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Establishment, suppression and growth of Eucalyptus delegatensis R.T. Baker in multiaged forests .III. Intraspecific allelopathy, competition between adult and juvenile for moisture and nutrients, and frost damage to seedlings

Citation

Bowman, DMJS and Kirkpatrick, JB, Establishment, suppression and growth of Eucalyptus delegatensis R.T. Baker in multiaged forests .III. Intraspecific allelopathy, competition between adult and juvenile for moisture and nutrients, and frost damage to seedlings, Australian Journal of Botany, 34, (1) pp. 81-94. ISSN 0067-1924 (1986) [Refereed Article]

DOI: doi:10.1071/bt9860081

Abstract

Field and pot experiments were designed to test the relative roles of allelopathy, competition for moisture and competition for nutrients in the suppression and growth of Eucalyptus delegatensis. In pot experiments litter cover was associated with slightly slower growth rates than in other treatments. A fertilization treatment was associated with increased growth rates in both trenched and untrenched situations in a field experiment, but the effect of fertilization was subdued in comparison with the effects of trenching or of total tree removal in the clear-felling treatment. Saplings and seedlings in the forest were under significantly greater moisture stress, as indicated by xylem pressure potential and stomata1 resistance, than those growing in the adjacent clear-felled areas. Surface soils in clear-felled areas had moisture contents above the level which caused seedling stress while surface soils within the forest were often below this level. These findings suggest that adult trees suppress seedling and sapling regrowth largely through their effect on soil moisture. However, another form of seedling growth suppression also occurs in the open as a result of frost damage.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Plant biology
Research Field:Plant developmental and reproductive biology
Objective Division:Environmental Management
Objective Group:Fresh, ground and surface water systems and management
Objective Field:Assessment and management of freshwater ecosystems
UTAS Author:Bowman, DMJS (Professor David Bowman)
UTAS Author:Kirkpatrick, JB (Professor James Kirkpatrick)
ID Code:69083
Year Published:1986
Web of Science® Times Cited:33
Deposited By:Plant Science
Deposited On:2011-04-19
Last Modified:2011-06-07
Downloads:0

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