Study of the effect of foliar spray application of different forms of Zinc on quality characteristics of pomegranate fruit (Punica granatum cv. malas tabrizi)

In this investigation¡ the effect of foliar spray application of different forms of Zinc in different concentrations on some quality characteristics of pomegranate fruit¡ were studied. This spray application was carried out in May and July of 2016. This study was conducted based on a randomized complete block design with seven treatments and three replications per treatment. ZnSO4 fertilizer and nano-Zn chelate fertilizer were applied in 500¡ 1000 and 1500 mgl-1 concectrations. Application of 500 mgl-1 nano-Zn chelate significantly increased fruit grain percentage¡ fruit peel percentage¡ dry weight of 100 grains¡ dry weight of peel¡ relative water content of 100 grains percentage and relative water content of peel. Furthermore¡ 1500 mgl-1 ZnSo4 treatment had a toxic effect on these characteristics and significantly decreased all of them. According to the results¡ nano- Zn chelate spray application is better than ZnSo4 spray application and 500 mgl-1 concentration of this fertilizer is suggested in spray applications.