杨树大径级工业用材林适生品种选择

为选择适宜培育杨树大径级工业用材林的优良品种,以生产中广泛应用和新选育的52个黑杨派杨树无性系为材料,进行多点、多年造林试验,对生长量、形质指标、木材材性、性状遗传、抗虫性、抗逆性等性状,采用单性状评价、多性状综合选择.结果表明,优良无性系的材积生长量超过对照I--69杨13.8%~82.0%,各无性系间在生长、干形、冠形、木材材性、抗病虫性、抗逆性等方面存在广泛的遗传变异,且性状受强度或中等遗传控制;20世纪90年代广泛应用的品种以50号、卡帕茨、中林46最好,其次为中林14I、--69、中林28、中林23,以I--214、露易莎、西玛杨较差;20世纪90年代中后期新选育的杨树品种以L35I、--107、L323、L324最好,其次为T26、T66I、--102、中菏1号.

Selecting poplar varieties for large-size log production plantations.

Based on the testing of multipoint in many years,characters including growth rate,indices for stem form and crown structure,wood property,heritability of character,pest resistance,stress tolerance of 52 poplar clones in Section Aigerios were measured and analyzed.Using both single and multicharacter evaluation approaches,poplar varieties for large-size log production plantations were screened. The results showed that the volume growth of superior clones was 13.8%～82.0% higher than that of the control(I-69).Wide range of heritability of characters,such as growth rate,stem form,crown structure,wood property,disease and pest resistance,and stress tolerance among the tested clones,were observed,and these traits had been genetically controlled at medium or high level.Among the poplar clones widely employed in 1990s,No.50,Carppaccio,and Zhonglin 46 were the best,Zhonglin 14,I-69,28 and Zhonglin 23 followed,and I-214,Luisa Avanzo,Cima were the worst;whilst among the poplar clones employed in later 1990s,L35,I-107,L323 and L324 were the best,and followed by T26,T66,I-102,and Zhonghe 1 for the production of large-size log.