Working properties : Saligna is comparatively easy to work, nail and dress and takes a good polish. Mechanical properties : It is not as strong as the best hardwoods of Australia but is very strong in proportion to its weight. Can have a high variation in weight and density. Product Enquiry.
Overview Basic Info Technical. Timber is naturally durable, moderate crushing strength. Responds well to hand tools. Does split and can tear when cutting across the grain. Finishes when painting and polishing are good. Can be resistant to staining and impregnation.
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The cookie is used to store information of how visitors use a website and helps in creating an analytics report of how the website is doing. Tissue culture propagation has also been successful in Hawaii. The techniques used with saligna eucalyptus are essentially those reported by Boulay 1 for other eucalyptus species. Terminal and lateral shoot tips of greenhouse-grown rooted cuttings are multiplied, separated, and rooted in sterile culture, and afterwards grown to normal size in a mist chamber.
A number of propagules of saligna eucalyptus produced by tissue culture are now being compared in clonal progeny tests. Grafting success has been reported for saligna eucalyptus 24, Cleft, side, splice, and bottle grafting were all used successfully, but the tests were not observed for a long enough period to determine the extent of long-term incompatibility, a problem with many species of Eucalyptus.
Growth and Yield- Saligna eucalyptus is a fast growing tree, well suited for producing high yields of wood fiber on short rotations. Measurements of a plantation spacing study on a good site at Kaumahina, Maui 29 provide an example. Four spacings were tested: 2.
At 2 years, trees averaged 9. At 5 years, they had grown to Mean annual volume increment had already peaked at the two closer spacings in the study and was rapidly leveling out at the wider spacings. At 15 years, the trees in this study averaged The largest tree was 61 cm 24 in in d.
At 5 years, the trees at 2. Trees at 4. Other mean annual increment figures cited for E. The faster growing stand yielded wood with a specific gravity of 0. The tallest tree in Hawaii, thought to be the tallest hardwood in the United States, is a saligna eucalyptus.
When last measured in , the tree was about 50 years old, cm. Rooting Habit- Saligna eucalyptus develops roots throughout the soil profile so that it is quite windfirm on deep soils, but easily windthrown on shallow soils.
It does not produce a taproot. Roots are primarily from the stem below the lignotuber, although layering sometimes occurs a short distance from the lignotuber on buried stems. In plantations in Hawaii that are not subject to periodic short drought, about two-thirds of the root system is confined to the upper 61 cm 24 in of soil where most of the available nutrients are found.
In plantations subject to occasional drying of the surface soil, the shallow roots are killed and a deeper root system develops. Reaction to Competition- Because the tree is such a fast starter, planted seedlings can frequently grow faster than surrounding grass and herbaceous vegetation and shade it out.
This is particularly true if the seedlings have an intact root system when planted, as in modern tube container planting, so that little or no "shock" occurs to delay new growth after planting. At the upper elevational boundaries of sugarcane fields, saligna eucalyptus grown from seed in the soil at the time of cane harvest actually outgrew the sugarcane ratoon crop. In Hawaii, original plantings are made on completely cleared land.
Pre-emergent herbicides, though effective, have rarely been used. If pre-emergents are not used, one cleaning around trees that require it is made after 3 months and, depending on the site, a second cleaning may sometimes be made at 6 months. Further weeding is seldom necessary. Coppice growth of saligna eucalyptus is so rapid that competing plants are rarely a problem after cutting. Tests in Hawaii show that the leguminous tree Albizia falcataria outgrows saligna eucalyptus on some sites when planted row on row with both species equally fertilized.
It is one of the few woody plants known that can grow this fast on sites that are suited for saligna eucalyptus. The trials of mixing the legume with E. These thinnings are continued at 3- to 5-year intervals until a sawtimber harvest is made at age In the interim, all stumps are allowed to coppice to keep the site free of competition and to supply fuelwood crops.
Saligna eucalyptus is classed as very intolerant of shade and the slower growing trees in a stand quickly become suppressed. In Hawaii, crown closure is usually complete and crown differentiation begins in 3 years in stands planted at 3 by 3 in 10 by 10 ft. In coppice stands where numerous stems grow from every stump, crown differentiation begins as soon as sprouts appear. Many studies have shown that the maximum yield of wood is obtained by not thinning coppice at all However, if larger diameter and straighter stems are desired, thinning to one to three stems per stump is desirable.
Damaging Agents- Saligna eucalyptus grown in plantations in many parts of the world is susceptible to the eucalyptus canker disease, Cryphonectria cubensis. The disease kills young trees, deforms stems, and causes basal cankers that reduce the coppicing ability of stumps Rosegum eucalyptus is somewhat resistant and Eucalyptus urophylla, perhaps, is immune to the disease, so these species are now being used in place of E. In Hawaii, the disease is present only on the island of Kauai.
It attacks E. In Western Australia, two other canker diseases, Botryosphaeria ribis and Endothia havaensis, were determined to be pathogenic on E.
Phoracantha semipunctata, a wood-boring insect, degrades wood and reduces growth of eucalyptus in many places, including Hawaii, but is only a serious problem in trees that are stressed by severe drought. In Australia, saligna eucalyptus is subject to damage by Spondyliaspis psyllids, which predispose the trees to attack by the wood-boring beetle Xyleborus truncatus
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