Title: Effect of fertigation on amount of protein, yield and yield components of corn
Abstract: To study effect of furrow fertigation on amount of protein, yield and yield components of corn, a field experiment was conducted in Seed and Plant Improvement Institute of Karaj, Iran in the summer of 2012. The study design was a factorial design based on randomized complete block with 4 replication. First factor (N) includes three fertilizer levels of 60%, 80% and 100% recommended fertilizer value and the second factor (T) includes two split application fertilizer levels (four and three split application). The nitrogen required for the plant is provided by urea fertilizer and used along with water irrigation. Finally, these 6 treatments were compared with traditional fertilizer application method (Control). The results showed that treatment of 80% and 100% recommended fertilizer has not a significant difference with amount of protein. Therefore, 80% recommended fertilizer in four split application is recommended for increase of protein. The results in terms of yield of corn showed that 60% fertilizer in four split application has the most yield. In addition, the results showed that fertigation comparing method of surface fertilizer distribution increases yield and yield components. Therefore, fertigation is recommended as fertilizer management choice comparing traditional method of fertilizer distribution.