Response of flower and corm yield of saffron (Crocus sativus L.) to nanobiologic fertilizer application in comparison to current cow manure and chemical fertilizer

For evaluation of response of flower and corm yield of saffron to nanobiologic fertilizer application methods in comparison to cow manure and chemical fertilizer an experiment was conducted in Shadmehr region as randomized complete block design with 10 treatments with four replication during two years (2014-2015 and 1015-2016). The treatments were 1. Corm inoculation with nanobiofertilizer (Bioumik product of Biozar company), 2. Corm inoculation+use in irrigation water, 3. Corm inoculation+ foliar application 4. Corm inoculation+ foliar application+use in irrigation water, 5. In irrigation water, 6. Foliar application 7. Use of chemical fertilizer (Urea, Ammonium phosphate and Potassium sulphate) 8. Use of cow manure 9. Use of chemical fertilizer +Use of cow manure and 10. Control. Studied traits were corm dry yield, flower dry yield, stigma dry and fresh yield and flower number. Based on result from third year the highest stigma dry yield (about 14 kg/ha) and flower number were achieved in Corm inoculation+ foliar application+use in irrigation water treatment (by 176 % increase in comparison to control) and the highest corm yield was seen in corm inoculation treatment (by 41 more than control). Results showed that the best method for corm improvement was corm inoculation with nanobiofertilizer and for flower improvement it is recommend to use of Corm inoculation+ foliar application+use in irrigation water.