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Investigating constraints on direct seeding for native revegetation in the Tasmanian Midlands

journal contribution
posted on 2023-05-21, 04:56 authored by Tanya BaileyTanya Bailey, Peter HarrisonPeter Harrison, Hanusch, Y, Ranyard, C, Hooghkirk, C, Neil Davidson, Pinkard, EA, Bradley PottsBradley Potts

Direct-seeding trials in Tasmania tested the effectiveness of five treatments: a clear polymer film removed at three time intervals; insecticide; wetting agent; irrigation; and caging to exclude all mammal herbivores. The most effective treatment in improving early establishment of 15 native species across 2 years and at five sites was the application of the insecticide Bifenthrin to reduce seed predation by ants. The polymer film removed after 10 weeks also improved germination of a range of shrubby but not tree species. However, these early advantages were eroded over time at the first trial site due to damage from herbivores and at subsequent sites due to weed competition and mortality of seedlings over summer. Caging was beneficial to the ongoing persistence of tree and shrub species but also protected weeds. Further work on seed testing and timely weed control is needed.

Funding

Australian Research Council

Forest & Wood Products Australia Limited

Forestry Tasmania

Forico Pty Ltd

Greening Australia (TAS) Ltd

JM Roberts Charitable Trust

Sustainable Forest Management Pty Ltd

History

Publication title

Ecological Management & Restoration

Volume

22

Issue

S2

Pagination

106-117

ISSN

1839-3330

Department/School

School of Natural Sciences

Publisher

Wiley-Blackwell Publishing Asia

Place of publication

Australia

Rights statement

Copyright 2021 Ecological Society of Australia and John Wiley & Sons Australia, Ltd

Repository Status

  • Restricted

Socio-economic Objectives

Rehabilitation or conservation of terrestrial environments

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