University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 36 1 2026 05 21 Evaluation of organic and bio-fertilizers using on yield and essential oil production of green basil (Ocimum basilicum L.) in Kelardasht region Evaluation of organic and bio-fertilizers using on yield and essential oil production of green basil (Ocimum basilicum L.) in Kelardasht region 57 74 21427 10.22034/saps.2024.62496.3250 FA Hamid Reza Chalajour Department of Agronomy, Roudehen Branch, Islamic Azad University, Roudehen, Iran Mohammad Taghi Darzi Department of Agronomy, Roudehen Branch , Islamic Azad University, Roudehen, Iran Mohammadreza Haj Seyed Hadi Department of Agronomy, Roudehen Branch , Islamic Azad University, Roudehen, Iran Journal Article 2024 07 14 <strong>Abstract</strong> <strong>Background & Objectives:</strong> Production of medicinal plants with using from organic and bio-fertilizers leads to increase of quantity and quality of active substances such as essential oil. This study was conducted to evaluate the effects of organic and bio-fertilizers on yield and essential oil production of green basil in order to reducing of chemical fertilizer application in Kelardasht region.   <strong>Materials and Methods:</strong> The experiment was conducted based on a randomized complete block design with six treatments and three replications in Kelardasht of Iran in 2021. The treatments were vermicompost (10 t.ha^-1), nitroxin (2 lit. ha^-1), bio-superphosphate (2 lit. ha^-1), nitroxin + bio-superphosphate, vermicompost + nitroxin + bio-superphosphate, chemical fertilizer (80 and 60 kg. ha^-1 nitrogen and phosphorus, respectively). The measured traits included plant height, dry weight of plant, nitrogen percent in leaf, herb yield, essential oil content, essential oil yield, contents of citral,<strong> </strong>Methyl chavicol, E-Caryophyllene, trans-α-bergamotene in essential oil.   <strong>Results:</strong> The results showed that treatments had significant effects on studied traits, as the highest plant height (36.5 cm) in treatment of bio-superphosphate, the highest dry weight of plant (7.66 g plant^-1) and nitrogen percent in leaf (2.06%) in integrated treatment of nitroxin and bio-superphosphate and the highest herb yield (653.2 kg.ha^-1), essential oil content (0.44%) and essential oil yield (2.88 kg.ha^-1) in treatment of vermicompost were obtained. In an investigation of essential oil components, the highest citral<strong> </strong>content (58.33%) in in treatment of bio-superphosphate and then treatment of vermicompost application (55.23%), the highest E-Caryophyllene content (4.37%) in treatment of vermicompost and the highest Methyl chavicol<strong> </strong>content (43.17%) in chemical fertilizer were obtained. <strong> </strong> <strong>Conclusion:</strong> In general, the results of this study showed, the application of organic and bio fertilizers, specially vermicompost in comparison to chemical fertilizer had a considerable role in increasing of yield and quantity and quality of essential oil of basil.   <strong>Abstract</strong> <strong>Background & Objectives:</strong> Production of medicinal plants with using from organic and bio-fertilizers leads to increase of quantity and quality of active substances such as essential oil. This study was conducted to evaluate the effects of organic and bio-fertilizers on yield and essential oil production of green basil in order to reducing of chemical fertilizer application in Kelardasht region.   <strong>Materials and Methods:</strong> The experiment was conducted based on a randomized complete block design with six treatments and three replications in Kelardasht of Iran in 2021. The treatments were vermicompost (10 t.ha^-1), nitroxin (2 lit. ha^-1), bio-superphosphate (2 lit. ha^-1), nitroxin + bio-superphosphate, vermicompost + nitroxin + bio-superphosphate, chemical fertilizer (80 and 60 kg. ha^-1 nitrogen and phosphorus, respectively). The measured traits included plant height, dry weight of plant, nitrogen percent in leaf, herb yield, essential oil content, essential oil yield, contents of citral,<strong> </strong>Methyl chavicol, E-Caryophyllene, trans-α-bergamotene in essential oil.   <strong>Results:</strong> The results showed that treatments had significant effects on studied traits, as the highest plant height (36.5 cm) in treatment of bio-superphosphate, the highest dry weight of plant (7.66 g plant^-1) and nitrogen percent in leaf (2.06%) in integrated treatment of nitroxin and bio-superphosphate and the highest herb yield (653.2 kg.ha^-1), essential oil content (0.44%) and essential oil yield (2.88 kg.ha^-1) in treatment of vermicompost were obtained. In an investigation of essential oil components, the highest citral<strong> </strong>content (58.33%) in in treatment of bio-superphosphate and then treatment of vermicompost application (55.23%), the highest E-Caryophyllene content (4.37%) in treatment of vermicompost and the highest Methyl chavicol<strong> </strong>content (43.17%) in chemical fertilizer were obtained. <strong> </strong> <strong>Conclusion:</strong> In general, the results of this study showed, the application of organic and bio fertilizers, specially vermicompost in comparison to chemical fertilizer had a considerable role in increasing of yield and quantity and quality of essential oil of basil.   https://sustainagriculture.tabrizu.ac.ir/article_21427_6552ef62b00c06ec347ae59814bfe19e.pdf