摘要
杉木作为南方主要用材树种 ,由于连作使得杉木严重退化已成为公认事实 ,解决此问题的方法之一是采用优良无性系造林 .采用苗期选优法进行无性系选择 ,田间设计采用改良对比法和随机区组法 ,对湖南省金洞林场杉木优良无性系进行了选择研究 .结果表明 ,杉木无性系选择年龄应在中龄 。
China fir is a main commercial wood tree species in the South. Owing to continous cropping, it is generally recognized that China fir is degenerating seriously. Many forestry scientists study China fir on different points in order to stop China fir from degeneratng deeply. This paper studies China fir in the respect of superior clone selection during seedling stage. We adopt the ameliorating comparision and random regional group method in the field design, investigate every tree in the experimental field many times, and make a statistical analysis of the data from 33 000 groups. The results show that both the height and diameter of the superior clone of China fir are obviously greater than those of the control.
出处
《中南林学院学报》
CSCD
2000年第2期57-61,共5页
Journal of Central South Forestry University
基金
湖南省教委科研项目! (编号为 97B13 8)
湖南省林业厅科研项目! (编号为 98-2 0 3 )共同资助
关键词
杉木
无性系
选择育种
湖南
China fir
superior clone
selective breeding
