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青钱柳不同种源幼树生长特性及叶片性状差异分析

Analysis of Growth and Leaf Characteristics of Different Provenances of Cyclocarya paliurus Saplings

  • 摘要: 为进行青钱柳优良种源的早期选择,对四川沐川、贵州黎平、湖南东安、湖北五峰和江西修水5个种源的青钱柳幼树生长特性和叶片性状进行分析。结果表明:青钱柳不同种源间幼树生长特性各指标均达到显著水平;幼树的小叶长度、小叶宽度、小叶面积的差异等均达到了显著水平,但叶片厚度和复叶叶柄粗度和复叶叶柄长度差异不显著。对不同种源青钱柳幼树的生长和叶片指标进行了相关性分析和主成分分析,结果表明:树高、地径、最长侧枝长度、最长侧枝粗度、侧枝数量间存在显著正相关关系;侧枝数量、小叶长度、小叶宽度、小叶面积间存在显著正相关关系;小叶长度、小叶宽度、小叶面积分别与复叶叶柄长度、复叶叶柄宽度显著正相关。通过主成分分析,前两个主成分的累积方差贡献率为97.18%。经综合评价,不同种源青钱柳幼树综合得分最高的为四川沐川、贵州黎平种源。

     

    Abstract: For early selection of the excellent provenances of Cyclocarya paliurus,analysis was made of the growth characteristics and leaf traits of five saplings,which were from Muchuan of Sichuan,Liping of Guizhou,Dong'an of Hunan,Wufeng of Hubei and Xiushui of Jiangxi.The results showed that there were significant differences in growth characteristics among different provenances of C. paliurus saplings.And there were significant differences in leaflet length,width and area,with the exception of leaf thickness,compound leaf petiole diameter and compound leaf petiole length.The correlation analysis and principal component analysis method were applied to evaluate the growth characteristics and leaf traits of C. paliurus saplings. The results showed that there was an extremely significant positive correlation among the height of tree,the ground diameter and number of sub-branch,the length and diameter of the longest lateral branch;There was an extremely significant positive correlation among the number of sub-branch and leaflet area,length and width;The leaflet length and width,and area were respectively correlated positively with the compound leaf petiole diameter and compound leaf petiole length. The cumulative variance proportion of the first two principal components was 97.18%.According to comprehensive evaluation,the higher comprehensive scores of C. paliurus saplings among different provenances were from Muchuan of Sichuan and Liping of Guizhou.

     

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