Author(s):

Shabana and Santosh Kumar

Abstract: Evolution of crop establishment methods on the performance of rice under different irrigation management was done at crop research centre, Pusa, Bihar during kharif season of 2017. The experiment was setup in split plot design with three irrigation management as main plot and four methods of crop establishment as sub plot. The treatments were replicated thrice during the experiment. Main plot treatments were continuous submergence throughout crop growth, Saturation maintenance up to P.I. and (5±2cm) after P.I. and alternate wetting and drying (5 cm irrigation at 3 DADPW) up to P.I. and (5±2cm) after P.I. whereas sub plot treatments were and normal transplanting, direct wet seeding on puddled soil, direct dry seeding and broadcasting on un-puddled soil in sub plots. The results showed that the different irrigation practices were not having significant impact on crop growth rate (CGR), dry matter accumulation, Leaf area Index, water productivity and grain yield except nutrient uptake. The maximum N uptake by grain, straw and crop was recorded with continuous submergence throughout crop growth which was statistically at par with saturation maintenance up to PI and (5±2cm) after P.I. In case of uptake of P and K by grain, straw and crop, the maximum was recorded in continuous submergence throughout crop growth which was significantly superior to alternate wetting and drying (5 cm irrigation at 3 DADPW) upto PI and (5±2 cm) after PI and saturation maintenance upto PI and (5±2cm) after PI . The impacts of different crop establishment methods on these parameters were found to be significant. The maximum LAI and plant dry matter was observed with normal transplanting which was significantly superior to direct wet seeding on puddled soil, direct dry seeding and broadcasting on un-puddled soil at all the stage of the crop. However, same trend was observed for CGR in latter stages. The maximum grain yield (40.53 q/ha) was recorded with normal transplanting which was significantly superior other treatments in the experiments.

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