Weed Management Practices on Nutrient Uptake, Yield Attributes and Yield of Rice Under System of Rice Intensification

Abstract

An experiment was conducted at wetland farm of Tamil Nadu Agricultural University, Coimbatore during August to January 2009 to test the effect of different weed management practices on the nutrient uptake by weeds and SRI rice. The major weeds found in the experimental field were Echinochloa crus-galli (L.), Cyperus difformis (L.), Eclipta alba (L.) and Ammania baccifera (L.). The application of pretilachlor as pre-emergence at 0.75 kg a.i. ha -1 + 4 times conoweeding from 10 DAT at 10 days interval (T 5 ) has recorded significantly lower uptake of N, P, K by weeds and it was on par with the application of butachlor as pre-emergence at 1 kg a.i. ha -1 + 4 times conoweeding from 10 DAT at 10 days interval (T4 ) and application of almix as post-emergence at 20 g a.i. ha -1 + 4 times conoweeding from 10 DAT at 10 days interval (T 3 ). The highest uptake of N, P, K and maximum yield by SRI rice was recorded by application of pretilachlor as pre-emergence at 0.75 kg a.i. ha -1 + 4 times conoweeding from 10 DAT at 10 days interval (T 5 ).

DOI

https://doi.org/10.29321/MAJ.10.100013

Pages

51 - 54

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