Field Performance of Eucalyptus Hybrids at Planalto da Conquista, Bahia, Brazil

ABSTRACT The present study was carried out with the objective of evaluating the field performance of six Eucalyptus clones, using seed-produced Eucalyptus urophylla as a reference. The experiment was conducted in the city of Vitória da Conquista, Bahia, Brazil. The plants were monitored monthly with diameter at ground level and height measurements taken up to nine months after planting. Diameter at breast height (DBH) and height measurements, as well as the biomass of all tree components and stem volumes were obtained 12 months after planting. VM058 and I-144 were the only clones that showed survival rates below 70%. Nevertheless, up to the age of 12 months and similar to the seed-produced E. urophylla , the VM058 clone was the genetic material that presented the most satisfactory production given the edaphoclimatic conditions of Vitória da Conquista, Bahia, Brazil.

摘要 本研究以种子繁殖的尾叶桉（Eucalyptus urophylla）为对照，旨在评估6个桉树无性系的田间表现。试验于巴西巴伊亚州维多利亚达孔基斯塔市开展。定植后前9个月内，每月对试验植株进行地径与株高的监测及测定。定植后12个月时，完成胸径（Diameter at Breast Height, DBH）、株高、植株各组分生物量及材积的测定。仅VM058与I-144两个无性系的存活率低于70%。但在巴西巴伊亚州维多利亚达孔基斯塔的土壤气候条件下，截至定植后12个月时，VM058无性系的生产表现最为优异，且其表现与种子繁殖的尾叶桉相当。