The Use of Chemically Treated Wooden Poles for Telephone and Power Transmission Lines in South Africa

Scott, M. H.

doi:10.1080/03759873.1946.9631037

Cited by 3 publications

(2 citation statements)

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“…The assessment was performed on mature Eucalyptus trees aged between 8 and 12 years that could easily be measured, as suggested by Marco de Lima et al [12]. The requirements for a tree species to be used as a power transmission pole are reasonable strength, DBH ranging from 18-28 cm and a total height ranging 30-55 m, straightness, ability to withstand splitting and twisting and should be amenable to treatment by use of preservatives [42]. From the phenotypic results, E. robusta, E. paniculata, E. maculata, E. dunnii, E. camaldulensis and E. citriodora might be used as power transmission poles because they have the preferred DBH but they are limited in height.…”

Section: Phenotypic Traits Of Eucalyptus Speciesmentioning

confidence: 99%

“…To combat pole shortage, one should compromise the ecological effects on the environment since species that mature fast need more water [7]. In Europe and USA, the use of wooden poles for power transmission is common, and for a long time, they have given satisfactory services, as steel poles are used only to carry lines of high tension in urban areas [42]. Other Eucalyptus species, such as E. saligna, are weak but have been used extensively for all kinds of poles because of their straightness and ability to absorb preservatives readily [43].…”

Section: Phenotypic Traits Of Eucalyptus Speciesmentioning

confidence: 99%

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Molecular Phylogeny of Selected Kenyan Eucalyptus Species Inferred from MatK, rbcL and TrnL-F Genes and Their Suitability for Power Transmission Poles

et al. 2022

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Genus Eucalyptus belongs to the family Myrtaceae and consists of more than 900 species, various hybrids and varieties. The major species that are grown in Kenya are Eucalyptus grandis, E. globulus, E. saligna and E. camaldulensis. Most Eucalyptus species are highly dependent on rainfall and this is challenged by climatic changes owing to global warming making it difficult to effectively match the availability of mature trees and the market demand especially for use as power transmission poles. With the widespread availability of other naturally occurring Eucalyptus species such as E. camaldulensis and E. globulus, it becomes important to determine the genetic diversity and to analyze the phenotypic traits of these species for suitability as power transmission poles in order to counter the overdependence on E. grandis. Phenotypic traits investigated included measuring total tree height and diameter at breast height (DBH), while molecular data were obtained from sequencing MatK, rbcL and TrnL-F genes from selected species and evolutionary analyses such as nucleotide substitution rates, base composition disparity indices, evolutionary divergence, nucleotide diversity indices and phylogeny construction were conducted in MEGA 11. Significant differences in DBH and height among Eucalyptus species were observed when the phenotypic data were subjected to ANOVA. In this study, E. robusta, E. paniculata, E. maculata, E. dunnii, E. camaldulensis and E. citriodora are fit to be used as power transmission poles but they are limited by their short height. However, E. tereticornis and E. glaucina have the desired DBH and height and hence can be used as substitutes for E.grandis. Generally, the molecular phylogeny study has shown that the studied Eucalyptus species are closely related and form various monophyletic clades which can be attributed to the short genetic distances, low substitution rates, low nucleotide bias disparity indices and low diversity scores. Further phylogenetic and gene expression studies involving more Eucalyptus species are needed to better understand Eucalyptus phylogeny, and diversity and identify species with similar genetic make-up to that of E. grandis which has been used extensively for the provision of electricity transmission poles.

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Section: Phenotypic Traits Of Eucalyptus Speciesmentioning

confidence: 99%