摘要 | 对31个麻栎(Quercus acutissima Carr.)种源及20个麻栎单株(广西融水)1年生播种苗的生长状况及其与种源地地理位置和气候因子的相关性进行了分析。结果表明,不同种源播种苗的株高为53.40~121.16 cm,从5月份至9月份呈匀速增长;地径为7.62~14.65 mm,生长高峰期在7月中旬至9月中旬;叶面积指数为9.6~29.4,平均达16.1。20个单株播种苗的株高为78.49~101.23 cm,地径为8.87~10.48 mm,叶面积指数为7.6~17.9。不同种源麻栎和同一种源不同单株间的株高、地径和叶面积指数均存在极显著差异(P<0.01)。播种苗的生长状况与种源地的纬度呈极显著负相关;与种源地的年均降水量和年均温度有一定的相关性。通过聚类分析可将31个麻栎种源分为3类,江西上饶、浙江龙泉、浙江富阳、浙江开化、贵州三穗和贵州黄平等6个种源为优良种源。 |
Abstract | The growth status of one-year-old seedlings of Quercus acutissima Carr. from thirty-one provenances and twenty individuals from Rongshuiin Guangxiand the correlations of the growth characters with geographical and climatic factors of locations were analyzed. The results show that the seedling height of different provenances is 53.40- 121.16cm and the growing speed is uniform. from May to September. The ground diameter is 7.62- 14.65mm and the growth peak is from the middle ten days of July to the middle ten days of September. The leaf are aindex (LAI)is 9.6- 29.4and the average is 16.1.The height, ground diameter and LAI of seedlings of twenty individuals are 78.49- 101.23cm,8.87- 10. 48mm and 7. 6- 17. 9,respectively.There are highly significant differences of height,ground diameter and LAI of Q. acutissima seedlings among different provenances and individuals (P<0.01).The growth characters of seedling shave a highly significant negative correlation with the latitude of locations and some correlations with mean annual precipitation and mean annual temperature of locations. Thirty-one provenances can bedivided into three groups according to the cluster analysis .It can be concluded that the provenances of Shangrao of Jiangxi, Longquan, Fuyang and Kaihua of Zhejiang, Sansuiand Huangping of Guizhou are superior provenances. |
关键词 | 麻栎; 种源; 叶面积指数(LAI); 株高; 地径; 聚类分析; |
Key words | Quercus acutissima Carr.; provenance; leaf area index (LAI); height; ground diameter; cluster analysis |
作者 | 王 标1,2,虞木奎2,王 臣2,方炎明1 |
所在单位 | 1.南京林业大学森林资源与环境学院,江苏南京210037; 2.中国林业科学研究院亚热带林业研究所,浙江富阳311400 |
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基金项目 | 国家公益性行业科研专项(200704034); 国家科学技术部“十一五”科技支撑计划项目(2006BAD03A160101) |