Wang et al. (2025) Development of a Real-Time Irrigation Strategy Based on Cumulative Reference Evapotranspiration (ET0) for Cabbage Cultivation in Paddy-Converted Fields

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Identification

• Journal: Agronomy
• Year: 2025
• Date: 2025-08-18
• Authors: Xin Wang, Yongjae Lee, T. H. Kang, Jong Seok Park
• DOI: 10.3390/agronomy15081981

Research Groups

Not specified in the provided text.

Short Summary

This study evaluates the use of discarded coir substrates (CS) and an IoT-based automated irrigation system to optimize cabbage production in paddy fields. The findings demonstrate that moderate irrigation levels combined with CS significantly enhance photosynthetic efficiency and crop yield compared to conventional paddy soil.

Objective

• To develop an efficient cultivation strategy for cabbage in paddy fields by comparing the effects of discarded coir substrates (CS) versus conventional paddy soil (PS) under four different irrigation levels (ETc140, ETc100, ETc60, and ETc0).

Study Configuration

• Spatial Scale: Field scale (paddy fields).
• Temporal Scale: Hourly monitoring of evapotranspiration (ET0) throughout the cultivation period.

Methodology and Data

• Models used: Penman–Monteith equation (for real-time hourly ET0 calculation).
• Data sources: LoRa-based IoT network (weather sensors and solenoid valves), Korea Meteorological Administration data.

Main Results

• System Accuracy: The automated irrigation system showed high stability, with hourly ET0 estimates being 97% consistent with official meteorological data and actual irrigation depth remaining within 2% of the calculated depth.
• Agronomic Performance: The reuse of coir substrates (CS) significantly improved cabbage photosynthetic efficiency under moderate irrigation (ETc60 and ETc100).
• Yield: The CS-ETc60 and CS-ETc100 treatments produced superior yields compared to all other tested combinations.

Contributions

• Provides a practical solution for improving water use efficiency in paddy fields.
• Promotes sustainable agriculture by repurposing discarded coir substrates to overcome drainage issues in paddy soil.
• Demonstrates the integration of IoT and real-time ET0 calculations for precision irrigation in non-traditional crop settings.

Funding

Not specified in the provided text.

Citation

@article{Wang2025Development,
  author = {Wang, Xin and Lee, Yongjae and Kang, T. H. and Park, Jong Seok},
  title = {Development of a Real-Time Irrigation Strategy Based on Cumulative Reference Evapotranspiration (ET0) for Cabbage Cultivation in Paddy-Converted Fields},
  journal = {Agronomy},
  year = {2025},
  doi = {10.3390/agronomy15081981},
  url = {https://doi.org/10.3390/agronomy15081981}
}