桉树原产澳洲及新几内亚等地,约五百余种,多数为速生之常绿大乔木。具有,生长迅速、适应性强、材质优良、用途广泛等特点。近百年来在热带,亚热带和地中海沿岸,已被九十多个国家大量引种,作为人工造林的主要树种。我国引种桉树,也有八十多年的历史,遍及华东、华中、西南十三个省市,引有价值种达二十多个,造林面积在五百万亩以上,已成为我国南方平原、低山丘陵和四旁绿化的主要造林树种之一。 无锡引种桉树,自一九五八年开始,由于树种选择不当,管理不周,几经失败。一九六四年后又陆续引进异心叶桉、赤桉、兰桉、大叶桉、细叶桉、野桉、拟灰桉、扁叶桉、斑皮桉、高山桉等桉种,也因遭到严重侵袭,大部枯顶或死亡。但亦有几种经受了寒冷的考验,保存下来,长成大树,开花结果,繁衍后代。例如,郊区军嶂林果场(现为柑桔试验场),六五年春引种的桉树行道树中,有二株异心叶桉,已从七○年开始结实。在大浮公社、马山公社和梅园等地,也有几种桉树(品种尚待鉴定)已孕蕾,可望结实。从一九七二年起,我们又用异心叶桉的种子进行育苗和栽培试验。现在可以肯定,异心叶桉在江苏无锡地区,能 Origin of eucalyptus Australia and New Guinea and other places, about 500 species, most of the evergreen tree evergreen. With, rapid growth, adaptability, material quality, wide range of uses and so on. In the past hundred years, it has been introduced in large quantities in over 90 countries on the tropical, subtropical and Mediterranean coasts as the main tree species for afforestation. China introduced eucalyptus, also has 80 years of history, throughout east, central and southwest 13 provinces and cities, the introduction of the value of more than 20 species, afforestation area of ​​5 million mu or more, has become China’s southern plains, low One of the main afforestation species afforesting hillsides and greening around. Introduction of eucalyptus in Wuxi, since 1958, due to improper selection of trees, poor management, after several failures. After 1964, Eucalyptus urophylla, Eucalyptus grandis, Eucalyptus globulus, Eucalyptus grandis, Eucalyptus urophylla, Eucalyptus urophylla, Eucalyptus globulus, Eucalyptus globulus, Eucryptopsis eucalyptus, Seriously hit, mostly dead or dead. But there are also a few who have survived the cold test, preserved them, grow into large trees, bear fruit and multiply their offspring. For example, in the suburbs, there are two strains of eucalyptus in different parts of the eucalyptus trees introduced in the Spring of 65. They have been strong since 1970. In Dafu commune, Mashan commune and plum garden and other places, there are also several kinds of eucalyptus (species yet to be identified) have pregnant bud, is expected to be strong. Since 1972, we have also used the seed of Eucalyptus urophylla for seedling and cultivation experiments. Now you can be sure, different heart Eucalyptus in Wuxi, Jiangsu Province, can