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利用 ＥD-１２０ Ｔ电子密度计测定了美洲黑杨（Ｐｏｐｕｌｕｓ ｄｅｌｔｏｉｄｅｓ Ｂａｒｔｒ． ｃｖ．’Ｌｕｘ’（Ｉ－６９／５５））×欧美杨（Ｐ． ｅｕｒａｍｅｒｉｃａｎａ ｃｖ． Ｉ－４５）Ｆ1 ９１个新无性系的苗期气干材密度。方差分析结果表明91个无性系的气干材密度存在极显著差异，遗传分析结果表明苗期气干材密度受中等强度的遗传控制。
The 91 new clones of Populus deltoides Bartr. Cv.’Lux ’(I-69/55) × P. euramericana cv. I-45 F1 were determined by ED-120 T electronic densitometer Seedling air dry material density. Analysis of variance showed that there was a significant difference in air-dried wood density among 91 clones. Genetic analysis indicated that air-dried wood density at seedling stage was controlled by medium-intensity.