The reaction of dry matter yield in Lavender (Lavandula officinalis L.) to different treatments of Nitrogen

Nitrogen fertilizers play a significant role in enhancing crop yield, shoot development, and metabolites production by increasing photosynthesis levels. The present study explores the effect of nitrogen on dry matter yield of a medicinal plant, i.e. lavender (Lavandula officinalis L.). For so doing, an experiment was carried out with four replications, following a randomized complete block design, in the research field of Islamic Azad University, Shahr-e Rey. Different traits such as dry and wet weights of shoot, dry weights of leaf and stem, plant height, stem diameter, and the number of branches were treated using six different treatments including: control, 60, 90, 120, 150, and 180 kg nitrogen per hectare as urea resource. The results indicated that different amounts of nitrogen significantly affected all of the traits. An increase in the amount of nitrogen per hectare resulted in an increase in the traits under study in a way that two of the treatments, i.e. 150 and 180 kg nitrogen per hectare, resulted in the highest dry and wet weights in shoot and dry weights of leaf and stem.