Summarization on High Seed Yield Technology for Zhejiang Chinese Fir Seed Orchards

A series of tests was conducted for five years to go further into the technology of raising per unit yield and improving seed quality in Zhejiang Chinese fir seed orchards. Investigations were conducted in these primary seed orchards on its management and adminstration level,and its year yield variation.And the biological and environmental factors were also monitored and collected systematically that would influence the production of Chinese fir seed orchards. The high seed yield technology was thus formed based on above mentioned work. The paper reaveled that the tree parents selection and dispose,and the site selection were the base for high seed yield and superior quality in Chinese fir seed orchard,that the cultivation of stock plants and artificial supplementary pollination were the key factors,and that the fertilization,tree density management,control of insect and disease etc. were the promise of seed production.