The Effect of Urea on the Concentration of Fe, Mn, Zn and Cu in Rice Plant at Two Different Soils

This research aims to investigate the effect of urea level on concentration of Fe, Mn, Zn and Cu in shoot and root of the Hashemi rice (Oryza sativa L.) in two soils with clay loam and loamy sand texture. This investigation is factorial experiment in a completely randomized design with four replicates and include urea in three levels (0, 100, and 200 mg N/kg), two types of soil and in greenhouse condition. Results of the study show the type of soil has a meaningful effect on concentration of Fe and Mn in root and shoot, Cu on shoot and Zn on root of the rice. The high concentration of Zn and Mn in shoot, and Fe and Mn in root is shown in loamy sand soil and high concentration of Fe in shoot and Cu in root is represented in clay loam soils. Interaction of type of soil and urea show that concentration of Mn in root decreases in 100 mg N/kg on clay loam soil, while the concentration of Cu in root is increased. Concentration of Cu in shoot decreases in 100 mg N/kg on loamy sand soils, while using urea and increasing its level in clay loam soil increases its concentration. Concentration of Zn in root is also meaningfully increased using 100 mg N/kg in loamy sand soils.