A PRELIMINARY EVALUATION ON THE SITE SELECTION OF CHINESE FIR (CUNNINGHAMIA LANCEOLATA) SEED ORCHARD

Through the data analysis of 28 seed orchards for Chinese fir (Cunninghamia lanceolata) which located in six provinces in China,it has been found out that the seed trees grow in seed orchards in central region of distribution of this species and the clones initiated in this region are later flowering and have lower sowing quality of seeds in first several years of fruiting phase than the trees grow in seed orchard in northern region of distribution and the clones from northern one.Ten or more after grafting,the seed yield and sowing quality of former can catch up with later one.Excessive precipitation and raining date in lollening period and dry in seeds developing stage (July-October) in central region and longly dry season in south region of distribution seems prevent them from high-yield and good quality of seeds.It is recommended that the seed orchard of Chinese fir had better to establish in basicly adopting location to this species but un-central region.