University of Tabriz Journal of Agricultural Science and Sustainable Production 2476-4310 31 1 2021 04 21 The Study of Yield and Physiological Characteristics of Pearl Millet (Pennisetum glaucum) in Response to Bio-Fertilizers and Different Irrigation Regimes The Study of Yield and Physiological Characteristics of Pearl Millet (Pennisetum glaucum) in Response to Bio-Fertilizers and Different Irrigation Regimes 23 37 12774 10.22034/saps.2021.12774 FA Majid Ghanbari 0000-0003-2457-1177 Ali Mkhtassi-Bidgoli Kamran Mansour Ghanaei-Pashaki Parniyan Talebi-Siah Saran Journal Article 2020 04 28 <strong>Background and Objective: </strong>This study was conducted to investigate the effect of bio-fertilizers application on reducing the effects of water deficit on Pearl Millet under field conditions. <strong> </strong> <strong>Materials and Methods:</strong> The experiment was carried out as a factorial experiment based on randomized complete block design with three replications in selected farms under Agronomy Department of Tarbiat Modares University with cooperation of Lahijan Agricultural Jihad (Kolashtajan Agricultural Extension Office) in 2019 year. Planting date was 9 April 2019. Treatments included three levels of stress include irrigation times (15 (control), 30 (moderate stress) and 45 (severe stress) percent depletion of available soil moisture and four levels of bio-fertilizer (control, nitroxin, BARVAR phosphate-2, nitroxin + BARVAR phosphate-2). <strong> </strong> <strong>Results: </strong>The results showed that plant height, chlorophyll a and b, grain yield and catalase activity were significant for different irrigation regimes and bio-fertilizers, harvest index, photosynthesis and peroxidase activity were significant for interaction of different irrigation regimes and bio-fertilizers. Combined application of nitroxin and BARVAR phosphate-2 increased 13.12% plant height, 40.54% and 45.83% chlorophyll a and b, 19.29% seed yield, 30.62% photosynthesis rate, 41.12% and 36.18%, catalase and peroxidase enzymes activity of pearl millet under different irrigation regimes. <strong> </strong> <strong>Conclusion:</strong> Experiment results showed that improvement of morphological, physiological characteristics and increasing the resistance of pearl millet to drought stress conditions due to the use of bio-fertilizers. In general, by increasing vegetative growth and leaf chlorophyll content, increasing plant photosynthesis rate and increasing the activity of stress-resistant enzymes, the application of nitroxin and BARVAR phosphate-2 bio-fertilizers can be considered suitable for improving the quantitative performance of pearl millet under moisture stress conditions in Guilan plain areas.     <strong>Background and Objective: </strong>This study was conducted to investigate the effect of bio-fertilizers application on reducing the effects of water deficit on Pearl Millet under field conditions. <strong> </strong> <strong>Materials and Methods:</strong> The experiment was carried out as a factorial experiment based on randomized complete block design with three replications in selected farms under Agronomy Department of Tarbiat Modares University with cooperation of Lahijan Agricultural Jihad (Kolashtajan Agricultural Extension Office) in 2019 year. Planting date was 9 April 2019. Treatments included three levels of stress include irrigation times (15 (control), 30 (moderate stress) and 45 (severe stress) percent depletion of available soil moisture and four levels of bio-fertilizer (control, nitroxin, BARVAR phosphate-2, nitroxin + BARVAR phosphate-2). <strong> </strong> <strong>Results: </strong>The results showed that plant height, chlorophyll a and b, grain yield and catalase activity were significant for different irrigation regimes and bio-fertilizers, harvest index, photosynthesis and peroxidase activity were significant for interaction of different irrigation regimes and bio-fertilizers. Combined application of nitroxin and BARVAR phosphate-2 increased 13.12% plant height, 40.54% and 45.83% chlorophyll a and b, 19.29% seed yield, 30.62% photosynthesis rate, 41.12% and 36.18%, catalase and peroxidase enzymes activity of pearl millet under different irrigation regimes. <strong> </strong> <strong>Conclusion:</strong> Experiment results showed that improvement of morphological, physiological characteristics and increasing the resistance of pearl millet to drought stress conditions due to the use of bio-fertilizers. In general, by increasing vegetative growth and leaf chlorophyll content, increasing plant photosynthesis rate and increasing the activity of stress-resistant enzymes, the application of nitroxin and BARVAR phosphate-2 bio-fertilizers can be considered suitable for improving the quantitative performance of pearl millet under moisture stress conditions in Guilan plain areas.     https://sustainagriculture.tabrizu.ac.ir/article_12774_48939a958775c4f549d5a98ae9eafe79.pdf