Growth Regularityof Acer davidii in Qingyuan of Zhejiang

Investigations were conducted on sample plots with Acer davidiias dominant tree at mixed forest of evergreen and deciduous forest in Qingyuan of Zhejiang province in December of 2013. Stem analysis of the highest A. davidii treeshowed that it was 32-year, withslow growth at the early and later stage of the life, quick growth at 10-25-year, the best tending period was before 10-year.Current annual increment of volume increased with age, but the mean one did not top at 32-year. The models for height growth, DBH and volume was H=0.551-0.003a+ 0.595a2(R2=0.989), DBH=-0.471+ 0.318a+ 0.027a2-0.001a3(R2=1.000), V=0.005-0.002a+ 3.08×10-6a3(R2=0.999).