The project adopted out test-tube rooting instead of inside test-tube rooting. The method unites rooting and seedling stress. saving 20 days to root inside test-tube and one third of the seeding cultivation cost.

• 本项目技术路线改进后，将试管苗瓶内生根改为瓶外生根，使生根和炼苗过程合二为一，节省了瓶内生根时间20天，降低育苗成本费用约三分之一。