Water-Saving Methods in Irrigated Rice Fields in Chanthaburi, Thailand

DOI

10.2991/absr.k.210609.035How to use a DOI?

Keywords

Alternate wetting and drying, water productivity, irrigation water use, yield, rice, seedling age

Abstract

Khao Hawm Mae Paya Tong Dam (KHMPTD) is healthy traditional rice and an attractive rice variety grown in Chanthaburi, Thailand. Due to the increasing water scarcity for rice, there is a need to develop alternative irrigation systems using less water in producing high grain yield. The study aimed to assess grain yield of KHMPTD rice under continuous flooding and alternate wetting and drying irrigation systems with two different seedling ages of transplanted rice. The study was set out following a split-plot design in randomized complete block design. Continuous flooding (CF) and alternate wetting and drying irrigation systems when the perched water is at 10 cm below soil surface (AWD10) and at 20 cm below soil surface (AWD20) occupied the main plot treatments whereas the two different seedling ages (12-day old and 25-day old) of KHMPTD rice occupied the subplot treatments. Data gathered were grain yield, irrigation water use, water used per 1 kg of unmilled rice grain, and water productivity. The results showed that when seedlings were transplanted at 12 days, AWD10 contributed to having the highest grain yield (6.53 t/ha) without grain yield decline. With this, grain yield increased by 2% with less irrigation water use (or 43% water saving) due to only 1,044 liters of water usage to produce 1 kg of unmilled rice grain. Consequently, water productivity increased up to 83% compared with CF when seedlings were transplanted at 12 days (controlled treatment). Through multiple regression analysis, water productivity explains the 99% of the grain yield under AWD10. Therefore, AWD10 when seedlings were transplanted at 12 days is the best water-saving method for KHMPTD rice production in Chanthaburi, Thailand.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Bancha Wiangsamut
AU  - Manoch Koolpluksee
AU  - Chaiwat Makornpas
AU  - Maria Evangeline L. Wiangsamut
PY  - 2021
DA  - 2021/06/11
TI  - Water-Saving Methods in Irrigated Rice Fields in Chanthaburi, Thailand
BT  - Proceedings of the International Seminar on Promoting Local Resources for Sustainable Agriculture and Development (ISPLRSAD 2020)
PB  - Atlantis Press
SP  - 219
EP  - 224
SN  - 2468-5747
UR  - https://doi.org/10.2991/absr.k.210609.035
DO  - 10.2991/absr.k.210609.035
ID  - Wiangsamut2021
ER  -