Effect of T. harzianum and G. mosseae Biological Inoculation and Phosphate Rocks on the Availability of NPK in the Rhizosphere of Barley Crop (Hordium Valgari L.)

Abstract

When it comes to increasing crop yields, biological fertilizers are crucial. So, researchers looked into how different concentrations of phosphate rock and T. harzianum and G. mosseae fungal fertilizers affected NPK availability in the rhizosphere of a barley crop. In the fall of 2021, farmers in the Al-Qadisiyah Governorate tested out a new barley variety they’d come up with, calling it “Samir 1,” on clay loamy soil. A randomized complete block design (RCBD) with three replicates was used to create the factorial experiment. The experiment used four different doses of phosphate rock (P0, P1, P2, and P3) at concentrations of (0,1000,1500, and 2000) t/ha-1, as well as two doses of T. harzianum inoculum (T0, control; T1, fungal inoculation); and two doses of G. mosseae inoculum (G0, control; G1, fungal inoculation). According to the findings, nitrogen, phosphate, and potassium (NPK) availability in the soil were significantly increased by 41.32, 16.54, and 225.43 mg/kg/soil-1 in the interaction treatment compared to the control.