Vol. 12, Issue 5 (2023)

Author(s):
Sathisha GS, Narayana S Mavarkar, Dinesh Kumar M, Sridhara CJ, Ganapathi and Nandish MS

Abstract:
A field experiment was conducted at Agricultural and Horticultural research station, Bhavikere, Karnataka in red sandy clay loam soil during summer-2020 to study the influence of drip fertigation schedule and fertilizer sources on water productivity and microbial population dynamics in direct seeded rice system. Research was carried out in split plot design consisting of three levels of drip fertigation schedule in the main plot and four different combinations of fertilizer sources in sub plot, it was replicated thrice. The experimental results revealed that, higher water productivity of 104.04 kg ha-cm^-1 recorded in drip fertigation scheduling once in five days and among the sources of fertilizer used 100% water soluble fertilizer recorded higher water productivity of 106.93 kg ha-cm^-1. Whereas, with respect to the microbial population studied, fertigation scheduling once in five days recorded higher number of bacterial, fungal and actinomycetes population at harvest in soil (56.91cfu×10⁵/g of soil, 27.90 cfu×10⁴/g of soil and 13.89 cfu×10³/g of soil, respectively) and among the sources of fertilizer used 100% water soluble fertilizer used plots recorded higher number of bacterial, fungal and actinomycetes population at harvest in soil (58.67cfu×10⁵/g of soil, 28.60 cfu×10⁴/g of soil and 13.93cfu×10³/g of soil, respectively).