The Regional Selection and Its Effectiveness of Chinese Fir Fine Families in Huangshan Area

The seeds of 137 Chinese Fir fine families selected through progeny test were collected from ten seed orchards in the southern provinces of our country. Then the seedlings and forests cultivated by these seeds were observed in this study. 5~7 years after having been planted, 35 fast-growing and strong-resistance families were selected, which are suited for use in the northern margin of mid-subtropical region and north-subtropical region. It has an average gain of 19.4% for height and 24.1% for DBH at the age of seven years, as compared with checks of mixed seeds from local orchard. The study also revealed that 5% of volume genetic gain could be obtained again in Huangshan area if we make a further regional selection of these fine families.