plus-tree

基本解释

Preliminary analysis on genetics of phenotype measuration of plus tree of Ulmus pumita Linn.
白榆优树表型测定的遗传学初步分析。
Preliminary Selection of Superior Families and Plus Tree on Platanus occidentalis L.
一球悬铃木优良家系及优良单株的选择。
Title： Preliminary analysis on genetics of phenotype measuration of plus tree of Ulmus pumita Linn.
关键词：白榆;优树;遗传参数;通径分析;直接影响;间接影响
Then such plus tree" s cold tolerant abilities have been assessed using electricity-conductivity methold.
为合理开发利用、保存桉树基因资源及遗传改良提供科学依据。
By the experiment, we can draw a conclusion that the cadastral vector data transformation based on B plus tree index is an efficient method and has a bright future.
实验表明，基于B+树索引的数据转换方法，可大幅度提高数据转换的效率，是实现数据共享有效可行的、很有前景的一种方案。