【摘要】 对辽宁西部地区 15年生 12个杨树无性系的丰产林 ,从树高、胸径及材积方面进行了对比研究 ,并对个别年份的生长因子进行了方差分析 ,从而进行优良无性系品种选择研究。结果表明 :4 8号杨、6 4号杨适于作为纸浆林品种进行营造 ,5年生时 ,其林分平均树高分别为 13.82和 14 .0 1m ,平均胸径分别为 16 .96和 17.2 3cm ,平均单株材积分别为 0 .15 5 7和 0 .16 2 7m3 。对于营造丰产林 ,4 7号杨、4 8号杨、6 4号杨生长较好 ,且成熟较早 ,适合栽植。无论培育纸浆材还是培育杨树速生丰产林 ,4 7号杨、4 8号杨和 6 4号杨都是比较优良的无性系。更多还原

【Abstract】 Fifteen years old high-yield stands of twelve poplar clones from abroad were studied in west Liaoning Province. The DBH, height and volume in different clones were investigated, and the variances were also calculated. The result showed that clone-48 (P.×euramicana cv"Ng3014") and clone-64 (P.×euramicana cv"DN3016") were suitable to be used as pulp forest clones, and clone-47 (P.×euramicana cv"Agethe F"), clone-48(P.×euramicana cv"Ng3014") and clone-64 (P.×euramicana cv"DN3016") were suitable to be used as high-yield poplar clones. Meanwhile the quantitative maturity of different clones in high-yield forest was calculated.更多还原