Evaluation of the Effect of Biofertilizer, Zinc Sulfate and Nitrogen Fertilizer on Quantity and Qquality of Wheat Yield

In order to evaluate the effect of N-fixing biofertilizer, zinc sulfate, and nitrogen timing on yield and yield component and seed protein of wheat var. Pishtaz in parts of Kerman Province with temperate climate, an experiment with factorial RCB design and 3 replicates was conducted in the research farm of Shahid Bahonar University. Treatments were combinations of: (N) Nitrogen application timing (n1: 1/2 before sowing and 1/2 at tillering, n2: 1/3 at stem elongation and 2/3 at heading stage, and n3: 1/3 at stem elongation, heading, and milky stages, (ZN) Zink Sulphate (z1: 50 and z2: 0 kg/ha), and (A) Azotobacter (a1: 2 and a2: 0 kg/ha). Grain yield, number of spikes/m2, number of seeds/spike, 1000 kernel weight (TKW), and grain protein were measured. Based on the results of this study, the treatment n2z1a1 (n2:1/3in stem elongation and2/3 at heading, zn1:50 kg/ha, a1:2 kg/ha) produced the highest yield(7667 kg/ha), which had 46.74% higher yield in comparison with treatment n1z1a1(4083 kg/ha). The treatment n2z1a1 had the highest yield components including number of spikes/m2, number of seeds/spike, 1000 kernel weight (TKW) too (44.07 spikes/m2, 467 seeds/spike, and 44.61 gr, respectively) Seed protein contents as affected by the treatments in this study were significant. The highest (15%) and the least (9%) seed protein content were related to n3 a1(1/3 at stem elongation, heading, and milky stages and 2 kg/ha Azotobacter) and n1a0, respectively.