E. Nabizadeh, H. Habibi and M.Hosainpour
Considering the importance of medicinal plants growth and biological application of fertilizers with sustainable agricultural production in order to eliminate or reduce chemical input to achieve desirable and sustainable quality, an experimental research based on randomized complete block design with 3 factors of chemical nitrogen (46% urea nitrogen) at 3 levels (Zero, 60 and 120 kg/ha), biological nitrogen (Azotobacter) with trade name Nitroxin at 3 levels (Zero, 3 and 6 lit/ha) with 3 plant densities (with fixed rows of 30 cm, with plant spacing's on the row 2, 4, 8 cm equivalent to 50, 25 and 12.5 plant/ m2) was carried in 2009. During the plant growth the necessary samplins were taken and the physiological indices of growth were measured. The results of analysis of variance showed that the effects of biological fertilizers (Azotobacter) Nitroxin of chemical (urea 46%) nitrogen with plant density in different treatments on plant height, leaf number, peduncle length, fertile umbellate/umbel, seed yield, essential oil content and essential oil yield were significant at p≤1 and 5%. The means showed that the greatest plant height and peduncle length belonged to the density of 50 plant/m2 (respectively with 48.2 and 5.3 cm). Highest number of leaves (the plant number to the number 19.1) was related to the interaction between biological fertilizer at 6 lit Nitroxin/ha and b density of 25 plant/ m2. The most seed yield and the highest oil were achieved (1286.4 and 179.1 kg/ha) by fertilizer treatment from interaction between biological Nitroxin (3lit/ha) and chemical nitrogen at 60 ha/kg with the density of 25 plant/ m2 respectively.
