Genetic Variation of Geographical Provenance and Nonage Selection of Fokienia hodginsii

There were obvious differences in the height and diameter growth of Fokienia hodginsii , a young forest 4～5 years old in 17 geographical provenances, and the difference in the diameter was more obvious than in the height. Between the provenances and environment of interaction, the rank of height and diameter growth volume productivity was mountain middle mountain area hill. The rules of geographic variation of provenances on young growth properties change mostly by the latitude. Based on the selection standard on the genetic gain exceeded (15%) of average provenances, 3 superior provenances were tentatively selected with the genetic gain of 17.38%～21.05% respectively and could be afforested in different biological environments. The fastest growth rate of height, diameter and volume of provenances was in the young forest of 4～5 years old, and it showed that the stability in growth of nonage selection.