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.