Impact of calcium and cobalt foliar application on sugar beet quality under different irrigation levels

Document Type : Original Research Articles.

Authors

1 Department of Agronomy, Faculty of Agriculture, Assiut University, Egypt

2 Sugar Crops Institute, Agriculture Research Center, Giza, Egypt

10.21608/esugj.2025.402221.1081

Abstract

Two field experiments were conducted during the 2021/2022 and 2022/2023 seasons at Mallawi Research Station, El-Minia Governorate, Egypt, to investigate the effects of calcium and cobalt foliar application on sugar beet quality under varying irrigation regimes. A split-plot design with three irrigation levels (full, moderate stress, and severe stress) was used as the main plots, while combinations of calcium (0, 4, and 8 kg/fed CaCl2) and cobalt (0, 10, 20, and 30 ppm CoCl2) treatments were assigned to subplots. Results indicated that moderate water stress enhanced sugar quality traits without compromising yield. Calcium and cobalt significantly improved sucrose content and sugar recovery, with optimal effects at moderate rates. Interaction effects among irrigation, calcium, and cobalt treatments were significant for most traits. The combination of moderate stress, 8 kg/fed calcium, and 20 ppm cobalt produced the best overall quality. These findings highlight the potential of nutrient management to mitigate water stress effects on sugar beet quality.

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