Effect of Kharif Paddy Straw Management Options on Nitrogen Requirement to Rabi Paddy
Navya. K, Uma Reddy. R, Krishna Chaitanya. A, Suneetha Devi. K. B
Asian Journal of Soil Science and Plant Nutrition · pp. 327–335 · Published 4 May 2024
10.9734/ajsspn/2024/v10i2290Abstract
A study conducted during the rabi season of 2020-21 at the Regional Agricultural Research Station, Polasa, Jagtial, under the auspices of Professor Jayashankar Telangana State Agricultural University, yielded insightful findings. The investigation revealed that incorporating paddy straw with a C:N ratio of 71:1 led to the immobilization of soil mineral nitrogen. Specifically, during 7, 15, and 30 days after treatment (DAT), approximately 7.2, 9.3, and 7.03 kg ha-1 of available nitrogen respectively was immobilized without phosphorus, whereas with phosphorus addition, the figures rose to 10.94, 14.75, and 11.04 kg ha-1 during the same time frames. Notably, after harvest of rabi rice significantly higher soil available nitrogen levels were recorded under paddy straw incorporation with phosphorus (169.7 kg ha-1), followed by incorporation without phosphorus (161.2 kg ha-1), and paddy straw burning (151.9 kg ha-1). Moreover, the application of nitrogen at graded levels impacted soil available nitrogen. Based on these findings, it was recommended, to counteract the immobilization effect and maximize crop yield, it was advised to apply 15% excess of recommended dose of nitrogen (RDN), as basal application.
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