CAJ | 학술논문

采用大田挖掘法，对20个杨树无性系的根系特征及地上与地下部分的相关关系进行了研究。结果表明，20个杨树无性系的根系主要集中在0～50 cm土层中，根系以水平根为主，垂直根基本消失，不定根与地面的夹角较小，基本保持水平。中驻1号、NL351、T26和中驻6号的不定根总长度较大，中驻1号、中驻6号、W07和I107的不定根总数量较多，基部直径在2 cm以下的不定根占不定根总数量的60％～80％。从地上和地下部分的生长情况来看，树高、冠幅、地上部干重、根重和根长存在显著相关关系；20个杨树无性系的根冠比在0.23～0.45的范围之内；单位地上部所具有的根长差异性较大，最大的为T26，最小的为中菏1号；根系生理吸收效率与根冠比、单位地上部所具有的根长呈负相关关系，即根系冗余现象。通过聚类分析，在相似系数为1.3时，可将20个杨树无性系分为3类6个亚类。研究结果可为杨树优良无性系的进一步选育和抚育管理提供理论依据。
채용대전알굴법，대20개양수무성계적근계특정급지상여지하부분적상관관계진행료연구。결과표명，20개양수무성계적근계주요집중재0～50 cm토층중，근계이수평근위주，수직근기본소실，불정근여지면적협각교소，기본보지수평。중주1호、NL351、T26화중주6호적불정근총장도교대，중주1호、중주6호、W07화I107적불정근총수량교다，기부직경재2 cm이하적불정근점불정근총수량적60％～80％。종지상화지하부분적생장정황래간，수고、관폭、지상부간중、근중화근장존재현저상관관계；20개양수무성계적근관비재0.23～0.45적범위지내；단위지상부소구유적근장차이성교대，최대적위T26，최소적위중하1호；근계생리흡수효솔여근관비、단위지상부소구유적근장정부상관관계，즉근계용여현상。통과취류분석，재상사계수위1.3시，가장20개양수무성계분위3류6개아류。연구결과가위양수우량무성계적진일보선육화무육관리제공이론의거。
A field experiment was conducted to investigate the roots characteristics and the correlations between the aboveground and underground parts of 20 Populus clones.The results showed that their root systems are mainly concen-trated in 0~50 cm soil layer, the root system is given priority to with horizontal root, vertical root basic disappearance, adventitious roots of small Angle, with the ground close to the level.Zhongzhu-1, NL-351, T-26 and zhongzhu-6 had larger total length of adventitious roots and zhongzhu-1, zhongzhu-6, NL-351 and I-107 adventitious roots in the total quantity is more which the ground diameter under 2 cm accounted for 60%~80%of total number of adventitious roots. The growth indexes between the aerial and underground parts, exists significant correlation relationship, such as height, crown diameter, root weight and root length.The root/shoot ratio ranged from 0.23 to 0.45.The root length per unit shoot weight differences is bigger, the biggest for T26, the smallest for zhonghe-1.The root absorption efficiency was significantly negative correlated with the root/shoot ratio and the root length per unit shoot weigh, known as root redun-dancy.By cluster analysis, 20 Populus clones were divided into 3 groups and 6 categories at similarity coefficient 1.3. The results may provide a theoretical basis for further breeding improved clones of poplar and management.