Comparative Morphological Response of Wheat Genotypes (Triticum aestivum L.) to Potassium Treatments Under Irrigated and Terminal Drought Conditions

Year 2024, Volume: 7 Issue: 2, 280 - 293, 31.12.2024

Umar Farooq , Abdul Basit , Faiz Ul Hassan , Mishal Kainat , Muhammad Abu Bakar Zia

https://doi.org/10.46876/ja.1548193

Abstract

Worldwide wheat productivity faces limitations due to environmental stresses, of which drought is a key factor, necessitating effective nutrient management strategies such as potassium (K) application to enhance stress tolerance and yield stability. Field experiments were conducted during the 2022-23 growing season to analyze the response of different genotypes to K concentrations under terminal drought conditions (TDC). Field experiments conducted during the 2022-23 growing season analyzed the response of eight wheat genotypes to three potassium concentrations (K1: 0%, K2: 1%, K3: 2%) under TDC. The study showed a significant positive correlation between yield and several plant parameters, including height, panicle length, number of spikelets, flag leaf area, yield per plant and thousand-grain weight. Results showed that K3 application resulted in significant improvements, especially under stressful conditions. Under irrigation, the plant height of Ghazi-2019 increased by 15% (99 cm), while the thousand-kernel weight of Subhani-2021 increased by 20% (69 g). In TDC, Akbar-19 yields increased by 25% (7.7 g/plant) using K3 compared to K1. Faisalabad-2008 yield increased by 30% under K2 (7.1 g/plant) irrigation. Applying K to wheat under both irrigation and TDS can significantly increase wheat yield in the later stages of growth.

Keywords

wheat, drought, potassium, grain yield, genotypes

Supporting Institution

University of Layyah

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