摘要
根据19株人工林优树周围的标准地每木实测数据,对小标准地和大树选优法作了比较;根据31株优树的选优结果,比较了1～5株大树选优法间的相关关系,大树法间相关都显著,但以3株法为最好,对“六五”和“七五”期间各地选择的3183株优树的数量指标作了比较,对不同种子区选优标准提出了意见。
Methods for the selection of plus trees with sample plots andcheck trees were compared on the basis of 19 sample plots. Comparisons of1-5 check trees with 31 plus trees were made. The correlation between the1-5 check trees methods was significant. The parameters of sample plotscould be estimated by using data of check trees while the 3 check treeswere the most efficient. Criteria of plus tree selection for each seed zonewere suggested according to the data of 3 183 plus trees selected in the 6thand 7th 'Five Year Plan'
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1992年第1期7-13,共7页
Journal of Beijing Forestry University
关键词
优树选择
油松
plus tree, methods of selection of plus trees, Pinus tabulae-formis Carr.
