اثر تیمارهای مختلف کودی بر خصوصیات مورفولوژیکی و میزان عملکرد گیاه به لیمو

Genus Lippia contains about 200 species and has a high medicinal and herbal value. It is the crop in terms of area and production in north of Iran because of economical value in the industries of food, medicine and aromatics. This genus is native to the tropical and subtropical regions of the country. To evaluate the effect of fertilizers on morphological traits and production contents in lemon plant, the experiment was conducted factorial in the base of complete randomized block design with four replications in the Gorgan city. Fertilizers treatment were four concentration of nitrogen (0, 50 and 100 kg/ha) and NPK (3: 1000). The results of the variance analysis showed significant differences in the number of lateral branches (P<0.05), but There weren’t any main differences on plant height, number of internodes, leaf area, fresh and dry weight, dry weight and essential oils percentage. Based on mean square comparison (LSD), 100 kg/ha nitrogen had better effect on lateral branches (11.6) than other treatments, also control (no fertilizer) and NPK treatments had lower branches (respectively 9.4 and 8.9). In general, N fertilizers had higher capability than NPK and between two nitrogen treatments, 50 kg/ha N fertilizer had a higher level between morphological traits and essential oil.