In order to reveal the abundance of N₂O reducers and their critical driving factors in the rhizosphere soils of typical Chinese fir plantation from Fujian Province, rhizosphere soil samples under Chinese fir plantation from three typical forest farms in Fujian Province were collected. The abundance of functional genes of soil N₂O reducers, namely nosZ I and nosZ II, were determined using real-time quantitative PCR. Results showed that the abundance of nosZ I gene was significantly higher than that of nosZ II in the rhizosphere soils of Chinese fir plantation in all the three typical forest farms, which suggested that nosZ I-type N₂O reducers dominate in the acidic rhizosphere soils of Chinese fir plantation, possibly due to the fact that the nosZ II-type N₂O reducers are more sensitive to low pH conditions. Among the three forest farms, the abundance of nosZ I gene was 2.53×10⁷ copies/g in Wuyishan National Park, and significantly higher than 9.27×10⁶ copies/g in Sanming Forest Ecosystem National Observation and Research Station and 8.90×10⁶ copies/g in Shanghang Baisha Stated-owned Forest Farm. However, there was not significant difference in nosZ II abundance among the three forest farms. Random forest analysis showed that soil pH was the key environmental factor regulating the abundance of nosZ I and nosZ II. In conclusion, the abundance of nosZ I gene varies substantially in the rhizosphere soils of Chinese fir plantation from three typical forest farms in different regions of Fujian Province, while soil pH is the most important driving factor.