Impact of phosphate solubilizing fungi on the soil nutrient status and yield mungbean (Vigna radiate L) crop

Abstract

To enhance the availability of P and other macro and micro nutrients from the fertile calciorthent soil, phosphorus solublizing fungi (PSF) were isolated from the rhizoshere of the agricultural/ horticultural crops. The P solublizing potential of PSF was tested under in-vitro and in-vivo conditions. Penicillium citrinum isolate6 exhibited the maximum and constant P solublization potential throughout the incubation period in the presence of TCP (Tri-calcium phosphate) in Pikovskaya's medium. On the basis laboratory experiment, three fungi (Aspergillus niger isolate 2, Aspergillus niger isolate 3 and Penicilliun citrinum isolate 6) were selected for pot experiments, to test their efficacy on nutrient availability as well as on growth promotion of mungbean crop. Stimulatory effect of Aspergillus niger isolate 3, Aspergillus niger isolate 2 +Aspergillus niger isolate 3 and Aspergillus niger isolate 2+ Penicillium citrinum isolate 6 was recorded on N, P and K availability in soil, respectively. Combination of Aspergillus niger isolates with PSB significantly enhanced the Mn availability. While Aspergillus niger isolate 2 inoculation exhibited pronounced effect on Zn and Cu availability. Most of the biometric parameters were increased with the inoculation of fungal combination. The result indicates that the effective strains of Aspergillus and Penicillium can be used for nutrient availability and crop production in calcium rich soil.