Consider effect of zinc sulfate on some quality parameters and grain zinc concentration of rice (Oryza sativa L) var. Shiroudi

Foliar spray one of the best method to rice grain enrichment and Zn deficiency in daily diet resulted many problem and disorders. In order a experimental was carried out with purpose study effect of different amount zinc sulfate fertilizer on three important quality factor include amylase, temperature of gelatination, gel consistency and grain Zn concentration on Shiroudi cultivar in 2010 at tonekabon rice research station with 5 treatment zero, 2,4,6 and 8 per thousand spray zinc sulphate on randomized complete block design with four replications. Sprayed in three stages one month after transplanting seedling to the main field after flowering and milky stage were performed. The result showed zinc sulphate foliar spray significantly influence on AC, GT and Zn grain enrichment (p 0.05) and GC (p 0.01). Results of this experiment showed Zn can conversion glucose and sucrose to starch and affected on grain qualitative factors thus direct and indirect¬ affect on GC and GT.