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从13年生的杉木单亲子代林中进行优良家系、优良单株的联合选择。结果表明:杉木第一轮回选择的效益明显,其中混合选择的材积遗传增益为15.38%;家系选择的增益为12.62%;优良家系内优良单株选择的增益为23.04%。选择到8棵优良单株,可用以营建第二代种子园。采用疏伐改建为母树林混合选择,其子代的树高、胸径和材积生长量与对照后代差异不大。
From the 13-year-old Chinese fir single-parent forest excellent families, excellent single plant joint choice. The results showed that the efficiency of the first round of Chinese fir selection was obvious. The genetic gain of the mixed selection was 15.38%, that of the selected family was 12.62%, and that of the good selection of the fine line was 23.04%. Choose to eight excellent single plant, can be used to build second-generation seed orchard. Using thinning and rebuilding as the mixed selection of mother trees, the tree height, DBH and volume growth of its offspring are not significantly different from the control.