PENGARUH KONSENTRASI PGPR (Plant Growth Promoting Rhizobacteria) TERHADAP PERTUMBUHAN BIBIT PADI (Oryza sativa L.)

Dewi Syafrina; Ruly Awidiyantini; Lia Kristiana

doi:10.31102/agrosains.2026.11.1.105-126

Authors

Dewi Syafrina Pertanian
Ruly Awidiyantini Universitas Islam Madura
Lia Kristiana Universitas Islam Madura

DOI:

https://doi.org/10.31102/agrosains.2026.11.1.105-126

Keywords:

IPB 3S, PGPR, rice, vegetative growth

Abstract

Plant Growth Promoting Rhizobacteria (PGPR) are beneficial microorganisms capable of enhancing plant growth by improving nutrient availability, producing phytohormones, and stimulating root development. This study aimed to evaluate the effect of different PGPR concentrations on the growth of rice seedlings (Oryza sativa L.) cultivar IPB 3S. The experiment was arranged in a Completely Randomized Design (CRD) consisting of six treatments: control (0 mL), PGPR at 25, 50, 75, 100, and 125 mL, with four replications. Growth parameters observed included plant height, leaf length, leaf width, number of leaves, root length, and fresh weight at 7, 11, 15, 19, and 23 days after sowing. Data were analyzed using analysis of variance (ANOVA), followed by the Least Significant Difference (LSD) test at the 5% significance level. The results showed that PGPR application did not significantly affect seedling growth during the initial stage (7–11 days after sowing), but significantly improved plant height, leaf length, leaf width, root length, and fresh weight from 15 days after sowing onward. The PGPR concentration of 25 mL produced the best performance for most growth parameters, whereas higher concentrations (≥75 mL did not further improve seedling growth. Therefore, the application of PGPR at 25 mL is recommended as the optimum concentration for promoting rice seedling growth during the nursery stage.

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