1University of Agriculture and Forestry, Hue University, Hue City, Vietnam
2Alliance of Biodiversity International and CIAT, Hanoi, Vietnam
*Corresponding Author: T.T.H. Hoang, University of Agriculture and Forestry, Hue University, Hue City, Vietnam, Email: htthoa@hueuni.edu.vn
Online published on 7 February, 2026.
Soybean (Glycine max L.) is an important legume crop in the human diet, which is grown mainly for its edible bean. Rhizobium inoculation can enhance soybean production, but its effectiveness depends on several factors, including crop management, environment, Rhizobium strains and soybean varieties. The study aimed to evaluate how different soybean varieties responded to Rhizobium inoculation in Hue city, Central Vietnam.
Pot and field experiments were conducted in coastal sandy soil in 2024 in two cropping seasons. Twelve treatments, including two factors of 6 soybean varieties combined with and without inoculation of Rhizobium (control), were laid out in a RCBD and split plot designs with three replications. Data was collected as nodule number, seed yield and nitrogen fixation efficiency.
The results obtained showed significant differences (p<0.05) in nodules mean score, seed yields and N fixation between inoculated and no inoculated treatments. The variety DT90 responded to the Rhizobium inoculants recorded the best in all parameters under observation. Although further studies need to be conducted to obtain conclusive information on these nitrogen fixers, the study indicates that DT90, in combination with the right Rhizobium inoculants, could be recommended to replace conventional fertilization for coastal sandy soil in Central Vietnam.
N fixation, Rhizobium, Sandy soil, Soybean variety, Yield
