Improving rice productivity and soil nutrient availability through establishment and input management approaches

Résumé fourni par la source

The pursuit of enhanced rice productivity in India necessitates a comprehensive understanding of the interplay between crop establishment methods, irrigation schedules, and nitrogen management practices. This study investigates the effects of these factors on the growth and yield of rice (Oryza sativa L.), employing a split-plot experiment design. The experiment examined two crop establishment methods of direct-seeded rice (DSR) and puddled transplanted rice (PTR), three irrigation schedules of I1 (continuously submerged, CS, of 5 ± 2 cm depth), I2 (intermittent submergence of 5 ± 2 cm with irrigation after five days of water disappearance from the soil surface), and I3 (intermittent submergence of 5 ± 2 cm with irrigation after ten days of water disappearance from the soil surface) with four nitrogen management strategies of N1 (recommended dose of nitrogen, RDN), N2 (LCC threshold  4), N3 (SPAD 30), and N4 (Rice-Wheat Crop Manager recommendation, RWCM). The study found significant variations in rice growth parameters, yield components, and water efficiency due to the different treatments. Among the crop establishment methods, DSR demonstrated superior performance in terms of plant height, dry matter accumulation, crop growth rate (CGR), leaf area index (LAI), seed yield, and straw yield compared to PTR. In irrigation management, I2 exhibited superiority in all growth and yield parameters as well as soil nutrient status and water use efficiency. Nitrogen management through RWCM was found to be the most efficient and significantly higher aforementioned parameters recorded compared to the other nitrogen management treatments. RWCM’s tailored recommendations ensured optimal nitrogen availability, enhancing plant growth and yield outcomes.

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