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对全同胞子代林、半同胞子代林、无性系测定林和实生种子园中选择杉木第二代种子国优树的方法分别进行了研究。对优树形质指标和数量指标提出了具体标准。并按要求实选合格优树46株，为我省营建杉木第二代种子园打下了基础。
The methods of selecting the second-generation seeds of Cunninghamia lanceolata from the same-sibling Dai Lin, semi-sibling Dai Lin, clonal determination forest and seed-from-seed garden were respectively studied. Proposed concrete criteria for the index of tree quality and quantity index. And according to the actual selection of excellent tree 46, for the construction of the province’s second generation of Chinese fir seed orchard laid the foundation.