Effect of bio fertilizers and foliar applicationon of Nano zinc oxide on clorophyll content, grain filling period and yield of wheat (Triticum aestivum L.) under water limitation

In order to study the effect of bio fertilizers and foliar application of nano zinc oxide on cholorophyll content, grain filling period and grain yield of wheat under water limitation, a factorial experiment was conducted based on randomized complete block design with three replications in 2014. The experimental factors were included: water limitation in three levels [full irrigation as control, irrigation withholding at 50% of heading booting stages], seed inoculation with PGPR: non-inoculation, inoculation with Azotobacter, Azosperilium, Pseudomonasputida) and foliar application of nano zinc oxide: non-foliar application and foliar application of nano iron oxide, nano zinc oxide and nano zinc oxide nano iron oxide). Results showed that maximum of grain weight (0.0689 g), rate grain filling (0.0019 g.day-1), grain filling period (52.63 days), effective grain filling period (34.78 days) and grain yield of per plant (1.21 g per plant) were obtained at application of Azotobacter, nano oxide of Zn and full irrigation. Minimum of traits (0.0031 g, 0.0017 g.day-1, 45.46 days, 25.39 days and 0.18 g.plant-1 respectively) were obtained in non-inoculation, non-foliar application of nano oxide and irrigation to %50 of booting stage. Based on the results, it seems that bio fertilizers and nano oxide of Zn application can be recommended for profitable wheat production under water limitation condition.