Abstract

In order to study effects of Azotobacter and Mycorrhiza fungus on yield and yield components of wheat varieties and quality of derived seeds under supplementary irrigation, an experiment was conducted as a factorial arranged in a RCBD with three replications in Agricultural Research Center of Gorgan. Experimental factors including two irrigated wheat varieties including N-80-20 and Gonbad Cv., six levels of inoculations including control (without biologic fertilizer), application of Mycorrhiza (Glomus intraradices), inoculation with Azotobacter crococum (powdery), inoculation with commercial liquid Azotobacter and Mycorrhiza, inoculation with Azotobacter crococum (powdery) and Mycorrhiza, inoculation with commercial liquid Azotobacter and Mycorrhiza, and three levels of supplementary irrigation (non-irrigated, irrigation at booting and irrigation at full heading phases). Results revealed that inoculation of wheat varieties with a combination of Azotobacter and Mycorrhiza induced seed yield and yield components increment as well as quality improvement of derived seeds. Supplementary irrigation at heading phase had more positive effects on traits of wheat varieties. Considering to the investigated characteristics, N-80-20 had a better response to seed inoculation and supplementary irrigation comparing to Gonbad cultivar. It seems that, application of biological fertilizers and supplementary irrigation is an appropriate and low-cost method for increasing of yield and improvement of seed quality of wheat. In order to increase the seed yield and improvement of seed quality, inoculation of seeds with a joint combination of Azotobacter and Mycorrihza along with supplementary irrigation at heading stage of wheat could be recommended

Authors and Affiliations