INFLUENCE OF NITROGEN FERTILIZATION AND ACTIVE DRY YEAST ON LAVANDER (Lavandula officinalis) PLANTS PRODUCTIVITY UNDER NORTH SINAI CONDITIONS

Abstract

The present work aimed to improve lavender plants (Lavandula officinalis L.) and volatile oil by using N fertilization and dry yeast in field experiment during the two seasons of 2013/2014 and 2014/2015. Four rates of nitrogen fertilizer were used in this work; 0, 50, 100 and 150 kg/fed as urea (46 %N) combined with four dry yeast concentrations (0%, 10%, 20% and 30%). The results were recorded that vegetative growth (plant height, herb fresh and dry weights/plant), root system (fresh and dry weights of root/plant), oil yield (oil yield/plant and per fen) and some chemical constituents (N, P and K percentages). Generally the highest values of vegetative growth and oil content per plant and per fed were obtained by using urea at level (150 kg.fed -1 ) combined with spraying plants' leaves by 30% dry yeast as foliar spry under North Sinai conditions.

Improving growth, yield and essential oil of lavander Lavandula Officinalis L. by using compost and biofertilizer application in clay soil

“…Also, (El-Naggar et al, 2015) on sweet basil said that, organic and biofertilization are very important methods to improve plant growth with their proper nutritional requirement without having undesirable impacts on the environment. (Mandoor et al, 2017) on lavender plants mentioned that, organic matter and dry yeast improved plant growth characters and the oil yield/ fed. (El-Tarawy et al, 2017) on caraway mentioned that, compost in combinations with active dry yeast significantly enhanced plant growth due to, active dry yeast producing various enzymes, hormones, amino acids and vit.c.…”

“…In addition, active dry yeast significantly increased lavender oil yield/ fed. compared to control according to (Sakr et al, 2015, andMandoor et al, 2017)…”