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Revegetation to combat tree decline in the Midlands and Derwent Valley Lowlands of Tasmania: Practices for improved plant establishment

Citation

Close, DC and Davidson, NJ, Revegetation to combat tree decline in the Midlands and Derwent Valley Lowlands of Tasmania: Practices for improved plant establishment, Ecological Management & Restoration, 4, (1) pp. 29-36. ISSN 1442-7001 (2003) [Refereed Article]

DOI: doi:10.1046/j.1442-8903.2003.00135.x

Abstract

The results of site assessment and information survey of 13 plantings established between 1995 and 2000 from the Tasmanian Midlands and Derwent Valley Lowlands are presented. Establishment success of tubestock plantings ranged from 2 to 100% and that of direct seeding from 860 to 20 000 seedlings/ha. Successful establishment of tubestock and direct seeding was associated with first year watering and good rains, respectively. Browsing damage was evident in direct seeded plots with eucalypts most affected and acacias and She-oak (Allocasuarina verticillata) least affected. Tree-guards appeared to prevent browsing of tubestock, but those poorly constructed by inexperienced planters tended to collapse and smother seedlings. Larger seedlings appeared to exhibit better survival and growth than smaller seedlings under conditions of drought. While only two sites were mounded, mounding appeared superior over ripping as a site preparation technique, particularly where ripping on heavy, black cracking clays induces cracking, drying of the soil profile and seedling mortality when planted too close to rip lines. Recommendations are listed for best practice establishment techniques based on the site assessment and survey results. Of the recommendations, the requirement for post-planting weed control and the benefits of detailed records of plantings are emphasized. Most plantings surveyed would have benefited from postplanting weed control and it is suggested that this has been a major deficiency in previous revegetation programs. Furthermore, there has been little accountability of the success of projects undertaken. Improved record keeping would benefit landholders and particularly extension officers and researchers in the industry.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Terrestrial Ecology
Objective Division:Environment
Objective Group:Rehabilitation of Degraded Environments
Objective Field:Rehabilitation of Degraded Forest and Woodlands Environments
Author:Close, DC (Associate Professor Dugald Close)
Author:Davidson, NJ (Dr Neil Davidson)
ID Code:39907
Year Published:2003
Deposited By:Plant Science
Deposited On:2006-07-07
Last Modified:2011-10-03
Downloads:0

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