Madras Agricultural Journal
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Research Article | Open Access | Peer Review

Root Growth, Nutrient Uptake and Yield of Medicinal Rice Njavara Under Different Establishment Techniques and Nutrient Sources

Volume : 100
Issue: Apr-jun
Pages: 486 - 489
Published: April 30, 2023
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Abstract


Field experiments with medicinal rice Njavara were conducted at Cropping Systems Research Centre, Karamana, Thiruvananthapuram, Kerala during summer 2007 and 2008. The experimental design was split plot with three replications. The treatments consisted of four stablishment techniques viz., System of Rice Intensification SRI (M1), Integrated Crop Establishment Method (ICM) (M2), Package of ractices (PoP) (M3) of Kerala Agricultural University and Conventional management practices (CMP) (M4) in main plot. Three nutrient sources viz., ((i) organic, (ii) integrated use of organic and inorganic, (iii) chemical fertilizers only were used under different establishment techniques. Root dry matter production was determined at weekly intervals and plant nutrients uptake was determined separately by calculating from the product of dry matter, straw dry weight, grain yield and percentage of nutrients. The result revealed that at early stages (4-6 WAT/WAS) (Weeks after transplanting/Weeks after sowing), root dry matter production hill-1 was in the order of SRI >ICM > CMP > PoP which changed to SRI > ICM > PoP > CMP from 7th week onwards. Maximum root dry matter (at 9th WAS/WAT) was recorded in SRI (0.51/0.50 g hill-1 in 007/2008). The total nutrients uptake (N, P, K, Fe, Mn and Zn) in conventional management practices was significantly higher than other establishment techniques. Among the nutrient sources, highest total (N, P, K, Fe, Mn and Zn) uptake by crop was recorded under integrated nutrient source than organic and inorganic sources.

DOI
Pages
486 - 489
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


Njavara rice establishment techniques nutrient sources root growth total nutrient uptake yield
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