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Article

A Model of Evapotranspirative Irrigation to Manage the Various Water Levels in the System of Rice Intensification (SRI) and Its Effect on Crop and Water Productivities

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Department of Civil and Environmental Engineering, Kampus IPB Darmaga, IPB University, Bogor 16680, Indonesia
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Department of Geophysics and Meteorology, Kampus IPB Darmaga, IPB University, Bogor 16680, Indonesia
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Department of Agronomy and Horticulture, Kampus IPB Darmaga, IPB University, Bogor 16680, Indonesia
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Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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Author to whom correspondence should be addressed.
Academic Editor: Alban Kuriqi
Water 2022, 14(2), 170; https://doi.org/10.3390/w14020170
Received: 20 November 2021 / Revised: 31 December 2021 / Accepted: 4 January 2022 / Published: 8 January 2022
(This article belongs to the Topic Water Management in the Era of Climatic Change)
Evapotranspirative irrigation is a simple idea in a watering field based on the actual evapotranspiration rate, by operating an automatic floating valve in the inlet without electric power to manage water levels. The current study introduces a model of evapotranspirative irrigation and its application under different water levels. The objectives were (1) to evaluate the performances of evapotranspirative irrigation under various irrigation regimes, and to (2) to observe crop and water productivities of the system of rice intensification (SRI) as affected by different types of irrigation. The experiment was performed during one rice planting season, starting from July to November 2020, with three irrigation regimes, i.e., continuous flooded (CFI), moderate flooded (MFI) and water-saving irrigation (WSI). Good performance of the system was achieved; low root mean square error (RMSE) was indicated between observed water level and the set point in all irrigation regimes. Developing a better drainage system can improve the system. Among the regimes, the WSI regime was most effective in water use. It was able to increase water productivity by up to 14.5% while maintaining the crop yield. In addition, it has the highest water-use efficiency index. The index was 34% and 52% higher than those of the MFI and CFI regimes, respectively. Accordingly, the evapotranspirative irrigation was effective in controlling various water levels, and we recommend the system implemented at the field levels. View Full-Text
Keywords: evapotranspiration; irrigation regime; paddy field; water level; water use efficiency evapotranspiration; irrigation regime; paddy field; water level; water use efficiency
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MDPI and ACS Style

Arif, C.; Saptomo, S.K.; Setiawan, B.I.; Taufik, M.; Suwarno, W.B.; Mizoguchi, M. A Model of Evapotranspirative Irrigation to Manage the Various Water Levels in the System of Rice Intensification (SRI) and Its Effect on Crop and Water Productivities. Water 2022, 14, 170. https://doi.org/10.3390/w14020170

AMA Style

Arif C, Saptomo SK, Setiawan BI, Taufik M, Suwarno WB, Mizoguchi M. A Model of Evapotranspirative Irrigation to Manage the Various Water Levels in the System of Rice Intensification (SRI) and Its Effect on Crop and Water Productivities. Water. 2022; 14(2):170. https://doi.org/10.3390/w14020170

Chicago/Turabian Style

Arif, Chusnul, Satyanto K. Saptomo, Budi I. Setiawan, Muh Taufik, Willy B. Suwarno, and Masaru Mizoguchi. 2022. "A Model of Evapotranspirative Irrigation to Manage the Various Water Levels in the System of Rice Intensification (SRI) and Its Effect on Crop and Water Productivities" Water 14, no. 2: 170. https://doi.org/10.3390/w14020170

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