[Objective] The effects of different root treatments on the growth performance of Pinus densiflora var. zhangwuensis were studied in order to provide a science-based method to boost afforestation in the Beijing City.[Methods] A completely randomized block experiment was conducted in Miyun District of Beijing City. The experiment was conducted to study the effects of different treatments on the survival rate

growth rate

leaf traits

dry matter content of 5-year-old Pinus densiflora var. zhangwuensis

including compound microbial agent

ABT-3 rooting powder and a 1:1 mixture of the two treatments.[Results] When applying the ABT-3 rooting powder alone

the ground diameter

underground biomass

afforestation survival rate and afforestation cost were the best; when applying compound microbial agents alone

seedling height

ground diameter

annual average growth

dry matter quality on the ground

the total dry matter quality

needle thickness

needle area and chlorophyll content were the best of all; The measured indexes of the mixed treatment were lower than the single treatment

but higher than the control treatment.[Conclusion] In the afforestation of Pinus densiflora var. zhangwuensis in Beijing City

in addition to the conventional tending management

the use of compound microbial agents may not only improve the survival rate of afforestation

but also promote the growth and development of seedlings

accelerate the pace of forestation

and improve the stand quality

and ultimately achieve the goal of improving the environment of the Beijing City.