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Abstract

The study was conducted to determine the appropriate NPK fertilizer dosage during the fruit development stage leading to the occurrence of physiological disorders (PD) in 7-year-old Musang King durian trees in Phong Dien District, Can Tho City, from December 2023 to May 2024. The experiment followed a completely randomized block design with 4 treatments and 5 replications, with one tree as each replication. The four treatments corresponded to four NPK fertilizer dosages: 0.5 kg, 0.75 kg, 1.0 kg, and 1.25 kg/tree/application. These were applied at three different times during the fruit-setting process, with varying N:P:K ratios: 2:1:1 at 30 days after fruit set (DAFS), 2:1:3 at 45 DAFS, and 1:1:3 at 60 DAFS. Results showed that NPK fertilizer dosage significantly affected fruit weight, yield, and fruit quality of Musang King durians. Applying 1.0-1.25 kg NPK per tree per application increased fruit weight but also worsened the incidence of PD. In contrast, applying 0.75 kg NPK per tree per application (with NPK ratios of 2:1:1 at 30 DAFS, 2:1:3 at 45 DAFS, and 1:1:3 at 60 DAFS) reduced PD occurrence by 25-50% and resulted in higher yield and fruit quality compared to other treatments. Therefore, applying 0.75 kg NPK/tree/application is recommended for 7-year-old Musang King durians during the main fruiting season to achieve high yield and reduce PD during the season.

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How to Cite
Nguyen Huynh Duong, Trinh Anh Quan, Le Vinh Thuc, & Tran Van Hau. (2025). Effect of NPK fertilizer dosage on yield and physiological disorder of Musang King durian in Phong Dien district, Can Tho city. E-Journal of Agricultural Science and Technology, 9(3), 5036–5045. https://doi.org/10.46826/huaf-jasat.v9n3y2025.1257
Section
PLANTS

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