论文部分内容阅读
一、前言桉树是属于桃金娘科(Myrtaceae)的常绿亚热带木本植物,其经济价值很高,生长异常迅速,为我国华南地区重要的造林树种之一。根据苏联试验的结果,桉树虽然可以用扦揷法来繁殖,但其揷穗的生根部分率很低(8%以下)。因此,桉树通常还是采用播种育苗进行造林。种子是育苗造林的基本材料,其品质的好坏是育苗造林的成败关键。因而在育苗造林之先,不仅需要研究种子的品质,而且需要改进和提高林木种子的品质,为培育良材而创造优越的条件。为此,我们对桉树的一切特征,及其与外界环境的关系进行了物候观测。
I. Introduction Eucalyptus is an evergreen and subtropical woody plant belonging to the Myrtaceae family. Its economic value is very high and its growth is extremely rapid. It is one of the important afforestation species in southern China. According to the results of the Soviet experiment, although Eucalyptus can propagate by means of skewer method, its rooting rate of spike is very low (less than 8%). Therefore, eucalyptus is usually planted seedlings for afforestation. Seed is the basic material nursery afforestation, the quality of its success or failure is the key to nursery afforestation. Therefore, before planting seedlings afforestation, not only need to study the quality of the seeds, but also need to improve and improve the quality of forest seed, in order to cultivate good material and create superior conditions. To this end, we conducted a phenological observation of all the characteristics of eucalyptus and its relationship with the external environment.