J4 ›› 2011, Vol. 46 ›› Issue (11): 8-11.

• Articles • Previous Articles     Next Articles

Analysis and evaluation of 21 kinds of elm variations population diversity

MU De-yu1, WANG Qiang2, JI Wen-li1*   

  1. 1. College of Forestry, Northwest A & F University, Yangling 712100, Shaanxi, China;
    2. Shandong Academy of Forestry Science, Jinan 250014, Shandong, China
  • Received:2011-03-25 Online:2011-11-20 Published:2011-11-30


Based on the investigation of 21 kinds of two-year-old elm variations, analysis of variance (ANOVA), contrastive analysis and principal component analysis (PCA) methods were applied to investigate their growth characteristics. The results demonstrated significant differences among elm’s diameter at breast height (DBH), height, crown height and crown diameter. The first two principal components explained 89.24% of the variance and properly described the characters of the total data. Based on the PCA results, we divided the 21 kinds of elm variations into 4 groups and discussed their application potentialities. This work determined the different elm variations’ characteristics and gave an example to assess plant growth.

Key words: Ulmus pumila clones; difference; analysis and evaluation

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