Effect of Incorporation Nutrient System on Nutrient Uptake and Yield of Forage Maize under Water Deficit Condition

This study investigated the effect of incorporation of arbuscular mycorrhiza (AM) fungus and Pseudomonas florescence bacterium as biological fertilizer and consumption of phosphorus from triple superphosphate and rock phosphate resources as chemical fertilizer on uptake of nutrients and yield of forage maize (Zea mays L.) under water deficit conditions. This research was conducted split-split plots in randomized complete block design with three replications. Treatments consisted of irrigation، (irrigation after of 60 and 120 mm evaporation from class A evaporation pan) in main plots، combined of AM fungus and Pseudomonas florescence bacterium (co-application of AM fungus and Pseudomonas florescence bacterium، application Pseudomonas florescence bacterium، application AM fungus and non-application AM fungus and Pseudomonas florescence bacterium) in sub plots and phosphate chemical fertilizer (without consumption of phosphate chemical fertilizer (control)، consumption 50% triple superphosphate fertilizer needed based on soil-test results and consumption rock phosphate) in sub sub plots. In this study some characteristics such as Concentrations of N، K، P، Fe، Zn، Mn and Cu، dry matter yield and root colonization percent were assessed. Water deficit stress and co-application of AM fungus and Pseudomonas florescence bacterium increased concentrations of N، Zn، Mn and Cu by 7. 75%، 12. 8%، 1. 41% and 27. 76% than normal irrigation and non-application of phosphate solubilizing microorganisms however، this increase only for N، Zn and Cu were significant. Also، the results of interaction between phosphate chemical fertilizer and phosphate solubilizing microorganisms showed that efficiency of super phosphate triple fertilizer with phosphate solubilizing microorganisms on investigated traits was more than rock phosphate