Mitigating The Negative Impacts of Progressive Salinity and Drought Stresses in Maize Using Various Potassium Fertilizers Sources | ||
| Assiut Journal of Agricultural Sciences | ||
| Article 17, Volume 54, Issue 2, April 2023, Pages 232-249 PDF (626.63 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajas.2023.184609.1218 | ||
| Authors | ||
| Elsayed A.A. Abdelraouf* ; Ibrahim N. Nassar; Abdelwahed M. Salama; Ahmad M. Abdallah | ||
| Department of Natural Resources and Agricultural Engineering, College of Agriculture, Damanhour University, Damanhour, Egypt. | ||
| Abstract | ||
| With water resources becoming more limited in arid and semi-arid regions, growers use low-quality water for irrigation. An outdoor pot experiment was conducted during the summer season of 2022 in northern Egypt to identify the best irrigation regime with saline water and K fertilizer that boosts maize tolerance for drought and salinity stresses. The salinity of irrigation water used possessed 4.38 dS/m. Irrigation levels were 40, 60, and 80% potential ET, and the types of K salt were 0.0 K(Control), K2SO4 (0.05 g kg-1 soil), KNO3 (0.05 g. kg-1 soil), and Salwax (0.02 g kg-1 soil). Germination percentage, growth parameters, leaves nutrient contents, yield and its attributes, and water use efficiency were monitored. The results showed that the final total soluble salt accumulated in the soil after harvest differed significantly among the three levels of irrigation. K salts had no significant effect on germination percentage and stem diameter, while Salwax significantly increased N, K, Mg, and Ca content in the maize leaves. Obviously, the KNO3 possessed the greatest growth parameters followed by Salwax in comparison to the control. Irrespective of the irrigation level, both K2SO4 and KNO3 significantly increased the biological yield over the control by 4.5%, while Salwax attained a biological yield similar to the control. All K salts increased the WUE and the biomass-WUE, where the KNO3 had the highest positive effect. In conclusion, using saline water in irrigation maize crop is possible even at 40% of potential evaporation (ET) level with leaching monthly by 125% ET beside KNO3 fertilization on three doses after leaching event. | ||
| Keywords | ||
| drought; salinity; irrigation; maize; potassium | ||
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