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柏类引种试验研究

Study on the Introduction of Cupressus Species

  • 摘要: 对柏类4个树种墨西哥柏、绿干柏、垂柏、巨柏共12个种源的引种结果表明,不同树种和种源树高、胸径增长最大年份分别出现在造林后第4年和第5年;造林后10a,各树种和不同种源树高、胸径生长差异显着,以墨西哥柏3、2、6、7号种源生长最快,树高、胸径平均值在10.4m和15.2cm以上,其中3号种源树高最大,为11.09m,6号种源胸径最大,为16.9cm,分别比垂柏增加9.9%和27.1%.各树种和种源都有倒伏现象,倒伏程度与造林树种、林龄、立地有关。

     

    Abstract: A species/provenance trial was conducted with 4 species,Cupressus lusitanica,C.arizonica,C.funebris and C.giganta,and 12 provenances of them.The largest height increment and DBH (diameter at breast height) increment for all species and provenances occurred respectively at the 4th and 5th years after planting.There were significant differences in height and DBH among species and provenances 10 years after planting.Provenances 3,2,6,7 of C.lusitanica displayed the best growth with average height and DBH above 10.4 m and 15.2 cm respectively.Provenance 3 showed the largest height (11.09 m)and provenace 6 showed the largest DBH (16.9 cm),9.9% and 27.1% repectively larger than the height and DBH of C.funebris.Falling-down by wind occurred to all species and provenances.It relates to species,age and site conditions.

     

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