Main content area

Assessment of urea coated with pomegranate fruit powder as N slow-release fertilizer in maize

Sabahi, Hossein, Jamian, Saba Siadat, Ghashghaee, Fahimeh
Journal of plant nutrition 2016 v.39 no.14 pp. 2092-2099
Punica granatum, cellulose, clay loam soils, coatings, corn, developmental stages, fertilizer rates, hemicellulose, lignin, nitrogen, phosphorus, polyphenols, pomegranates, slow-release fertilizers, urea, urea fertilizers
It has been hypothesized that plant polyphenol plus lignin, cellulose, and hemicelluloses can immobilize/remineralize inorganic fertilizers, such as urea, better than polyphenol alone. To test this hypothesis, urea was coated with pomegranate (Punica granatum L.) fruit powder (containing polyphenol+lignin+cellulose) at rates of 0%, 30%, 70%, and 100% (w/w) of fertilizer urea. Fertilizer nitrogen was applied at 100 and 200 mg kg ⁻¹ soil in a clay loam soil. This natural coating material, particularly at the rate of 100% (w/w), improved the distribution of mineral nitrogen (N) and available phosphorus (P) in soil during both early and advanced growth stages of maize and significantly increased total crop N and P uptake at both rates of fertilizer nitrogen compared to urea alone. The results suggest that urea coated with the powder of pomegranate fruit could potentially be an N slow-release fertilizer for use in better synchronizing crop N demand with soil N supply.