论文部分内容阅读
按树是桃金娘科按树属(Eucalyptus)的总称,别名“有加利”。按树种间极易杂交,形态变异大,种类繁多,全世界有按树六百多种,大多数原产于澳洲,是澳大利亚植被构成的主要树种。按树是世界著名的速生树种,适应性强,轮伐期较短,经济价值高,用途十分广泛。按树自一七七九年发现以来,世界各国竞相引种(目前已有近百个国家引种),面积约占世界人工林的五分之一,已成为世界性造林树种。
The tree is a generic term for the genus Mytiana (Eucalyptus), with the alias “Galli.” According to inter-species easily hybridization, morphological variation, a wide variety, there are more than 600 species of trees in the world, most native to Australia, is the main species of vegetation in Australia. According to the tree is a world-famous fast-growing tree species, adaptability, short rotation, high economic value, uses a very wide range. Since the tree was discovered in 1779, various countries in the world have been competing to introduce them (nearly 100 countries have introduced them now), accounting for about one-fifth of the world’s plantation and have become afforestation species worldwide.