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杉木初级种子园是用表型优树建立的。各无性系遗传素质如何?增益多少?都是科研工作中的新课题。为了解答这些问题,探讨提高选择育种效果的程序和方法,并为建立高一级种子园准备繁殖材料,从1976年起,陆续对排牙山林场1973年用45个无性系建立的种子园,开展子代测定,现将测定结果综述如后。材料和方法种子园无性系子代苗期测定主要于1977～1979年间进行,试验材料为母树嫁
Chinese fir primary seed orchard is established by phenotypic tree. What is the genetic quality of clones and what is the gain? All are new topics in scientific research. In order to answer these questions, to explore the procedure and method of improving the effect of selective breeding and to prepare propagation materials for establishing a higher seed orchard, from 1976 onwards, one after another to the seed orchard set up by 45 clones in the Yadanshan Forest Farm in 1973, Carry out offspring determination, the measurement results are summarized as follows. MATERIALS AND METHODS Seeds of clonal seedlings of seed orchard were mainly determined during the period from 1977 to 1979 with the test material being the mother tree