INTEGRATED NITROGEN MANAGEMENT OF LOWLAND TRANSPLANTED RICE OF WEST ZONE OF TAMIL NADU

Abstract

Field experiments were conducted during 1991-94 at Tamil Nadu Agricultural University, Coimbatore to develop integrated N management practice for lowland transplanted rice. The treatments included placement of urea super granules (USG) at 100 kg N/ha, application of prilled urea (PU) at 100 kg N/ha, application of 75 kg N as PU with azolla or FYM or green manure or azospirillum and application of 50 kg N as PU with the combined use of azospirillum, azolla and green manure. The results of three-years study revealed the superiority of the placement of USG over the other treatments. The next best treatment was the application of PU at 100 kg N/ha. However, application of 75 Kg N as PU combined with either azolla or green manure (Sesbania rostrata) registered comparable yields. Substitution of 25 kg N as chemical fertiliser with either azolla or green manure was clearly seen. Possibility of substitution of chemical N fertilisers even to the extent of 50 per cent by the combined use of 50 kg N as PU with Azospirillum, azolla and Sesbania rostrata green manuring was also observed.

DOI

https://doi.org/10.29321/MAJ.10.A00652

Pages

542 - 546

Creative Commons

Copyright

© The Author(s), 2025. Published by Madras Agricultural Students' Union in Madras Agricultural Journal (MAJ). This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited by the user.

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