Yield performances of rice varieties (Oryza sativa) under nano-CuO and nano-ZnO micronutrient fertilizers

Abstract. Sandanayake CLT, Weerakoon SR, Karthikeyan N, Somaratne S. 2022. Yield performances of rice varieties (Oryza sativa) under nano-CuO and nano-ZnO micronutrient fertilizers. Nusantara Bioscience 14: 95-103. Rice sativa L.) is a major staple food in the world. There an extreme need for higher yield to meet ever-increasing demand with rise population despite hampering impact climatic changes. Nanotechnology plays potential role security introduces nano fertilizers as alternative conventional Therefore, present research was carried out determine effects fertilizers; nano-CuO, on selected varieties, Bg360, BW364, Kaluheenati, Kuruluthuda. Sol-gel thermal decomposition methods synthesized nano-fertilizers used study. Nano-ZnO, nano-CuO-ZnO composite treatments were applied foliar spray at concentrations 30 mg L-1 (T1), 60 (T2), 120 (T3) double deionized water served control (T0). The during growth stage [at 48-58 days after sowing (DAS)] grain filling [100-105 DAS], while plants provided appropriate levels P, K fertilizers, recommended by Department Agriculture. A Complete Randomized Block Design employed three blocks five replicates each block. parameters recorded harvesting stage. Descriptive statistics such mean standard error inferential performed data obtained. ANOVA interaction terms assess significant differences between treatments. descriptive analyses show increase application nano-fertilizers. suggests effect (p ? 0.05) Both traditional inbred indicated response