Effect of Nitrogen and Phosphorous Biofertilizers on Quantitative and Qualitative Traits of Borage (Borago officinalis L.) under Water Deficit Stress

In order to study the effect of biofertilizer)Nitroxin and Biophosohate (on quantitative and qualitative traits of Borago officinalis, a field experiment was conducted at Kermanshah, Iran, in year 2011. Water deficit stress set as main factor with four levels, D1 (interrupt irrigation in vegetative phase), D2 (interrupt irrigation in reproductive phase), D3 (interrupt irrigation in vegetative phase + productive phase) and D4 (without water deficit stress). Water deficit stress was applied by interrupting irrigation once. Fertilizer treatments set as sub factor with three levels, F1 (100% chemical fertilizer), F2 (50% of chemical fertilizer + biofertilizer), F3 (25% of chemical fertilizer + biofertilizer). Result indicated that these treatments had significant effects on plant height, number of branches, yield of florescence, essential oil yield and mucilage yield. The highest value of the plant criteria was related to without stress and by using 50% of chemical fertilizer + biofertilizer. And the lowest value was achieved from stress in vegetative + reproductive stages by using 25% of chemical fertilizer + biofertilizers. 50% of chemical fertilizer + biofertilizer in vegetative stage 14% and in reproductive¬ stage 19% increase the plant height in compare to use of 100% chemical fertilizer. The highest essntial oil yield (7/18) and Musilage yield (74/94) was achieved by using 50% of chemical fertilizer + biofertilizers without stress situation.