An Empirical Model to Predict the Rice Crop Response to the Total Soil Water Potential and Soil Compaction under Irrigation with Alternate Wetting and Drying Technology | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 5, Volume 16, Issue 6, June 2025, Page 177-185 PDF (797.87 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2025.367547.1277 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Enas Soliman  
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| Soils Department, Faculty of Agriculture, Mansoura University - 35516, Mansoura, Egypt | ||||
| Abstract | ||||
| Alternate wetting and drying (AWD) is a water-saving technology that flooded rice fields can apply to reduce water use in irrigated fields. This study aims to predict rice production by the function of total soil water potentials, and to examine the relationship between the total soil water potential (TSWP, Ψt) and soil compaction. A field experiment was carried out during the summer season of 2022, the treatments were either maintained flooded, equilibrated to −10 kPa (A0), or dried to −20 kPa (A1), or dried to −30 kPa (A2) and then re-flooded at the water potential of −10 kPa (A0 - control). The previous treatments were along with two nitrogen levels (N1 = 124, and N2 = 165 kg N ha−1) that represents 75 and 100% of the recommended dose with three replications. The AWD increased the pores percentage slightly, but it has a clear trend in increasing the soil mechanical resistance and macro-porosity. Also, the TSWP function could be used to predict the rice yield in early time. The AWD technique (at matric potential of −20 kPa) could save water to about 25% with a relative yield (Yr) of 70% (at 75% N level). This investigation showed the possibility of using simple empirical tool to describe the rice crop response to the Ψt changes and soil compaction using a low number of inputs with an accurate and rapid determination. These results have shown a high agreement between the predicted values and the experimental (R2) at a range of (0.91–0.97). | ||||
| Keywords | ||||
| Water potential; Alternative wetting and drying; Soil compaction; Rice yield | ||||
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