Effect of organic manures, PGPR and micronutrients on yield and quality enhancement in ajwain (Trachyspermum ammi L)

Abstract

Experiments were conducted for two consecutive years during 2017-19 to study the effect of organic manures, PGPR and micronutrients on yield and quality of ajwain seed. Farm yard manure (FYM) and vermicompost (VC) were used as organic sources at 50% and 75% recommended dose of nitrogen (RDN) as basal dose. PGPRs namely Azospirillum lipoferum, Bacillus megaterium and Frateuria aurantia were used for seed priming. Micronutrients namely ZnSO4 and Fe2SO4 were applied thrice as foliar application @ 0.5% first before flowering, second at 50% flowering and third during grain formation. The results revealed that highest number of umbels plant-1, umbellets umbel-1, number of fruits umbellet-1, seed yield plant-1, seed yield hectare-1, straw yield, biological yield, test weight of seeds and essential oil yield were recorded with the application of 50% RDN through VC, which was on par with 50% RDN through FYM, seed priming with Azospirillum and foliar application of zinc with respect to their individual effect. Maximum essential oil content, fixed oil content and thymol content were also observed in case of application of 50% RDN through VC, seed priming with Azospirillum and foliar application of zinc individually. Highest Benefit Cost Ratio (BCR) of 3.33 was recorded with combined application of 50% of RDN through FYM along with seed priming with Azospirillum and foliar spray of Zn at 0.5%. The integrated use of organic manures, PGPRs and micronutrients could also exert significant influence on yield and quality of Ajwain. It was observed that highest seed yield, yield attributing characters and essential oil yield and quality parameters were recorded with combined application of 50% of RDN through vermicompost along with seed priming with Azospirillum and foliar application of zinc which was statistically on par with application of 50% of RDN through FYM along with seed priming with Azospirillum and foliar application of zinc.

Assessment of Productivity Dyanamics of Chickpea based Intercropping with Linseed and Seed Spices on BBF under Organic Cultivation

“…Similar findings reported in Alam (2017) Assessment of Productivity Dyanamics of Chickpea based Intercropping with Linseed and Seed Spices on BBF under Organic Cultivation zone with higher metabolic activity at the cellular level might have enhanced the nutrient uptake and accumulation in the vegetative parts, which in turn resulted in higher dry mater content in ajwain. Similar findings reported by (Thanuja et al, 2020).…”

Seed yield and its characteristics studies variability correlation and a path coefficient ajwain (Trachyspermum ammi L.)

“…The enormous diversity present across all the traits is indicated by the mean square sum, which for all the qualities was found to be highly significant. Moderate values of the genotypic and phenotypic coefficient of variation were discovered for Singh et al (2019) [14] , Nagar et al (2018) [11] , Subramaniyam et al (2018) [16] , and Ghanshyam et al (2015) [5] in the number of branches per plant, number of umbels per plant, number of umbelletes per umbel, number of seeds per umbel, seed yield per plant, biological yield per plant, test weight, and volatile oil (Table .1, Fig. 1).…”

“…Meena et al (2016) [9] obtained a similar result in relation to plant height. The number of branches per plant had a directly detrimental impect on seed yield per plant, according to studies by Ghanshyam et al (2015) [5] and Subramaniyam et al (2018) [16] . While Ghanshyam et al (2015) [5] and Subramaniyam et al (2018) [16] reported identical results for the number of umbels per plant, Ghanshyam et al (2015) [5] found similar results for the number of umbelletes per umbel.…”

“…The number of branches per plant had a directly detrimental impect on seed yield per plant, according to studies by Ghanshyam et al (2015) [5] and Subramaniyam et al (2018) [16] . While Ghanshyam et al (2015) [5] and Subramaniyam et al (2018) [16] reported identical results for the number of umbels per plant, Ghanshyam et al (2015) [5] found similar results for the number of umbelletes per umbel. An earlier study by Subramaniyam et al (2018) [16] found that the number of seeds per umbel had a negatively direct impact on the seed yield per plant (2018).…”

Correlation and path coefficient analysis in yield and yield related components of Ajwain (Trachyspermum ammi L.) genotypes under Eastern dry zone of Karnataka

“…Negative link of days to maturity with seed yield per plant is due to sudden increase in the temperature which led to sucking pest (aphids) infestation on the crop during the investigation. The reports of Ranjeetha et al (2020 and 2021) [21,22] in ajwain genotypes, Ghanshyam et al (2015) [10] and Faravani et al (2018) [8] in ajwain genotypes/ accessions, Kassaun et al (2013) [14] , Jain et al (2013) [13] , Patahk et al (2014) [17] and Meena et ~ 508 ~ al. (2014) [18] in coriander accessions, Singh et al (2016) [25] and Gurjar et al (2016) [12] in fenugreek genotypes and Bahraminejad et al (2011) [2] in cumin ecotypes supports the present findings.…”