Author(s):

GS Thanuja, B Sreenivasulu, KM Yuvaraj, K Giridhar, U Umakrishna and P Latha

Abstract: The present experiment entitled “Effect of organic manures, plant growth promoting rhizobacteria and micronutrients on growth, grain yield and quality of Ajwain (Trachyspermum ammi L.)” was carried out to study the individual and interaction effect of organic manures, PGPR and micronutrients on vegetative growth, yield and quality of Ajwain seed. Farm yard manure and vermicompost were used as organic source at 50% and 75% recommended dose of nitrogen (RDN).PGPRs namely Azospirillum lipoferium, Bacillus megathurium and Frateuria aurantia were used for seed priming. Micronutrients namely, ZnSO₄ and Fe₂SO₄ were applied as foliar spray The result revealed that sole application of vermicompost and FYM showed significantly effect on par on growth, grain yield, quality aspects of Ajwain. Among the PGPRs and micronutirents, seed priming with Azospirillum lipoferium and foliar application of zinc were found significantly superior in augmenting higher plant growth, yield and quality. Application of 50% of RDN through vermicompost and seed priming with Azospirillum along with foliar application of zinc was statistically on par with application of 50% of RDN through FYM and seed priming with Azospirillum along with foliar application of zinc in promoting growth, dry matter content per plant, grain yield, essential oil, fixed oil and thymol content of Ajwain.

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