A Preliminary Report on Progeny Forest Experiment of Different Seed Production Stand of Pinus yunnanensis in Malong County,Yunnan Province

Taking 3 kinds of seeds from seed production stand of Pinus yunnanensis constructed by the Ministry and Province on Baimahe Forest Farm, Guyong Forest Farm and Baoshan Forest Farm as test units and installing 2 commondity seeds of Malong and the other parts of the whole Province as control, the comparing experiment on progeny test of progeny forest in Northeast of Yunnan has been done.After observation and analysis on the young forest of 5 years, the results show that the seed production stand of Pinus yunnanensis has relatively great genetic realized gain.The height realized gain of seed production stands on Baimahe Forest Farm, Guyong Forest Farm and Baoshan Forest Farm are 49.85%, -12.62% and 11.35%, and those of ground diameter realized gain are 46.01%, 36.97% and 42.02% respectively.