欧美杨优良无性系选择

Selection on the Superior Clones of Populus euramericana

经过5年欧美杨优良无性系选育研究,综合生长性状及独立淘汰法,初步选择出适于吉林省中东部河流冲积平地和四旁绿化造林的欧美杨优良无性系为N2、N12。平均单株材积分别是对照的414.9%和398.5%;最大单株树高、胸径分别为7.80m和7.6 cm,在造林地表现出明显的生长优势。

Study on selection and reproduction afforestation technology of superior clones of Populus after 5 years. The introduction of the majority of clones of Populus had been adapted to environmental conditions and grow well. By implying the methods of general growth properties and independent elimination the superior clones N2 and NI2 had been preliminary selected for the eastern part of the river alluvial plains and four - side green afforestation of Jilin province. The average stem volume per plant were 414. 9% and 398. 5% of the control; The height and diameter of the largest single plant were 7. 8m and 7.6cm respectively. The clean growth advantage had been showed in afforestation land.