尾叶桉种源家系生长性状变异分析与早期评价

对2.5 a生尾叶桉26个种源194个家系测定林进行调查结果表明，生长量最大的种源为20687号，其树高、胸径、材积平均值分别为10.41 m、10.43 cm、0.040 64 m3，分别是种源群体均值的111.10%、114.36%、135.60%。生长量最大的家系是89号，其平均单株胸径、树高、高径比和材积分别为10.61 cm、10.30 m、0.99和0.042 08 m3，分别是群体均值的118.28%、110.28%、95.19%、143.47%。通过综合权重评分法共筛选出来自12个种源的36个早期表现较优良的尾叶桉家系。

Growth Traits Variation Analysis and Early Evaluation of Eucalyptus urophylla Provenance and Family

The growth traits of the 2.5 years old Eucalyptus urophylla stand, which were planted by the 194 families from 26 provenances, were investigated. The results showed that the largest growth of all provenances was No.20687, with the average value of the tree height, DBH(diameter at breast height), and volume were 10.41 m, 10.43 cm, 0.040 64 m3, respectively, and which were 111.10%, 114.36%, 136.60% of the population mean, respectively. The largest growth of the families was NO.89, belong to No.14532 provenance, with the average value of DBH, tree height, height diameter ratio and volume of individual were 10.61 cm, 10.30 m, 0.99 and 0.042 08 m3, respectively, and which were 118.28%, 110.28%, 95.19%, 143.47% of population mean, respectively. Through the method of synthetic weighted mark, 36 Eucalyptus urophylla families come from 12 provenances were selected as superior families.