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按常规培育杉木胸径３０ｃｍ以上的大径材，通常需要４０年以上的时间，远远不能满足市场对大径材的需求。我们从马园种子园杉木母树的快速生长，总结出了一条依靠科技进步，培育杉木大径材的快速之道，即１９林龄的杉木平均胸径达３０８５ｃｍ，树高１６９ｍ，每亩立木蓄积１６７４４ｍ３，最大单株材积达１４６ｍ３，超过了湖南省速生丰产林的标准，且投入和产出比可望达到１３１，效益极为可观。
According to the conventional cultivation of large-diameter timber with a diameter of more than 30cm, it usually takes more than 40 years to meet the market demand for large-diameter timber. From the rapid growth of the fir tree in the seed orchard of Makuen Garden, we summed up a quick way to relying on scientific and technological progress to cultivate the large-diameter fir material. The 19-year-old Chinese fir has an average diameter at breast height of 30.85cm and a height of 16.9m The mu stocking volume is 16.744m3 and the largest single plant volume is 146m3, which surpasses the standard of fast-growing and high-yielding forest in Hunan Province. The input-output ratio is expected to reach 131, and the benefits are extremely impressive.