Effects of alternate wetting and drying or low light intensity factors on increasing grain yield and 2AP content in fragrant rice

Authors

  • Jerico Noynay Agricultural Research and Development Program, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, 73140, Thailand
  • Cattleya Chutteang Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, 73140, Thailand
  • Jamnian Chompoo Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, 73140, Thailand
  • Tossapon Pornprom Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, 73140, Thailand
  • Chanate Malumpong Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom, 73140, Thailand

Keywords:

Aromatic rice, Grain yield, Ligh intensity, Water management, 2AP content

Abstract

Importance of the work: Alternating wetting and drying (AWD) is a technology that
can save water without affecting yield and may increase the 2-acetyl-1-pyrroline (2AP)
content. Furthermore, low light intensity (LL) may reduce yield but increase the 2AP
content.
Objectives: To investigate the effects of AWD and LL conditions and their interactions on
Hom Malaiman (HMM) aromatic rice variety in paddy fields.
Materials and Methods: HMM was grown over three consecutive seasons. A randomized
complete block split plot design was used to investigate water management (continuous
flooding (CF) and AWD) and light intensity (natural light (NL) and low light) conditions.
Results: Water management (W) and light conditions (L) affected agronomic,
physiological and grain quality traits. The W × L interaction had significant effects on
grain yield and 2AP content. AWD significantly increased the grain yield by 16.31%
compared to the CF condition, whereas LL decreased the grain yield by 16.00%
compared to the NL condition. AWD × NL resulted in the highest grain yield, whereas CF
× LL resulted in the lowest yield. AWD and LL increased the 2AP content in rice grains
by 3.22% and 8.28%, respectively. In addition, AWD × LL produced the highest 2AP
content, whereas CF × NL produced the lowest 2AP content.
Main finding: The interaction between AWD and LL may not be suitable for increasing
yield together with increasing the 2AP content. In addition, the influence of LL was
greater than that of AWD in terms of increasing the 2AP content

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Published

2026-03-05

How to Cite

Noynay, Jerico, Cattleya Chutteang, Jamnian Chompoo, Tossapon Pornprom, and Chanate Malumpong. 2026. “Effects of alternate wetting and drying or low light intensity factors on increasing grain yield and 2AP content in fragrant rice”. Agriculture and Natural Resources 59 (3). Bangkok, Thailand:590311. https://li01.tci-thaijo.org/index.php/anres/article/view/268871.

Issue

Vol. 59 No. 3 (2025): ANRES

Section

Research Article

License

Copyright (c) 2025 online 2452-316X print 2468-1458/Copyright © 2025. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/), production and hosting by Kasetsart University Research and Development Institute on behalf of Kasetsart University.

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.