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杉木优良种源及其冻害苗造林效果分析

Analysis on Fine Provenances of Chinese Firand the Effect of Cultivation Using Freezing-injured Seedlings

  • 摘要: 通过两次全分布区和一次有限分布区杉木Cunninghamia lanceolata Lamb.(Hook.)种源试验,证实了种源间的树高、胸径、材积和结实等都存在明显的遗传变异1~4。以速生优质为目的,综合评选出一批优良种源,具有丰产稳产、适应性广、结实量低等优良特性。

     

    Abstract: A comparison experiment on the use of both normal and freezing-injured Chinese fir seedlings for cultivation was made. The result showed that the growth of the young stand,which was cultivated with freezing-injured seedlings,was not as good as the young stand,which was cultivated with normal ones in the first and second year,but they tended to be normal in the third year. In the sixth year,both of their growth speeds were synchronous.There was no significant difference between their tree height and DBH;There was obvious hereditary superiority in seedlings of different fine provenances,especially the fine provenance of Guizhou Jinping,which possessed the characteristics of fast-growing high wood quality and wide adaptability.

     

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