A Study On the Introduction of Rare Endangered Tree Species in Tropics and southern Subtropics

After 14-year's collection and culture of introduced species,some 83 rare en-dangered species of 63 genera and 38 families in China's tropics and southern subtropics havebeen introduced,accounting for 23.4% of China's protected species and 67.4% of those inGuangxi Province. Experiments of sowing and cutting etc. on 30 protected species have beenconducted,and large numbers of seedlings have been successfully propagated. Observationson phenology phase,growth increment and adaptability etc.on 34 species have been carriedout. Besides,46 hm2 introduction-reserve of germ-plasm resource has been set up.