Abstract

The research was aimed to examine the effectiveness of the Bacillus tropicus (BT), Acinetobacter junii (AJ) and B. subtilis (BS) bacterial consortium in increasing the growth and yield of rice (Oryza sativa L.). This research was conducted at Experimental Farm and Agronomy & Horticulture Laboratory, Faculty of Agriculture, Jenderal Soedirman University, Purwokerto from June to October 2023. This study was designed using a non-factorial Randomized Block Design with 9 treatments and repeated three times and there were 27 experimental units. The treatments included A (positive control with NPK fertilization), B (negative control without NPK fertilization), C (BT), D (AJ), E (BS), F (BT + AJ), G (BT + BS), H (AJ + BS), I (BT + AJ + BS). The test plant used Inpari Unsoed 79 Agritan rice variety. Results showed that the diazotrophic bacteria consortium was able to increase plant growth seen from leaf area, plant dry weight, root dry weight and was able to induce nitrate reductase enzyme activity. The BT + AJ + BS consortium was the best treatment that was able to provide the best grain yield, reaching 22.89 g per clump.