威信林场建成杉木第一代改良种子园杉木第一代改良种子园于去年底在威信国有林场坛厂林区建成。杉木是我国南方重要的速生丰产用材林造林树种。威信县是云南省重要的杉木产区，在全国杉木区划中处在中带西部。１９８０年，云南省林科院在威信林场八字山林区设点开展了全国... Weixin Forestry Center built the first generation of Chinese fir improved seed orchard The first generation of improved seed orchard at the end of last year Weixin state-owned forest farm altar forest built. Cunninghamia lanceolata is an important afforestation species for fast-growing and high-yield timber in southern China. Weixin County is an important cedar producing area in Yunnan Province. It is located in the middle of the belt in the national division of fir. In 1980, Yunnan Academy of Forestry in the Weixin forest Bazimu forest area set up a national ...