Received: 05-05-2021 / Accepted: 29-10-2021
The objective of this study was to determine the effect of nitrogen level and N-fixing rhizobacteria on growth and yield of sesame in undeposited alluvial soil. The experiment was arranged in a randomizedcompleteblock design with four replications. The first factor was nitrogen fertilizer levels (0, 50, 75 and 100%of recommendation rate);the second factor was application of bacteria: no rhizobacteria, a single strain AGVRB-07, single strain AGVRB-28,andthemixture of strains AGVRB-07 and AGVRB-28. The results showed that a reduction of nitrogen fertilizer application resulted in lower plant height, number of leaves per plant, leaf length, leaf width, number of flowers per plant, number of capsules per plant, capsule diameter, number of rows per capsule and grain yield. However, addition of N-fixing rhizobacteria as single strain AGVRB-07, AGVRB-28 or the mixture of AGVRB-07 and AGVRB-28 improvedplant height, number of capsules per plant and grain yield. The supplement of single strain or mixture of 2 strains also contributed to reducing approximately 25% of chemical nitrogen fertilizer as recommended, but sesame grain yield wasmaintained comparable to the full rate of nitrogen application.