【摘要】 良种是定向培育杉木大径材的物质基础 通过对12个产地的65个杉木优良家系进行造林对比试验, 以福建邵武的杉木优良家系为对照 结果表明: 选用杉木优良家系培育大径材,可以缩短杉木大径材培育年限, 18年生已接近或达到大径材培养标准, 同时提高林分产量和大径材出材量; 分析了不同产地和不同家系之间的生长差异, 11个产地的胸径、树高、单株材积生长优于对照, 胸径生长都达到培育大径材标准; 筛选出50个速生丰产、遗传增益高的杉木优良家系更多还原

【Abstract】 Fine varieties are basis of cultivating orientedly big-diameter timber of Cunninghamia lanceolata.Compared with 65 elite families in 12 original areas,big-diameter-oriented cultivation techniques of Cunninghamia lanceolata were studied.The results revealed that cultivating time of big-diameter timber of Cunninghamia lanceolata would be reduced in 18 years old,and high timber yield and output of timber per unit area would be attained through selecting elite families. This paper ascertained the range of original area with high yield and selected a group of elite families with high genetic gains and rapid volume growth.更多还原