Effect of spraying B, Mo and Zn on alfalfa seed yield

A field experiment was conducted to determine the effect of B, Mo and Zn on alfalfa seed yield and its components by spraying these elements at the flowering stage. The seed components consisted of plant height, thousand seed weight, florets per reproductive branches, pods per inflorescence, seed number per pod yield. The results of this study showed that addition of B, Mo and Zn showed the significant effect on alfalfa seed yields and its components. Combination of 0.9% Na2B4O710H2O, 0.04% (NH4)6Mo7O244H2O and 0.6% ZnSO47H2O showed a highest seed yield, and seed yield increased by 6.89%, 26.51% and 13.8% when compared to control, respectively. Different combination of Na2B4O710H2O, (NH4)6Mo7O244H2O and ZnSO47H2O affected the number of inflorescence per reproductive branches, pod number per inflorescence and seed number per pod.