尾叶桉优树选择标准研究

Criteria for Selecting Superior Trees of Eucalyptus urophylla

以7个种源的194个尾叶桉家系试验林为材料,初选尾叶桉优树48株,优势木240株。综合评定尾叶桉选优标准为胸径、树高、材积分别超过5株优势木均值的10%、13%、17%,超过林分平均木均值的13%、16%、25%;确定干形、分枝均匀度为优树选择时需要考虑的2个主要形质指标。

Based on 194 families of Eucalyptus urophylla from 27 provenances, 48 superior trees and 240 dominant trees were collected. Through the comprehensive assessment, E. urophylla superior trees selection criteria were as follows： DBH, tree height, volume exceeded that of 5 dominant trees 10%, I3%, 17%, respectively, and exceeded the stand average tree 13%, 16%, 25%, respectively. The stem form and branch score were determined as two important morphological index for superior trees selecting.