Estimating soil water contents from field water tables for potential rice irrigation criteria under contour-levee irrigation systems

Naoya Takeda*, Lorena López-Galvis, Dario Pineda, Armando Castilla, Taro Takahashi, Shinji Fukuda, Kensuke Okada

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

2 Citations (Scopus)

Abstract

Contour-levee irrigation systems are commonly used in rice cultivation in Latin American and the Caribbean countries, but research-based criteria for irrigation timing have not yet been determined under field conditions. In this study, we determined the relationship between soil volumetric water content (SWC) and field water table (FWT) for potential use in developing practical irrigation criteria based on FWT. Field experiments were conducted at four farms in Ibagué, Colombia from 2017 to 2018. The SWC at different soil depths and the FWT were constantly measured over the crop cycle using soil moisture sensors and piezometers with water level sensors, respectively. The resulting relationships were fitted with linear-plateau models and validated with satisfactory prediction performances. The FWT at actual irrigation timings was observed and compared with the FWT at field capacity at 10 cm soil depth (reference FWT) using the validated relationship. The observed range of threshold FTWs (46.2 to 9.2 cm) was comparable to the reference FWTs except one field (21.4 to 12.9 cm). Although developing practical irrigation criteria as FWT still requires thresholds of SWC under a target contour-levee irrigation system, this study demonstrated the relationships between FWT and SWC in fields in Colombia.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalEnvironmental Control in Biology
Volume57
Issue number2
DOIs
Publication statusPublished - 1 Apr 2019

Bibliographical note

Funding Information:
Part of this research was conducted under the Science and Technology Research Partnership for Sustainable Development (SATREPS) Project “Development and Adoption of Latin American Low-input Rice Production System through Genetic Improvement and Advanced Field-management Technologies” supported by the Japan Science and Technology Agency (JST) and the Japan International

Funding Information:
Part of this research was conducted under the Science and Technology Research Partnership for Sustainable Development (SATREPS) Project “Development and Adoption of Latin American Low-input Rice Production System through Genetic Improvement and Advanced Field-management Technologies” supported by the Japan Science and Technology Agency (JST) and the Japan International Cooperation Agency (JICA).

Publisher Copyright:
© 2019 Biotron Institute. All rights reserved.

Keywords

  • Contour-levee irrigation
  • Farm management
  • Field water level
  • Soil water content
  • Water-use efficiency

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