17个邓恩桉种源引种试验初报

摘要

Growth and adaptability of 17 Eucalyptus Dunnii provenances were investigated and analyzed in the first 7 years, the results showed that provenances of No. 17923 achieved the highest volume（172.4442 m3 hm -2）, that of No. 17915 and No. 17918 all exceeded 160 m3 hm -2, and that of No .20670 was the lowest but also achieved 119.9361 m3 hm -2. Though each provenance growth was different, but in general the growth of height and diameter were almost the same. All provenances growed fastest in the third year; all prove- nances could adapt to the climate of low or high temperature and drought inYongzhou City, and they had strong ability to resist pests.%通过对17个邓恩桉种源在引种后其前7 a生长量和适应性进行调查和分析,结果表明：7年生材积最大的17923号达到了172.4442 m3.hm-2;其次是17915和17918号,均超过了160 m3.hm-2;最小的20670号也达到了119.9361 m3.hm-2。各种源的生长虽然各有差异,但总的来说,高、径增长情况基本一致,所有的种源号均在第3年增长得最快;17个种源均能适应永州市的气候,能抵抗当地的低温冰冻和高温干旱天气,抗病虫害能力强。