<![CDATA[Seaweed (Kappaphycus alvarezii) liquid extract contains hormones, and macro and micronutrients that might benefit plant growth and development. This study aimed to evaluate the effect of a biostimulant liquid of seaweed extract on the vigor of rice seedlings. The research was conducted in the experimental field of the Faculty of Agriculture, Halu Oleo University, Kendari, Southeast Sulawesi. A factorial treatment design was conducted with a randomized block design. The first factor was the seedling method (wet sowing (S1) and dry sowing (S2)), and the second factor was six biostimulant concentrations (no biostimulant (K0), 0.8% (K1), 1.6% (K2), 2.4% (K3), 3.2% (K4), and 4.0% (K5)). The observed variables included seedling height, leaf area, number of tillers, root dry weight, and seedling dry weight. Data were analyzed using ANOVA, and DMRT at α = 0.05. The results showed that the wet sowing method produced better seedling vigor than the dry sowing method after 14 days. The wet sowing method combined with a 0.8% seaweed extract resulted in the highest seedling vigor. The present study concluded the biostimulant potential of seaweed extract for rice. Keywords: Dry sowing; Oryza sativa; seedling vigor; sowing method; wet sowing]]>
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