Effect of Spraying with Zeatin and Potassium Phosphite on Growth, yield and Tubers Quality of Potato during Summer Season

Document Type : Original Article

Authors

Veg. Res. Dept., Hort. Res. Inst., Agric. Res. Center, Giza, Egypt

10.21608/hrj.2025.449605

Abstract

This study was conducted during the summer seasons of 2022/2023 and 2023/2024 on a private vegetable farm in Basat Karim El-Din village, Sherbin district, Dakahlia Governorate, Egypt, with the aim of studying the effect of foliar spraying with each of the two Zeatin (ZT) and potassium phosphite (KPhi) at a concentration of (0, 1, 1.5, 2.5 ml/L for each of them individually or in combination with the aim of obtaining the highest productivity and best specifications for the quality of potato tubers of Cara variety. The most important results obtained were as follows: All concentrations of both zeatin and KPhi led to a significant increase in plant growth, leaf chemical components, productivity and quality of potato tubers compared to the control treatment (zero ZT or KPhi). However, spraying potato plants four times with zeatin and potassium phosphite at 2.5 ml/L each resulted in the best growth (plant height, number of leaves and stems, leaf area, dry weight of leaves/plant, total chlorophyll (SPAD) and catalase in the leaf), and improved crop characteristics (average tuber weight, average number of tubers/plant, yield/plant and total yield/fed.) and best tuber quality (N, P and K contents, dry matter percentage, TSS and starch contents). On the other hand the control treatment showed the highest levels of Malondialdehyde (MDA), a marker of oxidative stress.

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