摘要
分别以蓝桉、直干桉5月生和10月生实生苗为参试苗木,测定其苗高和地径生长指标,分析同树种同苗龄苗木个体间的生长差异,采用标准差法确定超级苗初选标准,分析超级苗的入选率及增量效果。结果表明:试验苗木具备进行超级苗选择的生长量基础,同树种同龄级苗木的苗高生长变异系数均大于地径生长变异系数,且同树种同龄级苗木苗高与地径均存在极显著正相关。试验苗木初选标准皆为苗木平均苗高加上2倍标准差。5月生蓝桉、10月生直干桉为其各自合适的超级苗选择年龄,且超级苗在生长量上具有较大的增量优势,选择效果明显。试验苗木高生长量指标在5月、10月生苗龄间皆存在较大的正相关关系,蓝桉、直干桉早期选择结果具有有效性和可行性。
The seedling height and ground diameter of 5 months and 10 months seedlings of Eucalyptus globules and E. maideni were determined, respectively. The growth difference of the same age seedlings was analyzed in the same species. The selection criteria for super seedlings of E. globules and E. maiden were severally researched through standard deviation method. The results show that it is equipped with the basis for the growth of super seedling selection of sample seedlings , furthermore, the variable coefficients of seedling height are greater than that of ground diameter at the same age in the same species seedlings and there are significant positive correlation between seedling height and ground diameter at the same age in the same species seedlings. The super seedling＇s selection criteria of sample seedlings is the average seedling height plus 2 times standard deviation. The appropriate seedling age of super seedling＇s selection about E. globules is 5 months and that of E. maiden is10 months. The super seedling＇s selection effect is very obvious because these selected super seedlings have a large incremental advantage. There is a significant positive correlation about height increment between the 5 months＇ and 10 months＇ seedling age of sample seedlings, so early selection of seedlings was effective and feasible about E. globules and E. maiden.
作者
王晓丽
杨再国
曹梦涵
曹子林
Wang Xiaoli;Yang Zaiguo;Cao Menghan;Cao Zilin(College of Forestry,Southwest Forestry Lniversity,Kunming Yunnan 650224,China;College of Ecology and Soil ＆ W＇ater Conservation,Southwest Forestry Lniversity,Kunming Yunnan 650224,China)
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2018年第4期89-93,共5页
Journal of Southwest Forestry University：Natural Sciences
基金
国家重点研发计划课题项目(2016YFD0600501)资助
关键词
蓝桉
直干桉
标准差法
苗期
超级苗
Eucalyptus globulus
Eucalyptus maideni
standard deviation method
seedling stage
super seedlings
