Evaluation of some bread wheat cultivars productivity and quality to foliar spray time by different zinc oxide nanoparticles sizes

Abstract EN

A field experiment was carried out during 2016/ 2017 and 2017/ 2018 seasons at the Agronomy Department Experimental Farm, Agriculture Faculty, Assiut University to study the effect of foliar spray time by different zinc oxide nanoparticles sizes on productivity and quality of some bread wheat cultivars.

The experiment was laid out in randomized complete block design (RCBD) using split plot in strips arrangement with three replications.

Zinc dioxide nanoparticles size (control, 20.7, 23.0 and 27.0 nm) were allocated horizontally, while, the three bread wheat cultivars (Sids-1, Sids-12 and Gemmeaza-11) were arranged vertically and zinc spray time (30, 45 and 60 days after planting) were assigned in sub plots.

The obtained results show that the zinc oxide nanoparticles sizes (ZnO NPs), bread wheat cultivars and zinc spray time variables had a significant influence on all studied traits in the two growing seasons except the effect of zinc application time on number of spikes m-2 and grain yield feddan-1 traits in the first season which was non- significant.

In addition, the most first order interactions had a significant effect on most studied traits in both seasons.

Furthermore, the second order interaction had a significant effect on all studied traits in both seasons.

The highest mean values of grain yield feddan-1 (28.67 and 28.50 ardab feddan-1 in the first and second seasons, respectively) were obtained from planting Gemmeza-11 cultivar and sprayed it by minimum size (20.7 nm) of ZnO NPs after 60 days from planting.

Moreover, sowing Sids-12 cultivar and sprayed it by minimum ZnO NPs size (20.7 nm) at 30 days after planting recorded the maximum mean value of grains dry gluten content (13.72 %) in the first seasons, while, the highest mean value of grains dry gluten content (14.37 %) in the second seasons was achieved from planting Sids-1 cultivar and sprayed it by minimum ZnO NPs size (20.7 nm) at 60 days after planting.