A field trial was conducted during the Kharif- 2024 at the Research cum Instructional Farm of Shaheed Gundadhur College of Agriculture and Research Station, IGKV, Jagdalpur, Chhattisgarh, to evaluate the effectiveness of various plant growth regulators and biostimulants on growth and yield performance of transplanted rice. The study was laid out in a Randomized Complete Block Design (RCBD) with eleven treatments, it was replicated three times. The findings of the study indicated that application of Paclobutrazol @ 0.5 ml L-1 (T10) recorded highest number of effective tillers at 60, 90, and 120 DAT, while treatment T11 (control) showed the lowest. Dry matter accumulation was recorded highest in treatment T10 (Paclobutrazol @ 0.5ml L-1) which was on par with T4 (Humic acid @ 8ml L-1) and T8 (Triacontanol @ 2ml L-1). Crop growth rate was highest in T10 (Paclobutrazol @ 0.5 ml L-1) at 60 DAT and in T7 (Triacontanol @ 1 ml L-1) at 90 and 120 DAT. Relative growth rate was highest in T4 (Humic acid @ 8ml L-1) during 90-120 DAT. NAR peaked in T10 (Paclobutrazol @ 0.5 ml L-1) at 30-60 DAT, T7 (Triacontanol @ 1 ml L-1) at 60-90 DAT and T9 (Paclobutrazol @ 0.25ml L-1) at 90-120 DAT. Yield attributes (grains panicle-1, grain and straw yield, harvest index) were significantly highest in T2 (Ascophyllum nodosum @ 6 ml L-1).
