论文部分内容阅读
对海口林场桉树基地2013年5月种植的亮果桉、蓝桉和直杆桉进行冻害调查与对比分析。结果表明,亮果桉受冻程度较轻,冻害指数相对较低,直杆桉与蓝桉受冻程度比较严重,冻害指数均大于60。经树高、地径和冻害级别的相关性分析,亮果桉、蓝桉和直杆桉均呈现极显著负相关,随着树高与地径的增加,桉树冻害级别降低。亮果桉较耐低温,在以后的造林中可以作为主要造林树种。
The eucalyptus urophylla, Eucalyptus grandis and eucalyptus urophylla planted in May 2013 in Eucalyptus base of Haikou Forest Farm were subjected to frost damage investigation and comparative analysis. The results showed that the eucalyptus urophylla had less degree of freezing, relatively lower frost damage index, and more serious freezing degree of eucalyptus globulus and blue eucalyptus. Eucalyptus, Eucalyptus and Eucalyptus globulus showed a significantly negative correlation with tree height, ground diameter and frost damage level. The frost damage level of Eucalyptus trees decreased with the increase of tree height and diameter. Eucalyptus is more resistant to low temperature, afforestation in the future can be used as the main afforestation species.