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 irrigation levels and varieties on water productivity and microbial population dynamics of direct seeded rice. Research was carried out in split plot design consisting of four levels of irrigation in the main plot and four different varieties in sub plot, it was replicated thrice. The experimental results revealed that, higher water productivity of 80.61 kg ha-cm^-1 recorded in scheduling of irrigation at 0.75 IW/CPE ratio and among the varieties tested MAS 946-1 recorded higher water productivity of 77.59 kg ha-cm^-1. Whereas, with respect to the microbial population studied, scheduling of irrigation at 1.50 IW/CPE ratio recorded higher number of bacterial, fungal and actinomycetes population at harvest in soil (53.09 cfu×10⁵/g of soil, 23.73 cfu×10⁴/g of soil and 10.83 cfu×10³/g of soil, respectively) and among the varieties studied higher number of bacterial, fungal and actinomycetes population at harvest in soil (52.74 cfu×10⁵/g of soil, 23.93 cfu×10⁴/g of soil and 10.85 cfu×10³/g of soil, respectively) recorded in MAS 946-1 grown plots.