Evaluating the Effects of Amounts and Different Times of Nitrogen Consumption on Quantitative and Qualitative Traits in Sesame (Sesamum indicum L.) in Behbehan Province

In order to evaluate the effects of different amounts and dates of Nitrogen consumption on the quality and quantity of yield this experiment was carried out in a factorial experiment based on randomized complete block design with three replications in Behbehan.The first factor was Nitrogen five levels of (0, 25, 50, 75 and 100 kg ha) with an Urea source the and second factor was two levels of Nitrogen consumption on different dates.First treatment fertilizer was used in two stages (pre cultivation pre flowering), and the second treatment in three stages (pre cultivation pre flowering pre week before capsule) at equal consumption. The results showed that the best treatment in seed yield and seed oil yield was related to the consumption of 75 kg of pure Nitrogen in the two phases. In some traits such as plant height and number of sub- branch, it was observed that with the increase of Nitrogen quantity a significant increase in these two traits was obtained. The study showed, the higher use of Nitrogen increased the percentage of pollution of sesame plant death and filody. As a result,the most part of pollution was obtained at treatment of 100 kg ha-1 of pure Nitrogen. Since the best choice for fertilizer treatment is a treatment that in addition to a high operation has a high percentage of oil and oil yield, the above results and the fact that the best treatment, is a treatment that obtains best results with the lowest fertilizer consumption. In this research, the best treatment for Nitrogen use regarding traits under evaluation, the treatment that used 75 kg ha Nitrogen in two stages (pre-cultivation pre-flowering) was introduced.