IMPROVING WATER PRODUCTIVITY FOR OPTIMIZING DURUM WHEAT CROP YIELD BY USING SUPER ABSORBENT POLYMER UNDER VARIOUS IRRIGATION REGIMES AND POTASSIUM FRETILIZATION IN TOSHKA.

Document Type : Review Article

Authors

1 National water recearch center-Ministry of Water Resources and Irrigation - Consultation and Information Unit, Toshka - Abu Simbel - Aswan

2 Faculty of Graduate Studies and Environmental Research, Ain Shams University

3 Faculty of Agriculture, EL Azhar University

4 Water Studies and Research Complex, National Water Research Center

Abstract

During 2019/2020 and 2020/2021 seasons, the current study was conducted at the experimental farm, Water Studies and Research Complex (WSRC) Station, National Water Research Center, Toshka, Aswan, Egypt. Durum wheat crop (Triticum durum L.) of (Sohag3) used to improve water productivity under different irrigation regimes, potassium fertilization rates and Super Absorbent Polymer in sandy loam soils irrigated with ground water. Twelve treatments were created by combining the three irrigation regimes adequate (100%), moderate (80%) and deficient (60%) from crop evapotranspiration (ETC), Super Absorbent Polymer (SAP) in the form of hydroxyethylcellulose at the rate of (6 g/kg soil) application rates (compared with control) by mixing with soil and two potassium fertilization in the form of potassium sulphate (48% K2O) rates (50 and 100 % K). These were then replicated five times and put in a completely random pattern (split-split) in both seasons.
The results proved that biological, grain and straw yields for durum wheat crop gave significant results. All interactions effects among the studies factors were insignificant indicating that the tested crop were similarly responded to both the irrigation regimes, adding Super Absorbent Polymer (SAP) and potassium treatment except the interaction between irrigation regimes and super absorbent polymer (SAP) in some factors were significant. The data revealed that 100% ETC + adding SAP + 100% potassium exhibited the highest durum wheat crop productivity. However 60% ETC without adding SAP + 50% potassium recorded the lowest durum wheat crop productivity. It was found that the durum wheat crop productivity under water level of (60%) of crop evapotranspiration (ETC) + 100% K + adding SAP is equivalent to the durum wheat crop productivity under water level of 80% of crop evapotranspiration + 50% K without polymer. It was found that the durum wheat crop productivity under water level of 80% of crop evapotranspiration (ETC) + 100% K + adding SAP is equivalent to the durum wheat crop productivity under water level of 100% of crop evapotranspiration (ETC) + 100% K without polymer. It was found that the durum wheat crop productivity under water level of 80% of crop evapotranspiration + 50% K + adding SAP is equivalent to the durum wheat crop productivity under water level of 100% of crop evapotranspiration + 50% K without polymer.

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Journal of Environmental Science
Volume 51, Issue 4 - Serial Number 4
part7: Agricultural Sciences
April 2022
Pages 1-23

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