Document Type : Research Paper


1 Assistant Professor of Irrigation Department, Islamic Azad University Branch of Qaemshahr, Qaemshahr, Iran

2 Graduate student, Deprtment of Agronomy, Faculty of Agriculture, Islamic Azad University of Qaemshahr Branch, Qaemshahr, Iran

3 Assistant Professor of Agriculture and Natural Resources Center of Mazadaran Province, Mazandaran, Iran

4 Assistant Professor of Agronomy Department, Islamic Azad University Branch of Qaemshahr, Qaemshahr, Iran

5 Mazandaran Region 2 Secretary of Education, Health, Mazandaran, Iran


To investigate the effects of deficit irrigation and different levels of nitrogen fertilizer on some
quantitative and qualitative properties of Melissa, a pot experiment was conducted for one year (2011) in
Mazandaran province. Experiment was carried out as a factorial based on randomized complete block
design with three replications. Irrigation treatments (25, 52 and 75 percent field capacity, FC) and
nitrogen fertilizer (0 and 2.5 percent ammonium nitrate) were allocated to main and sub-plots,
respectively. The results showed that the effect of different levels of deficit irrigation were significant on
quantitative and qualitative properties of Melissa. Fertilizer treatments were significant on dry weight,
leaf area, shoot number and fresh weight, percent citronellal, caryophyllene oxide percent, geranial and
neral percent. Interaction of treatments was significant only on leaf number, dry weight of shoot, fresh
weight of plant and geranial percent. Results showed that maximum plant height, leaf area, number of
stems, number of leaves and dry and fresh weight was obtained in 75 percent FC treatment. Percent of
citronellal, caryophyllene oxide, geranial and neral with 6.14 percent, 11.61 percent, 20.09 percent and
17.38 percent, respectively, had a maximum amounts in 75 percent FC treatment. Also, application of
nitrogen fertilizer caused 5.33 and 9.15 percent reduction of citronellal and caryophyllene oxide
respectively and increased geranial and neral percent by 17.64 and 15.56, respectively.


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