بررسي تاثير مقادير مختلق ازت و فسفر بر عملكرد و ميزان اسانس دانه گياه انيسون

Study of the effects of different rates of N and P on grain yield and essential oil of anise (Pimpinella anisum)

In order to study the effect of different rate of Nitrogen (N) and Phosphorus (P) on grain yield and essential oil rate of anise an experiment was conducted in pots with 12 treatments, each with different amounts of Nitrogen on urea form in three levels: No (without Nitrogen), N30 (30 Kilogram ofN in hectar that equals 0.11 grams of N in the pot ) N60 (60 kilograms of N in hectar that equals 0.23 of N in the pot) and some phosphorus in the form of super phosphate trip! in four levels: Po (without phosphorus), P30 (30 kgs of P in hectar that equals 0.11 grams of P in the pot), P60 (60kgs of P in hectar that equals 0.23 grams of P in the pot), P90 (90 kgs of P in hectar that equals 0.35 grams of P in the pot) using factorial experiment with completely randomized design with five replications. The result of the experiment indicates that there is a significant difference at 1% statistical level between difference levels of N, P and their interaction with anise grain yield. Also the highest yield is concerned with N60 and P60 treatments. Since there is no statistically significant difference between P60 and P90 treatments, concerning the mean comparison, it can be concluded that the highest yield of anise grain 60kgs of N and P in hectar. The essential, oil obtained, using water destillation method was also measured. The result indicates that adding azote and phosphorus fertilizers has no effect on the essintial oil content obtained and there is no statistically singifcant difference between the means of different treatments. Regarding the essentail oil yield (amount of essential oil in area unit), the result indicates a significant difference at 1% statistical level between different treatmeants. The highest amount of essential oil obtained, is concerned with N60 and P60 treatments. The comparison of the means of different treatmets also showed that there is no statistically significant difference bettween p6o and P90 treatments.