Effect of Two Organic Manures, Zinc and Boron on Yield, Yield Components and Grain Chemical Composition in Millet

A field study was conducted in Qaen region using complete randomized blocks with three replications to study the effect of organic manure, zinc and boron on yield and yield components of millet and grain chemical composition. The treatments included factorial arrangement of municipal solid waste compost and cow manure (each at 25 ton ha-1), Zn (0, 50 kg ha-1) and B (0, 10 kg ha-1) by using their respective: ZnSO4 and H3BO3 salts. Results showed that the effect of Zn and B increased total plant biomass, N and K concentrations in grain. Interaction effects of cow manure and Zn, increased grain yield to 239.7 %, total plant biomass 157 % compared to their controls. Organic manure application significantly increased grain yield, total plant biomass, spike length and 1000 grain weight compared to their controls. Interaction effects of B and cow manure increased total plant biomass, P, K and Cu concentrations in grain by 150.6, 102.8, 75 and 118.6 percent, respectively compared to control. So according to the results, Zn, B and organic manures application had significant impacts in improving yield, yield components and seed quality of millet, but more research are needed with respect to amounts of Zn and B and their proper methods of applications.