桂北速生桉无性系栽培试验

对桂北全州县咸水镇种植的尾赤桉、尾巨桉等6个速生桉无性系的生长表现、寒害状况进行了调查分析，结果表明：不同速生桉无性系间生长差异显著，以无性系3（尾巨桉）、5（尾巨桉）、6（尾赤桉）3个无性系号生长最好，1号（柳窿桉）无性系生长最差。冻害是检验速生桉无性系能否适应的关键指标，所种植的速生桉无性系受冻严重，在冰雪袭击下所有试验树木均被全部压断，部分树木还被冻死而不能萌芽。类似全州县成水镇的气候条件不适宜种植尾巨桉、尾叶桉、柳窿桉等速生桉无性系。

Cultivation Experiment of Fast-growing Eucalypt Clones in Northern Guangxi

The results of growths and cold injuries of 6 fast - growing eucalyptus clones of E. urophylla x E. camahhdensis, E. urophylla × E.grandis, etc, grown in Xianshui, Quanzhou of northern Guangxi showed that there were significant differences in growths of 6 eucalyptus clones. Among the clones, growths of No. 3 （E. grandis x E. urophylla）, No. 5 （E. grandis x E. urophylla） and No. 6 （E. urophyUa × E. camaldulensis ） were better, while that of No. 1 （E. saligna × E. exserta ） was the worst. Freezing injury was a critical index to test the adaptability of fast - growing eucalyptus clones. For all clones, their freezing injury was serious and trees were all pressed to break by the attack of wind and snow, moreover, part of trees were dead from cold injury and lost the ability to sprout. It was clear that the climate conditions of areas similar to that of Xianshui of Quanzhou was unsuitable for the planting of E. urophylla x E. grandis, E. urophylla , E. saligna × E. exserta , etc.