عنوان مقاله [English]
In order to evaluation the response of saffron to different manure, biological and chemical fertilizers, an experiment was carried out as split-plot based on randomized complete blocks design with three replications in Research Farm of Gonabad Agriculture Jihad during 2015-2016 and 2016-2017 growing seasons. Main factor was 60 t/ha manure, and no manure application, and sub factor concluded of control (no fertilizer use), nitroxin (5 L/ha), biophosphorus (3 L/ha), biosulphur (5 kg/ha), humic acid (10 kg/ha), and chemical fertilizer (150, 100, and 100 kg/ha urea, triple superphosphate, and potassium sulfate). Experiment results indicated that interaction effect of manure and biological and chemical fertilizers on fresh flower yield, fresh and dry stigma yield was significant. The highest fresh flower yield (181 kg/ha) achieved by biophosphorus along with application of 60 t/ha manure. Fresh stigma yield in chemical fertilizer under manure application treatment showed the highest increase (mean yield of 10405 g/ha). While, dry stigma yield due to biophosphorus application obtained the highest value (5351 g/ha). The effect of manure on corm traits was significant. Corm number per unit area and corm yield showed 19% increase in second year due to manure application than control. Among biological and chemical fertilizer treatments, the highest value of corm number (440 corm/m2) and corm yield (4401 kg/m2) was obtained due to biophosphorus application. Based on obtained results, combined application of recommend manure with biological fertilizers especially biophosphorus under climatic and edaphic conditions similar to this experiment area is recommended.