Document Type : Research Paper

Authors

• B. Abbaszadeh ¹
• E. Sharifi Ashoorabadi ²
• M.R. Ardakani ³
• F. Paknejad ³

¹ M.Sc. Agriculture Student of Azad University, Branch of Karaj, and Research Institute of Forests and Rangelands,

² -Research Institute of Forests and Rangelands, Tehran.

³ Academic members of Azad University, Branch of Karaj

Abstract

In order to investigation the effect of different levels of nitrogen fertilizer on yield of Melissa officinalis L., an experiment was conducted under greenhouse condition in Alborz Research Station in Karaj/Iran in 2003/2004. The research carried out with 6 levels of foliar application of nitrogen using of completely randomized design with three replications. The treatments included 0, 3%, 4.5%, 6%, 7.5 % and 9% nitrogen fertilizer and applied in 3 stages on plant.
Results showed that effect of different levels of foliar application on yield was significant. The level of 4.5% had a higher performance (85.8 g/ shoot per plant) to others. Reduction of yield at levels of 7.5% and 9.0% was explained by Micherlich law.
Foliar application caused to increase of yield and decreasing of agroecosystem pollution. Foliar application was a suitable approach in sustainable agriculture.

Keywords

• Melissa officinalis
• spray
• Nitrogen fertilizer
• yield