Effect of Drought Stress and Different Types of Organic Fertilizers on Yield of Cumin Components in Sistan Region

Cumin (Cuminum cyminum L.) is one of the most economical medicinal plants. Cumin is indigenous to Northern Egypt, Syria, the Mediterranean region, Iran and India; it grows easily throughout Iran. In order to study the effects of drought stress and different types of organic fertilizers on yield components of cumin this experiment was conducted in 2014 at the Agricultural Research Institute of University of Zabol, Iran in a complete randomized block in factorial design with three replications. Treatments included irrigation intervals (I1: two times irrigation, I2: three times irrigation and I3: four times irrigation that is irrigation at germination, seedling, flowering and seed filing stages) and fertilizers treatment (T1: without fertilizer application (Control), T2: 10 t/ha vermicompost, T3: 15 t/ha compost and T4: 30 t/ha animal manure. Characteristics such as seed yield, thousand –seed weight, number of seed per plant, number of seed per umbrella, number of umbelet per umbrella and number of umbrella per plant were evaluated. The results showed that these indices there were significant differences in all times irrigation treatments settlement number of umbelet per umbrella. Also the highest (458.29 kg/ha) and lowest (146.08 kg/ha) seed yield was produced under the traits 4 and 2 irrigations times. The application of 15 t/ha compost obtain highest number of umbrella per plant, number of umbelet per umbrella, number of seed per umbrella and number of seed per plant. The application of 30 t/ha animal manure produced highest seed yield (316.39 kg /ha) and thousand –seed weight (4.61) per plant.