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Assessing the Effect of Nitrogen and Phosphorus Fertilizers on Yield of Thymus daenensis under Dry Farming Condition

Thymus daenensis is an aromatic medicinal plant endemic to Iran. Recent studies have showed that Thymus species have strong antibacterial, antifungal, antiviral, antiparasitic, spasmolytic and antioxidant activities. The objective of this study was assessing the effect of two factors of nitrogen and phosphorus on grow, yield and quality and quantity of effective material of Thymus Daenensis under dry farming condition. Consequently, this research was conducted from 2009 to 2010 in research station of cold water Hamband pasture. Two randomized block experiment design with three and four treatments and three replicates for nitrogen and phosphorus fertilizers were established, respectively. The designed treatments for phosphorus consisted of 0, 65 and 130 kg/ha Super phosphate Triple and designed treatments for nitrogen consisted of 0, 50, 100 and 150 kg/ha Urea. In this study, for assessing the effect of Nitrogen and Phosphorus on yield of Thymus Daenensis, some variables such as wet and dry weight, number of flower and toe in each brushwood, diameter of canopy, yield and percentage of essence and plant height was measured. The results indicated that third and fourth treatments of urea had similar effect on Thymus Daenensis and in similar condition third treatment was preferred. Also, third treatment of super phosphate triple was the best treatment. Finally, according to interaction effect of them, treatment of P N (100 kg/ha urea and 130kg/ha super phosphate triple) 33 was the best treatment and it was most effective for yield of Thymus Daenensis under dry farming condition.