Growth and Yield of Niglla sativa L. Plant Influenced by Sowing Date and Irrigation Treatments

摘要

A field experiment was established at the Experimental Farm of the Faculty of Environmental Agriculture Science at El-Arish, Suez Canal University, Egypt during two successive seasons of 2005/06 and 2007/08 to study the effect of irrigation schedules along (irrigation every 2, 4 and 6 days before and after flowering) with three sowing dates (10, 30th October and 10th November) on growth and yield of Black cumin. All growth and yield parameters were adversely affected by increasing the irrigation intervals. The maximum values were obtained by irrigation every 2 days throughout the growing season and the minimum ones by irrigation every 6 days before flowering stage. Early sowing date increased significantly the growth and yield parameters, whereas late sowing date decreased them. The interaction between sowing date and different irrigation intervals, it could be noticed that growth and yield parameters considerably improved as a result of first sowing date with irrigation interval at 2-days in the 1st and 2nd seasons, against the lowest values resulted from the late sowing date with irrigated plants every 6-days. So, it could be recommended that early sowing date and irrigation every 2-days resulted in the best growth parameters and oil yield of Nigella sativa L. plant.