Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Comparative early growth of Eucalyptus species of the subgenera Monocalyptus and Symphyomyrtus in intensively-managed plantations in southern Tasmania.

Abstract

Four eucalypt species (Eucalyptus delegatensis, E. globulus, E. nitens and E. regnans) were established at each of 4 plantations situated between 60 m and 650 m altitude in SE Tasmania. E. grandis was also planted at the lowest plantation, and E. pauciflora was established at the upper two plantations. Each plantation was managed intensively through the application of fertilizer and pest control. There were large differences in height and diameter growth between ages 1 and 5 years between subgenera, species and provenances. In general, E. globulus and E. nitens of subgenus Symphyomyrtus grew faster than E. delegatensis and E. regnans of subgenus Monocalyptus. Survival was also greater in Symphyomyrtus than Monocalyptus species except at the uppermost (650 m) site where snow and frost killed E. globulus. The best diameter growth across all sites at age 5 years was from the Upper Toorongo provenance of E. nitens with mean diameters at breast height between 9.6 and 10.5 cm; the tallest species, 11.1 m was the Otways provenance of E. globulus at 240 m. Annual increments of both Symphyomyrtus species compared favourably with those obtained under management for high yield elsewhere in Australia.