Document Type : Research Paper
Authors
1 Member of Scientific of Qazvin Agricultural and natural resources Research Center
2 Research Institute of Forest and Ranglands, Tehran, Iran
Abstract
The effects of irrigation regimes on yield and agronomic characteristics of black cumin (Nigella sativa) were studied at the medicinal plants Research station of Qazvin Agricultural and natuoral resources research center during the years 1997 and 1998. A compele randomized block design(CRBD)with three replications was used. The treatments comprised four irrigation periods, 7, 14 , 21 interval days and without irrigation.The characteristits studied include of plant height, 1000 grains weight, number of capsule per plant, number of seeds per capsule, seed/capsule weight ratio and seed yield. Results showed that irrigation perriods in each of two years significantly affected effects plant height, number of capsule per plant, number of seed per plant and seed yield. The seven- day irrigation interval had the highest seed yield (1118kgha-1). There was no difference between treatments in respect of 1000 grains weight and grain/capsule weight ratio. However in water deficit and non- irrigation condition, plant showed resistance to the drought and produced crop with minimum soil moisture of the measured parameters, there was a significant correlation between yield, plant height, number of capsule per plant and number of seed per capsule.
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