Effect of Plant Growth Promoting Rhizohacteria on agro-physiological traits of safflower cultivars (Carthamus tinctorius L) under rainfed conditions in Ilam region
Subject Areas : Agriculture and plant breedingRahim Naseri 1 * , Amir Mirzaei 2
1 - Department of Plant Production Technology, Dehloran Faculty of Agriculture and Engineering, Ilam University, Ilam, Iran
2 - Crop and Horticultural Science Research Department, Ilam Agricultural and Natural Resources Research and Education Center, AREEO, Ilam,Iran
Keywords: Azospirillum, Grain yield, Mesophilic conductivity, Net photosynthesis, Transpiration. ,
Abstract :
In order to investigate the effect of plant growth promoting rhizobacteria on grain yield and gas exchange, of dry land safflower cultivars, a factorial field experiment was counducted in a randomized complete block design with three replications on the farms of Sarablah Agricultural Research Center, Ilam during 2021-2022 cropping Season. Experimental treatments included different safflower cultivars (Faraman, Goldasht, Sina and Omid) and treatment of different fertilizer sources (without fertilizer source, 50% N fertilizer recommended, Azospirillum+50% N fertilizer recommended, Azetobacter+50% N fertilizer recommended, Azospirillum+Azetobacter+50% N fertilizer recommended and 100% N fertilizer recommended). The results of this study showed that interaction of cultivar × fertilizer sources were significant on yield, grain yield components as well as gas exchanges in safflower under dryland conditions. The highest head per plant, seed per head, 1000-grain weight, seed yield, biological yield, net photosynthesis, transpiration, mesophilic conductance and photosynthetic water use efficiency were obtained from the interaction of Sina cultivar× Azospirillum+Azetobacter+50% N fertilizer. The results of this research showed that the combined use of nitrogen fertilizer (50% less) along with biological fertilizer (Azotobacter + Azospirillium) in addition to being able to avoid the wastage of nitrogen fertilizer and environmental pollution in dry land conditions, It can improve the growth and production of safflower cv. Sina.
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