The effect of nitrogen levels and sources on yield, yield components and oil content of sesame in Jiroft area
2010
Ghafarinegad, Seyed Ali | Aaein, Ahmad | Jalali, Amir | Niknafs, Majid
In order to determine the best source and level of nitrogen fertilizers on economic production of sesame (Var JL-13) in Jiroft area an experiment was conducted as factorial as Randomized Complete Block Design with 4 N levels (0, 40, 80 and 120 kgNha-1), 3 N sources (Urea, Ammonium nitrate, and Ammonium sulfate) in 3 Replications from 2006 July for 2 years. One third of N fertilizer applied pre culture one third used when plants height were 20 cm and one third at capsule emergence stage as band application. Other nutrients used uniformly in each treatment as soil test. Plant height, first capsule height, stem diameter, number of productive branches, Capsule per plant, and number of seeds per capsule measured. After harvest yield (kgha-1) and 1000 seed weight measured. Samples were taken for oil percent and protein content. Results showed that nitrogen sources had not significant effect on yield and yield components. The effect of nitrogen levels on yield was significant. Increasing N levels resulted to yield increase. The highest yield obtained from 80 kg N ha-1. Interaction of N level *N source on yield were significant. When N source was ammonium sulfate or nitrate the highest yield obtained with 80 kg N ha-1 and when urea was the N source the highest yield obtained with 120 kg N ha-1 . Increasing nitrogen level significantly decreased oil content and increased protein content of sesame seeds.
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