Plant growth promoting rhizobacteria application increased growth and yield of shallot supplied with NPK fertilizer

Abstract

ABSTRACT Shallot (Allium cepa L. var. Aggregtum group) production fluctuates duo to use of synthetic fertilizer. The effect of how Plant Growth Promoting Rhizobacteria (PGPR) and NPK affect growth and yield of shallot in a pot experiment were examined. The first factor consisted of 0, 10, 20, and 30 mL·L−1 of PGPR, the second treatment consisted of 0.8, 1.2, or 1.6 g of NPK per pot. There was no interaction between PGPR and synthetic fertilizer on growth and yield. The PGPR increased growth and yield of shallot when PGPR doses rose. The 30 mL·L−1 basal dose of PGPR increased plant height (39.96 cm), number of leaves per plant (42.33), fresh bulb weight per plant (53.46 g), and number of bulbs per plant (9.78). The 1.8 g NPK increased number of leaves (42.17) and number of fresh bulbs per plant (9.25), which gradually decreased when doses were reduced. Increasing applied synthetic fertilizer produced improved growth and yield of shallot. Under sustainable crop management, PGPR application could further enhance growth and yield of shallot.