The improper usage of rice straw damages the ecosystem and injects greenhouse gases into the atmosphere. The purpose of this study was to increase water productivity by recycling this enormous quantity of agricultural biomass using microbial inoculants to break it down. The present study consists of three irrigation and seven nutrient management treatments viz., Continuous flooding (CON), Flooding with early and mid season drying (EMD), Irrigation as per SRI system (SRI) were assigned to main plot. Whereas, Nutrient management (NM) viz., Rice raw straw incorporation + 100% RDF (SF1), Rice raw straw incorporation + 75% RDF + 2% Urea foliar spray (twice) (SF2), Rice raw straw incorporation with Pusa Decomposer Capsules + 100% RDF (SF1D), Rice raw straw incorporation with Pusa Decomposer Capsules + 75% RDF + 2% Urea foliar spray (twice) (SF2D), Rice raw straw incorporation with TNAU Biomineralizer + 100% RDF (SF1B), Rice raw straw incorporation with TNAU Biomineralizer + 75% RDF + 2% Urea foliar spray (twice) (SF2B), 100% RDF (F1) were allocated to sub-plot. The outcome of the study revealed that irrigation as per SRI system (SRI) significantly recorded higher WUE of 7.32 kg ha-1 mm-1 in kharif 2021 and 6.35 kg ha-1 mm-1 in summer 2022. Concerning nutrient management practices, rice raw straw incorporation with pusa decomposer capsules + 100% RDF (SF1D) recorded marked influence with the highest WUE of 6.46 in kharif 2021 and 5.41 kg ha-1 mm-1 in summer 2022.