AMMONIA VOLATILIZATION LOSSES FROM APPLIED UREA IN FLOODED ALKALI SOILS

Abstract

A laboratory study was conducted to evaluate the effect of different factors on ammonia volatilization losses in flooded alkali soils (ESP 26 & 82). Incubation studies in these soils showed that the losses were largely governed by pH/alkalinity of the system. The duration of presubmergence decreased the cumulative ammonia volatilization losses from 19.2 to 13.5 per cent in ESP 26 soil and 22.5 to 16.0 per cent in ESP 82 soil at 0.5 and 10 cm floodwater depths, respectively. Flooding of the soil decreased the soil pH resulting in lower losses from 23.9 to 16.9 per cent in ESP 26 soil and 27.8 to 19.3 per cent in ESP 26 soil and 27.8 to 19.3 per cent in ESP 82 soil. The cumulative ammonia losses were maximum in the control treatment followed by Dhaincha straw, FYM, Rice husk and Wheat straw, varied from 8.1 to 16.9 per cent in ESP 26 soil and 9.0 to 20.5 per cent in ESP 82 soil. respectively. The floodwater NHi+, ptt and Cos" + HCO in all the experiments followed the same trend in which the losses occurred.

DOI

https://doi.org/10.29321/MAJ.10.A00682

Pages

29 - 34

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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