The study of Symbiotic of mycorhiza and phosphor fertilizer on yield and yield components of corn in Robat karim region

In order to investigate the effects of mycorhiza fertilizer and to reduce chemical fertilizer on yield components of corn, an experiment was conducted on Robat Karim region farm during 2014-2015. The experiment was carried out using factorial design in randomized complete block with three replications. The first factor was different levels of phosphor fertilizer consist of 25%, 50%, 75% and 100% and Second factor was consist of do not use of mycorhiza fertilizer (control), 60 kg.ha, 120 kg.ha. Results variance analysis showed that grain yield, 1000 grain weight , Number of grain per row cob, grain on in ear row was significant. The most of grain yield and number of grain per row was in treatment of 50% phosphor fertilizer and 60kg.ha mycorhiza and least of treatment was obtain in control and 25% phosphor fertilizer. The most of number of grain per row was obtain in treatment of 120kg.ha mycorhiza and 50% phosphor fertilizer. Therefore it is recommended that for better efficiency and reduced consumption of phosphate fertilizer soil mineral elements, 50 percent of phosphate fertilizer recommendations and the application of 60 kg. ha mycorrhiza was used in planting corn.