Summany on Breeding Techniques for Exotic Pines

This paper reviewed the evaluation factors of seedling quality and summarized the experimental results of several growing seedling techniques.Size and weighth of seed are related to germination speed.The seedlings which early germinate have the advantage of growth space on seedbed.Application of large seeds could improve quality of seedling.The suitable density of seedling is 110～140 plants per m 2.Cutting roots of seedling could improve the quality of root system and structure of seedling and greatly increase the survival rate of forestation.This paper proposed the techniques system for breeding fine seedlings of exotic pines.