东门桉树无性系抗风性比较研究

Comparative Study on Typhoon-resistance of The Eucalyptus Clones of Dongmen

对东门20个桉树无性系进行适应性、速生性及抗风性测定分析,并采用欧式最小距离法对2项风害相关指标进行聚类分析。结果表明:不同无性系间的保存率、生长量、风害率、风害指数等性状均存在极显著差异。DM17、DM14、DM1、DM13和DM7对环境适应能力相对较好,DM5、DM6、DM7和DM17表现出相对较强的速生性。通过聚类分析将20个无性系分成4个类群,以DM7、DM17、DM19对台风的抗性最强,DM8的抗风性最差,其他抗风性一般。

Twenty eucalyptus clones of Dongmen were tested for their adaptability, fast-growing, resistance to typhoon. Cluster analysis based on 2 indexes correlated with typhoon damage of 20 eucalyptus clones was made by Statistical Product and Service Solutions software according to minimum squared Euclidean distance （MSED）.The results showed that the survival rate, the growth, the typhoon damage rate and the index of the typhoon damage between clones were highly significant different. DM17, DM14, DM1, DM13 and DM7 had strong ability to adapt the environment, DM5, DM6, DM7 and DMI7 growed faster. The 20 clones could be clustered into 4 groups based on their resistances to typhoon, among them DM7, DM17 and DM19 were the strongest, DM8 was the weakest, while the other clones had medium resistance to typhoon damage. Combining the adaptability, fast growth, typhoon-resistance and the result of clustering analysis, DM7 and DM 17can be preliminary used as the fast growing and good typhoon-resistant eucalyptus clones in the Dongmen region.