Effect of plant growth promoting rhizobacteria bio capsules on growth and yield of turmeric

Abstract

The trial has been conducted at the turmeric research station, Kammarpally for the continuous of three years from 2018-19 to 2020-21 to assess the potential of plant growth promoting rhizobacteria (PGPR) capsules developed by Indian Institute of Spices Research in turmeric cultivation. PGPRs associated with plant growth processes such as nitrogen fixation, phosphate solubilization, and hormone secretion. PGPR has multiple ecological and practical functions in the soil’s rhizosphere. One of PGPR’s various roles in agro ecosystems is to increase the synthesis of phytohormones and other metabolites, which have a direct impact on plant growth. A field experiment has been conducted to study different PGPRs in turmeric with three varieties Duggirala Red, IISR Pragathi, IISR Prathibha and five different PGPR combinations T1-POP + Trichoderma (Talc formulations) + GRB 35 (Talc formulations), T2- POP + Trichoderma capsules + GRB 35 capsule, T3- POP + Trichoderma capsules, T4- POP + GRB 35 capsule, T5- POP (Recommended package of practices). In this trial T2V1- POP + Trichoderma capsules + GRB 35 capsule with Duggirala red variety has been given highest fresh rhizome yield (38.32 t/ha) followed by T2V3-+ Trichoderma capsules + GRB 35 capsule with IISR-Prathibha variety (35.91 t/ha).