摘要
巨桉人工实生林胸径平均相差16．32cm，最大可达26．7cm，标准差变异幅度为2．5—6.1，平均为3．6，表明巨桉实生林林分胸径自然变异幅度较大。在四川巨桉4—10a生的人工林内，采用小标准地法，初步选择巨桉优良单株26株，其胸径是林分平均胸径的128％～192％．平均为153．2％。
In order to establish large-scale industrial plantation of Eucalypts grandis in Siehuan Province, it is important to select superior＇ individuals with good virtue in both wood production and stress resistance for further cuhivars breeding. A great variation in DBH growth was found amnong individuals of Eucalypts grarutis. The average variation of DBH reached 16.32cm, with the biggest variation 26.7cm, and the average standard deviation 3.6cm. 26 plus trees were selected from several 4 - 10 a plantations of Eucalypts grandis using the method of small sample plot. Compared with stand average, the superior ratio of DBH growth of plus trees were 128% - 192%, with a average of 153.2%.
出处
《林业科技开发》
2006年第6期47-49,共3页
China Forestry Science and Technology
基金
四川省林业科技"先导计划"项目(编号:推05-7)
关键词
巨桉
优良单株
自然变异
初选
Eucwalypts grandis
Excellent individual-tree
Natural variation
Preliminary selection
