Effect of different application methods and rates of salicylic acid on yield and yield components of cumin (Cuminum cyminum L.)

In order to evaluate different application methods and rates effect of salicylic acid (SA) on yield and yield components of cumin (Cuminum cyminum L.), this study was done as a split plot based on randomized complete block design with four replication in Research Field of Agricultural collage, Karaj Branch, Islamic Azad University in 2011. Two application methods of salicylic acid (Spraying and mixed with irrigation water) were as main plot and three concentration of SA (0, 0.1, 0.7 and 1.5 Mm) were as sub plot. Measured traits comprised number of seed per umbel, number of umbel per plant, number of seed per plant, seed yield and weight of thousands seed. Result showed that spraying method of SA has better effect than other one. Some traits such as number of seed per umbel and number of seed per plant (P> 0/05) and seed yield and thousands seeds weight (P> 0/01) had significant effect in sprayed plant with SA. But number of umbel per plant has no different effect on application methods of SA. Also some traits such as number of seed per umbel and number of seed per plant in sprayed plant with SA increased (P> 0/05) in 0.7 Mm concentration. Wherever maximum seed yield was achieved in sprayed plant with 0.7 Mm concentration in amount of 1480.63 kg/ha and minimum seed yield was achieved in irrigated plant with 0.7 Mm concentration in amount of 1100.16 kg/ha.