Impacts of split application of organic fertilizer on nitrogen uptake and use efficiency in direct-seeded rice

Authors

  • K Ashok Kumar Acharya N.G. Ranga Agricultural University, Agricultural Research Station-515001, Anantapuramu (Dist.), Andhra Pradesh, India
  • Dillip Kumar Swain Agricultural and Food Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur - 721 302, India

DOI:

https://doi.org/10.3329/bjb.v54i2.82025

Keywords:

Direct seeded rice, N uptake, Nitrogen use efficiency, Organic fertilizers, Split-application

Abstract

Improved nitrogen fertilizer management in organic rice cultivation improves nitrogen use efficiency, lowering N losses and, ultimately reducing environmental deterioration. A field experiment was conducted to assess the impact of twice-split organic nutrient management strategy on N absorption and nitrogen use efficiencies (NUE) in direct seeded rice production (DSR) system. The N absorption pattern estimated through logistic model showed that the fast N uptake time with VC100 was considerably longer than that of CF100. Synchronization of soil available N and crop N demand for a longer duration during the fast N uptake phase, vermi compost (VC) applied in twice-splits increased N uptake, dry matter production, yield characteristics and grain yield compared to CF100. It was concluded that VC applied in twice, i.e., basal fertilizer and top dressing at 5 days before panicle initiation was as effective as CF100 in enhancing NUE of DSR in lateritic soil.

Bangladesh J. Bot. 54(2): 311-318, 2025 (June)

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Published

2025-06-26

How to Cite

Kumar, K. A., & Swain, D. K. (2025). Impacts of split application of organic fertilizer on nitrogen uptake and use efficiency in direct-seeded rice . Bangladesh Journal of Botany, 54(2), 311–318. https://doi.org/10.3329/bjb.v54i2.82025

Issue

Vol. 54 No. 2 (2025)

Section

Articles

License

© Bangladesh Botanical Society

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