Influence of flyash on soil properties, nutrient uptake and yield of rice in Inceptisol Alluvium

Abstract

Field experiment was conducted at Lower Bhavani Project (LBP) area to study the effect of application of flyash in combination with fertilizer, organic manures and biofertiliser (Azospirillum) on soil properties and yield of rice. The flyash contains a wide range of nutrients (P, K, Fe, B, Si, Ca, Mg and S) and traces of heavy metals. The results of the experiment revealed that application of flyash @ 20 and 40 t ha significantly increased the grain yield of rice crop to the tune of 5.6 and 12.5 t ha', respectively. Application of NPK fertilisers as per STCR technology through fertilisers, fertilizer + compost and fertilizer + compost +Azospirillum recorded an yield increase of 3.12, 3.53 and 3.56 t ha' respectively over the treatments without any fertilizer addition. The highest yield of 7.26 t ha' was recorded in the treatment which received flyash @ 40 t ha' along with fertilizer; compost and fertilizer. The significant increase in the nutrient uptake of rice indicated that flyash could serve as source of plant nutrients. The results of the post harvest soil analysis indicated that application NPK ferilisers significantly increased the available NPK status of the soil, while application of flyash significantly increased the available P, K, Ca, Mg, S, Si and B content of the soil. The effect of flyash was more pronounced when applied along with fertilisers and organic manures.

DOI

https://doi.org/10.29321/MAJ.10.A01343

Pages

456 - 463

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.

Keywords