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.)
Salah Mahdi Laibi* and Jawad Abdul Kadhim Kamal
College of Agriculture, University of Al-Qadisiyah, Iraq
*Corresponding Author: Salah Mahdi Laibi, College of Agriculture, University of Al-Qadisiyah, Iraq.
Published: January 31, 2023
Abstract
Biological fertilizers are of great importance in further improving agricultural production. Therefore, the effect of fungal fertilizers with isolates of T. harzianum and G. mosseae and levels of phosphate rock on NPK availability in the rhizosphere of the barley crop was studied. A field trial was conducted on clay loamy soil to produce a variety of barley crops named (Samir 1) during the autumn agricultural season in 2021 in the Al-Qadisiyah Governorate. The factorial experiment was designed according to a Randomized Complete Block Design (RCBD) with three replications. The factors of the experiment included two levels of T. harzianum inoculum (T0, control and T1, fungal inoculation), two levels of G. mosseae inoculum (G0, control and G1 fungal inoculation), and four levels of phosphate rock (P0, P1, P2, and P3) with an amount (0,1000,1500, and 2000) t/ha-1. The results present that the interaction treatment (G. mosseae + T. harzianum and phosphate rock of 1000 t/ha-1) resulted in a significant increase in the availability of nitrogen, phosphate, and potassium (NPK) in the soil 41.32, 16.54, and 225.43 mg/kg/soil-1, respectively, compared to the control.
Keywords: T. harzianum; G. mosseae; Phosphate rocks; Barley plant; NPK