اثر تاريخ كاشت و مقادير مختلف كود نيتروژن بر عملكرد گل و اجزاي آن در بابونه آلماني (Matricaria recutita)

Effect of different planting time and nitrogen fertilizer rates on flower yield and its components in German chamomile (Matricaria recutita)

German chamomile a frequently used phytopharmaceutical, is used as a component of tea-mixes as well as a valuable ingredient of many galenric preparations. In order to investigate the effect of different planting date and nitrogen fertilizer rates on flower yield and its components in German chamomile (Matricarw recutita), an experiment was conducted in split plot arrangement -using a randomized complete block design with three replications and two factors, planting dates were March 5, March 20 and April 4, Nitrogen fertilizer rates were 75, 150 and 225 kg/ha of urea. Number of flower/plant, fresh and dry weight of flower per plant, days to budding, Jays to 50 and 100% of flowering, number of lateral branches, plant height. stem diameter, and number of tiller per plant were measured. Mean comparison showed that the highest and lowest number of flowers, fresh and dry weight of flower per plant, days to budding, days to 50 and 100% flowering and of essential oil content were related to planting date of March 5 and April 4, respectively. Results also indicated that by increasing nitrogen fertilizer. number of flower, fresh and dry weight of flower per plant. plant height, number of tiller, and essential oil content were increased. The highest number of flowers, fresh and dry weight of flower per plant belonged to planting date of March 5 and 225 kg/ha urea. Regression analysis showed that number of flowers per plant, days to budding and plant height were the main traits contributed to flower yield per plant.