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Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus
The expansion of Eucalyptus plantations to supply timber for an increasing population in South Africa will result in a great reduction in the country's run-off water. If Eucalyptus continues to be the source of timber in South Africa, the selection of more water use efficient species for planting in...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867613273815252992 |
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| access_status_str | Open Access |
| author | Le Roux, Debbie Jeanette |
| author2 | Bond, William J |
| author_browse | Bond, William J Le Roux, Debbie Jeanette |
| author_facet | Bond, William J Le Roux, Debbie Jeanette |
| author_sort | Le Roux, Debbie Jeanette |
| collection | Thesis |
| description | The expansion of Eucalyptus plantations to supply timber for an increasing population in South Africa will result in a great reduction in the country's run-off water. If Eucalyptus continues to be the source of timber in South Africa, the selection of more water use efficient species for planting in existing and new areas has to be implemented. An understanding of the physiological factors ruling growth and water use efficiency in Eucalyptus is needed to develop selection criteria for improved water use efficiency and harvestable stem production under a limited water supply. This study investigated the effects of soil moisture availability on the growth and water use efficiency of 6 commercial clones of Eucalyptus commonly grown in South Africa with the aim of determining the following: (i) The extent of clonal variation in growth, dry mass allocation patterns, water use efficiency and the water cost of wood production at 16 months after planting. (ii) The influence of plant physiological traits such as patterns of dry mass allocation, canopy leaf area, leaf canopy density, specific leaf area, foliar nitrogen concentration and instantaneous rates of photosynthesis and transpiration, on growth, water use efficiency and the water cost of wood production. (iii) The complications associated with sampling for stable carbon isotope ratios (δ¹³C) within a eucalypt canopy and the potential use of δ¹³C in plant tissues as a tool for ranking clonal water use efficiencies. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/18327 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:31.121Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/18327 Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus Le Roux, Debbie Jeanette Bond, William J Stock, William D Botany The expansion of Eucalyptus plantations to supply timber for an increasing population in South Africa will result in a great reduction in the country's run-off water. If Eucalyptus continues to be the source of timber in South Africa, the selection of more water use efficient species for planting in existing and new areas has to be implemented. An understanding of the physiological factors ruling growth and water use efficiency in Eucalyptus is needed to develop selection criteria for improved water use efficiency and harvestable stem production under a limited water supply. This study investigated the effects of soil moisture availability on the growth and water use efficiency of 6 commercial clones of Eucalyptus commonly grown in South Africa with the aim of determining the following: (i) The extent of clonal variation in growth, dry mass allocation patterns, water use efficiency and the water cost of wood production at 16 months after planting. (ii) The influence of plant physiological traits such as patterns of dry mass allocation, canopy leaf area, leaf canopy density, specific leaf area, foliar nitrogen concentration and instantaneous rates of photosynthesis and transpiration, on growth, water use efficiency and the water cost of wood production. (iii) The complications associated with sampling for stable carbon isotope ratios (δ¹³C) within a eucalypt canopy and the potential use of δ¹³C in plant tissues as a tool for ranking clonal water use efficiencies. 2016-03-28T14:43:25Z 2016-03-28T14:43:25Z 1993 Master Thesis Masters MSc http://hdl.handle.net/11427/18327 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Le Roux, Debbie Jeanette Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus |
| thesis_degree_str | Master's |
| title | Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus |
| title_full | Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus |
| title_fullStr | Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus |
| title_full_unstemmed | Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus |
| title_short | Growth, water use efficiency and stable carbon isotopes in commercial clones of Eucalyptus |
| title_sort | growth water use efficiency and stable carbon isotopes in commercial clones of eucalyptus |
| topic | Botany |
| url | http://hdl.handle.net/11427/18327 |
| work_keys_str_mv | AT lerouxdebbiejeanette growthwateruseefficiencyandstablecarbonisotopesincommercialclonesofeucalyptus |