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我国自六十年代开展以选择育种为中心的杉木遗传改良工作以来,已营建了一批无性系初级种子园。据一些地区的子代测定结果,用初级种子园的种子造林,平均材积增长率可达10—15％。我省建立杉木种子园的工作始于六十年代后期,迄今已选优树约60O株,建成和正在营建的无性系初级种子园共2000亩左右,但这些种子园的亲本材料大多尚未鉴定。
Since China started the genetic improvement of Cunninghamia lanceolata (Cunninghamia lanceolata), a center of selective breeding, in the 1960s, a number of climatic primary seed orchards have been built. According to the results of progeny determination in some areas, seedlings from primary seed orchard have been used for afforestation, and the average volume growth rate can reach 10-15%. The work of establishing a fir seed orchard in our province started in the late 1960s. So far, about 60,000 excellent trees have been selected. About 2,000 acres of primary seed orchards have been built or under construction. Most of the parental materials of these seed orchards have not been identified yet.