Abstract: This experiment focused on exploring the effects of different phosphate fertilizer treatments applied to seed coating agents on the growth of rice under aluminum stress. By comparing four rice varieties treated with varying amounts of phosphate fertilizer（0,0.5,and 1.0 g）in their seed coating agents, the study aimed to provide insights into improving rice’s resistance to aluminum stress. The experimental design employed a completely randomized approach, which allowed for a robust analysis of the data by minimizing the influence of any potential confounding variables. The main focus was on measuring basic agronomic traits and root activity indexes of the rice plants. The results revealed that rice treated with 0.5 g of phosphate fertilizer in the seed coating agent performed significantly better than rice without any phosphate fertilizer treatment and rice treated with 1.0 g of phosphate fertilizer. Specifically, the agronomic trait indexes and root activity of the 0.5 g phosphate-treated rice were superior. Furthermore, rice without any phosphate fertilizer treatment also outperformed the rice treated with 1.0 g of phosphate fertilizer in all measured indexes. Under the stress of 3.75 mmol/L aluminum chloride, the rice treated with 0.5 g of phosphate fertilizer showed enhanced aluminum tolerance. This treatment not only improved the rice’s ability to withstand aluminum stress but also enhanced its germination and growth conditions. In conclusion, the study found that a moderate amount of phosphate fertilizer （0.5 g）in the seed coating agent had a beneficial effect on rice growth under aluminum stress. This treatment improved both the agronomic traits and root activity of the rice plants, making them more resilient to aluminum stress. The results provide valuable insights for future cultivation practices aimed at enhancing rice's resistance to aluminum stress.

Key words: rice, seed coating, aluminum tolerance, phosphate fertilizer