The present situation is that the application rate is increasing gradually, and the advantage is that the growth environment is controllable.

1, Nanjing adopted container seedling raising for a short time, and it only took 10 years to popularize afforestation in a large area on individual tree species, but the development momentum was very strong. The State Science and Technology Commission listed this as a continuous key problem in the Seventh Five-Year Plan, the Eighth Five-Year Plan and the Ninth Five-Year Plan.

2. Container seedling raising can be carried out in a controllable environment, including soil quality, moisture, temperature, light and nutrition.