1. Extend the growth period of crops and raise seedlings earlier through facilities to enable crops to enter the field for production earlier.
2. Save seeds and reduce seed costs. The seedbed management is finer, the environment is better than that of the field, and the seedling rate of seeds is higher than that of the field.
3. It is conducive to cultivating strong seedlings, the seedbed has good water and fertilizer conditions, and the seedlings grow well.
4. It saves land, the seedlings occupies a small area, and it can be carried out on the non-agricultural land through the substrate, which can use very little land to cultivate a large number of seedlings.
