Effect of mycorrhiza fungi on the quantitative and qualitative traits of cowpea (vigna unguiculata L.) in different irrigation intervals

In order to effect of mycorrhiza fungi on the quantitative and qualitative traits of cowpea in different irrigation intervals, this research was carried out in 2017 in Khorramshahr as split plot based on randomized complete block design with four replications. The treatments consisted of different irrigation intervals at four levels of 55, 80, 105 and 130 mm evaporation from class A evaporation pan in main plots and mycorrhiza fungi in two levels including non-application of mycorrhiza (control) and mycorrhizal application in sub plots. The results showed that the effects of irrigation intervals and mycorrhiza fungi on seed yield, number of seeds per pod, 1000 grain weight and protein yield were significant. The highest grain yield to 80 mm pan evaporation treatment (with an average 233.3 g/m2), and the lowest yield (with an average 168.7 g/m2) to 130 mm pan evaporation treatment was given. The results showed that using mycorrhizal fungus, grain yield and protein yield increased. The interaction of irrigation intervals and mycorrhiza had a significant effect on grain yield and the highest grain yield (with an average of 240.97 g/m2) was obtained from 80 mm evaporation pan treatment from and the application of mycorrhiza. Therefore, in order to achieve the maximum quantitative and qualitative yield, planting of cowpea plant with irrigation intervals 80 mm evaporation from pan and application of mycorrhiza in areas where plants with drought stress are recommended.