Effects of different potassium doses on yield and quality of two sweet corn hybrid combinations (Zea mays var. saccharata) in Ho Chi Minh City

The study aimed to determine the appropriate amount of potassium for two newly selected sweet corn hybrid combinations of the Department of Genetics and Plant Breeding, Nong Lam University, Ho Chi Minh City. The experiment was conducted in the winter-spring crop of 2023 - 2024 in Thu Duc, Ho Chi Minh City with 4 potassium levels (70, 90, 110, and 130 kg K2O/ha) and 2 combinations of sweet corn hybrids BN191, BN211 and control variety (Golden Cob). The results showed that different rates of potassium affected the yield, quality and resistance to pests and diseases of sweet corn hybrid combinations. The potassium dosage of 130 kg K2O/ha gave the highest fresh ear yield, low pests, and infection rate and highest Brix for the two selected hybrid combinations and the Golden Cob variety.