EFFECT OF IRRIGATION INTERVALS AND BIOFERTILIZATION ON GROWTH, YIELD, OIL PRODUCTION AND CHEMICAL CONSTITUENTS OF ROSEMARY ( Rosmarinus officinalis,L.) PLANTS

Ahmed El-Leithy, Mohamed Salem, El Sayed El-Ghadban, Nabil Abd El- Ghani
2007 Journal of Productivity and Development  
This investigation was carried out aiming to study the effect of irrigation intervals ( every 7 , 11 and 15 days) and Biofertilization ( nitrobien and phosphorein each at 0 , 3 and 6 g /pot) on growth, yield, oil production and chemical composition of rosemary (Rosmarinus officinalis, L.), during two successive seasons of 2004 and 2005. The results showed that irrigation every 7 days gave the tallest plant, the highest oil percentage and oil yield/ plant in the first cut of both two seasons,
more » ... oth two seasons, the highest number of branches/ plant, fresh and dry weights/plant, total carbohydrates , N, P and K percentage in the first and second cut of both seasons and gave the highest linalool and P-cymene percentages in the essential oil. Whereas irrigation every 11 days gave the tallest plant, the highest oil percentage and oil yield/ plant in the second cut of both seasons and the highest α-pinene, β-pinene, limonene, 1,8 cineol and camphor percentages compared to irrigation every 15 days which gave the lowest values. Nitrobien and phosphorein at 3 and 6 gm/ pot significantly increased plant height, number of branches/ plant, fresh and dry weights/ plant and oil yield/ plant, and increased the main constituents of the essential oil (γ-Terpenene, 1,8 cineol, linalool , camphor, P-cymene, bornyl acetate and β caryophyllene percentages ), total carbohydrates, N, P and K contents in the first and second cut of both two seasons compared to unfertilized control. Interaction between irrigation intervals and bio-fertilization had a significant effect on vegetative growth characteristics and oil percentage and oil yield. Irrigation every 7 days and phosphorein at 6 g /pot gave the highest values of plant height ( in the first cut), number of branches /plant ( second cut), fresh and dry weights /plant ( in the first cut, oil yield /plant ( in the first cut), total carbohydrates, N and P contents in the first and second cut of both seasons. Whereas irrigation every 11 days and phosphorein application at 6 g /pot gave the highest dry weight/ plant, oil percentage and oil yield/ plant in the second cut of both two seasons. irrigation every 11 days and nitrobien application at 3 g /pot gave the highest β-pinene, 1,8 cineol, camphor and bornyl acetate percentages in the essential oil. Whereas irrigation every 11 646 EL-LEITHY ET AL days and phosphorein at 3 gm/pot gave the highest linalool and P-cymene percentages in the essential oil.
doi:10.21608/jpd.2007.45048 fatcat:dd5kuuaxefdzrbnbwvoypwseui