Assessing the effect of irrigation management on economic yield and production of active ingredients of saffron medicinal plant (Crocus sativus L.) by application of organic fertilizer and nanocomposite superabsorbent polymers

In order to find and recommend a method for improving vegetative and reproductive traits and economic yield of saffron using organic compounds of soil amendment, a split plot experiment including three irrigation intervals of 30, 50 and 70 days as main plots and three factors of vermicompost, Terracottem and Bolourab A, as well as control, as sub plots was carried out for three years (2014-2017) at Saffron Research Institute, Torbat-e-Heydarieh University. The results showed that the effects of treatments on all quantitative and qualitative traits, were significant (p