Effect compost municipal yield, Drsdasans and some physiological characteristics of Nigella sativa (Nigella Sativa L.) under drought stress

In order to study the effects of water stress and municipal compost on qualitative and quantitative characteristics of Nigella sativa this experiment was conducted in 2012 at the Agricultural Research Station of University of Zabol, Iran in a complete randomized block in split plot design with three replications. Treatments included irrigation intervals: 1. Every seven days (Without stress) 2. Every nine days (mild stress) and 3. Every twelve days (severe stress) and municipal compost treatment include: without municipal compost application (control), 10, 20 and 30 tons per hectare. The results showed that the effect of water stress was significant on the biological and seed yield, proline and chlorophyll (a). Also biological yield, grain yield and chlorophyll (a) decreased in water stress condition. But proline content in leaves increased with increasing stress level. According to results highest biological yield, grain yield, essential oil percentage, proline, chlorophyll a, chlorophyll b, total chlorophyll and carotenoids were obtained In municipal compost application. The Interaction between water stress and municipal compost treatments on chlorophyll a, chlorophyll b, total chlorophyll and carotenoid were significant. According to results the best treatment at the increase on seed yield and essential oil content were application 30 tons per hectares of municipal compost in Zabol weather conditions.