Leaf chlorophyll content and grain protein and yield changes of three durum wheat (Triticum durum ) cultivars under nano fertilizer application

To evaluate the impact of nano fertilizers on leaf chlorophyll content, grain protein and yield of three durum wheat cultivars, a factorial experiment based on randomized complete block design was conducted with three replications in research farm of College of Agriculture and Natural Resources of Darab, Shiraz University, during 2015 growing season. Treatments were Three types of nano fertilizers including nano- composites bio organic (300 kg/ha), uremic (in three stages, 50 kg/ha in each stage) and biomik (dissolved in water, 2 kg/ha) and chemical fertilizer treatment including nitrogen (200 kg/ha) with phosphorus (200 kg/ha) and potassium (100 kg/ha) and three durum wheat cultivars including Behrang, Shabrang and Yavaros. Uremic fertilizer treatment had the highest seed nitrogen (2.9%), grain protein (18.5%) and grain yield (kg ha 7958.5). Also, among the cultivars, Yavaros had the highest grain nitrogen (2.5%), grain protein (16.2%) and grain yield (7160.2 kg/ha). Likewise, interaction effect of fertilizer and cultivar showed that uremic in Yavaros with 27% had the highest protein content. The chlorophyll content had the increasing trend up to dough development stage and the maximum amount was obtained in uremic (61.6 SPAD unit). The highest crop growth rate was also observed in uremic at dough development stage. Overall, results showed that application of uremic especially in Yavaros cultivar caused 19.5% increase in grain yield compared to chemical fertilizers.