| Abstrakt: |
A field experiment entitled 'Influence of different methods of sowing, mulching and precision nitrogen management on growth and yield of aerobic rice' was conducted during kharif 2021-22 and 2022-23 at Agronomy Field Unit, ZARS, GKVK, Bengaluru. The experiment was laid out in a split-split plot design consisting methods of sowing (S1 - Raised bed and S2 - Flat bed) as main plot treatments with polythene mulching (M0 - without mulching and M1 - with mulching) as sub plots treatment and five nitrogen managements (N1-Nutrient expert, N2-Site specific nutrient management (SSNM), N3-Green seeker, N4-Nano urea and N5-RDN) as sub-sub plot treatments. Irrigation was provided through drip throughout the crop duration. Experiment consisted of twenty treatment combinations and replicated thrice. The results of pooled data revealed that raised bed had higher plant height (19.18 and 93.11 cm at 30 and 90 DAS, respectively), leaf area (3182 cm2 at 90 DAS), number of panicles plant-1 (23.73), grain yield (5831 kg ha-1) and straw yield (7181 kg ha-1) over flat bed. The polythene mulching treatment outperformed over without mulching by recording higher plant height (19.81 and 95.78 cm at 30 and 90 DAS, respectively), leaf area (3238 cm2 at 90 DAS), number of panicles plant-1 (24.39), grain yield (5999 kg ha-1) and straw yield (7364 kg ha-1). Among the nitrogen management practices, following the recommendations of nutrient expert recorded higher plant height (20.35 and 97.99 cm at 30 and 90 DAS, respectively), leaf area (3316 cm2 at 90 DAS), number of panicles plant-1 (25.53), grain yield (6235 kg ha-1) and straw yield (7620 kg ha-1) over other practices. The results of the treatment SSNM in respect of plant height (19.15 and 95.53 cm at 30 and 90 DAS, respectively), leaf area (3224 cm2 at 90 DAS), number of panicles plant-1 (24.75), grain yield (6014 kg ha-1) and straw yield (7461 kg ha-1) were found on par with nutrient expert. Sustainable aerobic rice production can be achieved by the adoption of raised bed with polythene mulching and nitrogen management through nutrient expert which also benefit farmers with higher yield, economics and conserve resources. [ABSTRACT FROM AUTHOR] |
