Effects of Mycorrhizal Fungi and Biofertilizer on Yield and Yield Components of Red Bean (Phaseolus vulgaris L.) in Drought Stress Conditions

In order to study the effects of mycorrhizal fungi and biofertilizers on yield and yield components of red bean under water stress conditions, this experiment was conducted as split plots based on randomized complete block design with three replications at Agriculture Research Station of Yasouj University. Irrigation as the main plot at three levels, without irrigation cut, irrigation cut off at the beginning of flowering to the start of podding, and irrigation cut off at the beginning of the podding to the maturity, and biological fertilizers as the sub plot at four levels as control, use of Phosphate Barvar2, use of Mycorrhiza and the combined use of them were used. The highest and lowest leaf area index, seed number per pod and biological yield were obtained in treatments without irrigation cutting and irrigation cutting at flowering to podding stage, respectively. The highest number of seeds per pod (3.91), leaf area index (3.29) and biological yield (6973.99 kg.ha-1) were observed in the combined application of mycorrhiza and Phosphate Barvar2 and the lowest, respectively as 3.06, 2.71 and 572.77 kg.ha-1 was achieved in the control. Mean comparison interaction of irrigation and biofertilizer on grain yield showed that in all three levels of irrigation, the highest and lowest of grain yield related to the combined application of mycorrhiza and Phosphate Barvar 2 and control (non biological fertilizer) respectively. The results showed that the use of mycorrhizal fungi and phosphate solubilizing bacterium reduced the effects of water stress by irrigation cuttings in red beans.