OPTIMISING ZINC APPLICATION IN RICE SOILS OF TAMIL NADU

Abstract

Zinc deficiency in flooded rice soils is considered as the most widespread and. perhaps the vital yield limting factor in maximising rice production. This zinc deficiency is caused by continued rice culture with high yielding varieties using high analysis fertilizers and also dispensing with organic manuring. Nine field experiments were carried out to study the effect of zinc application at 0, 25. 50 and 75 kg ZnSOj/ha on the grain yield and dry matter production in the representative rice soils viz. Entic Pellustorts, Entic Chromusterts, Typic Haplustalfs and. Ultic Haplustalls. The results clearly indicated that application of zinc at all levels significantly increased, the grain and total dry matter production over control. Zinc at 25 kg ZnSO./he registered higher. grain and total dry matter yields. The economic optimum doses of zinc varied between 25:8 and 45.4 kg ZnSO./ha for the responsive soils (Entic Pellusterts and Entic Chromu- sterts) of old delta of Thanjavur district, A common economic dose of 35.4 kg ZnSO/ha has been arrived at as a recommendation wherever soils are deficient in soil available.. zinc (<2:0 ppm DTPA-Zn).

DOI

https://doi.org/10.29321/MAJ.10.A02219

Pages

1 - 6

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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