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In order to study the absorption preference of blueberry cluster branches for different forms of nitrogen, the growth, water content, chlorophyll, ammonium nitrogen and nitrate nitrogen content in leaves of blueberry cluster branches were measured by field fertilization experiments with different nitrogen forms. The effects of different nitrogen forms on the growth of blueberry cluster branches were also analyzed. In the experiment, 8 groups of fertilization schemes with different proportions of ammonium nitrogen and nitrate nitrogen and different pH values were set, and other variables were kept consistent. The plants in each experimental group were fertilized regularly and quantitatively. After three months, the physiological indexes of the clumping branches of blueberry in each group were calibrated and analyzed. The results showed that the growth of blueberries in the mixed nitrogen form treatment group was generally better than that in the single nitrogen form treatment group. In the process of blueberry culture, the ratio of ammonium nitrogen and nitrate nitrogen was 2:1 and the pH value was 5.0, the plant growth was the best, and the growth, water content and chlorophyll content could reach the maximum. The differences between groups were significant, which indicated that the nitrogen utilization rate of blueberry cluster branches was higher. [ABSTRACT FROM AUTHOR]