Interaction between type of plant growth promoting rhizobacteria and patchouli varieties on growth and yield of patchouli (Pogostemon cablin Benth.)

Abstract A group of bacteria living in the rhizosphere area and capable to actively colonize the plant's root system called Plant Growth Promoting Rhizobacteria (PGPR). These bacteria can improve plant growth and yield. We determine the interaction between types of PGPR and patchouli varieties on growth and yield. This research was conducted at the Laboratory of Seed Science and Technology and Experimental Farm, Faculty of Agriculture, Syiah Kuala University, between January to June 2020. The collecting data from experiment were analyzed by factorial randomized block design with three replications. Seven type of rhizobacteria consist used without rhizobacteria, Necercia sp., Pseudomonas capacia, Bacillus firmus, Bacillus bodius, Bacillus alvei, Bacillus stearothermophillus. The varieties consist of three levels Tapak Tuan, Lhokseumawe, and Sidikalang. There was very significant interaction between rhizobacteria and varieties on the parameters of fresh weight and dry weight and significant interactions on plant height at 60 and 120 DAP, number of branches at 90 and 120 DAP, and leaf area. Variety of Sidikalang combination with P. capacia have very high wet weight (73.43 g), dry weight (18.05 g), and leaf area (84.00 cm2).