Effect of some micronutrients on Rosmarinus officinalis L

ABSTRACT

The effect of 50 mg/l levels of micronutrients [Fe, Zn and Mn], as single and combined treatments, on the growth, oil yield and nutrient content of Rosmarinus officinalis L., cultivated in sandy loam soil, were investigated. The data revealed that applications of micronutrients had a significant positive effect in most cases on plant height, the number of main branches, fresh and dry weights of herb. A combined treatment of the three micronutrients recorded the highest values in this respect. The highest oil content was obtained with Fe and Zn compound, while an increase in oil yield was due to an overall increase in herb dry weight, with the maximum value being achieved by a combined application of 3 elements. All treatments improved micronutrients content except for Mn application