NPs increased copper uptake and promoted growth at 0.04–0.06 M but caused toxicity at 0.08 M. Combined treatments suppressed Rhizopus sp. and Rhizoctonia solani , though Aspergillus spp. were less affected. Seed quality declined after six months of storage, likely due to oxidative stress. The best results were obtained with 0.6 s/cm plasma and 0.06 M CuO NPs, maximizing germination, vigor, and seedling growth without toxicity, demonstrating their potential as practical tools for improving rice seed quality and pathogen management.

Keywords: DBD plasma; CuO NPs; rice seed; seed quality; fungal disinfection (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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