Management of Sesbania aculeata Incorporation and Nitrogen on the Performance of Transplanted Rice in Calcareous Soil |
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| Authors: | Sanjay Kumar Chaudhary Shankar Jha Yogeshwar Singh |
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| Institution: | 1. Department of Agronomy, Dr. Rajendra Prasad Central Agricultural University, Samastipur, India;2. Department of Soil Science, Dr. Rajendra Prasad Central Agricultural University, Samastipur, India;3. School of Atmospheric Stress Management, National Institute of Abiotic Stress Management, Baramati, India |
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| Abstract: | Two field experiments were conducted to optimize the days for decomposition of dhaincha (Sesbania aculeata) with different nitrogen (N) levels and scheduling in transplanted rice in calcareous soil in a split-plot design with three replications. Incorporation of dhaincha one day before transplanting (1-DBT) obviated the need for allowing N gap. Nitrogen scheduling as 50% at active tillering + 40% at panicle initiation + 10% at flowering recorded the maximum grain yield (59.05 q ha?1) and N–?phosphorus (P)–?potassium (K) uptake. The different N fractions in post-harvest soil were in the order of total N> total hydrolyzable N> non-hydrolyzable N> exchangeable ammonium (NH4+)–?N and nitrate (NO3?)–?N. Thus, in calcareous soil, rice may be transplanted immediately after burying the dhaincha without any time gap along with 80 kg N ha?1. Also, application of nitrogenous fertilizer in three splits, delaying N application until active tillering stage, is beneficial for improving rice productivity. |
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| Keywords: | Calcareous soil dhaincha nitrogen nitrogen fractions rice |
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