Among-family variations of solid wood properties in 4-year-old Eucalyptus camaldulensis trees selected for pulpwood production in Thailand

Ishiguri, Futoshi; Diloksumpun, Sapit; Tanabe, Jun; Ohshima, Jyunichi; Iizuka, Kazuya; Yokota, Shinso

doi:10.1080/20426445.2016.1261528

Cited by 9 publications

(11 citation statements)

References 25 publications

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“…In addition, the basic density values obtained this study were compared with those from younger E. camaldulensis trees (Table 4). The mean basic density ranged from 0.61 to 0.73 g/cm 3 in five different clones of 5-year-old E. camaldulensis and from 0.48 to 0.55 g/cm 3 in eight half-sib families of 4-year-old E. camaldulensis trees Family (open pollinated) Nakhon Ratchasima, Thailand 4 6.5-9.3 0.48-0.55 Ishiguri et al (2017) Note: D, stem diameter at 1.3 m above the ground; BD, basic density; ND, no data.…”

Section: Discussionmentioning

confidence: 99%

“…planted in Thailand (Veenin et al 2005;Ishiguri et al 2017; Table 4). The results of the present study are similar to those reported by Veenin et al (2005), and the values are generally higher than those reported by Ishiguri et al (2017). Therefore, it seems that prolonged rotation age and subsequent thinning do not always lead E. camaldulensis T5 clones to produce low-quality wood.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Thai farmers have considered converting their plantations to produce solid wood instead of pulpwood. However, there is limited information about the basic wood properties of E. camaldulensis, which may affect utilization of solid lumber produced by this species (Ishiguri et al 2013(Ishiguri et al , 2017, even though several researchers have examined other Eucalyptus species (Dickson et al 2003;McKenzie et al 2003;de Moraes Gonçalves et al 2004;Raymond et al 2004;Washusen et al 2009;Derikvand et al 2018Derikvand et al , 2019.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous research (Ishiguri et al 2013(Ishiguri et al , 2017, we investigated the properties of solid wood produced by four-year-old E. camaldulensis trees from eight half-sib families intended for pulpwood production in Thailand. We identified significant among-family variations in the stresswave velocity of stems, dynamic Young s modulus of logs, green moisture content, basic density, and interlocked grain of the wood (Ishiguri et al 2013(Ishiguri et al , 2017. We also showed that E. camaldulensis trees with superior growth characteristics and solid wood properties can be selected from those families.…”

Section: Introductionmentioning

confidence: 99%

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Effects of thinning on anatomical characteristics and wood properties of 12-year-old Eucalyptus camaldulensis trees planted in Thailand

Aiso-Sanada

Ishiguri

Diloksumpun

et al. 2019

Tropics

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To clarify the effects of thinning on the growth and wood quality of Eucalyptus camaldulensis trees grown in Thailand, the growth characteristics, anatomical characteristics, and wood properties of T5 clones, which are used on plantations to produce pulpwood, were investigated. Core samples were collected from trees grown on both thinned and unthinned (i.e., control) plots. The effects of thinning on the trees anatomical characteristics and wood properties were evaluated at bark side (2 cm from the bark) of the tree. We identified significant differences between the two plots in terms of stem diameter, wood volume, wall thickness of wood fiber, moisture content, and basic density. However, trends in the radial variation of the measured characteristics were almost the same between the thinned and control plots. These results suggest that prolonged rotation age and subsequent thinning do not negatively affect the quality of solid wood produced by E. camaldulensis.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of thinning on anatomical characteristics and wood properties of 12-year-old Eucalyptus camaldulensis trees planted in Thailand

Aiso-Sanada

Ishiguri

Diloksumpun

et al. 2019

Tropics

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“…Conversely, the availability of solid wood has been considered for many fast-growing species, including Eucalyptus species (Iwasaki et al, 2012). In a previous study, we evaluated the wood properties of 4-year-old E. camaldulensis half-sib families selected based on their superior growth characteristics (Ishiguri et al, 2013(Ishiguri et al, , 2017. Significant among-family variances were identified in the stem diameter, Young's modulus of logs, moisture content, basic density, and maximum height of the interlocked grain (Ishiguri et al, 2013(Ishiguri et al, , 2017.…”

Section: Introductionmentioning

confidence: 99%

Repeatability of growth characteristics and wood properties for solid wood production from Eucalyptus camaldulensis half-sib families growing in Thailand

Nezu

Ishiguri

Aiso³

et al. 2020

Silvae Genetica

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To promote solid wood production, the diameter at breast height, height, stress-wave velocity, surface-released strain, basic density and compressive strength parallel to the grain were measured for 10 half-sib families of 12-year-old Eucalyptus camaldulensis Dehnh. trees growing in Thailand. Based on the results, growth rates, correlations among measured properties, radial and among-family variations of wood properties, and their repeatability were evaluated. Diameter at breast height, height, and wood volume were exponentially increased at initial stage, and then gradually increased toward to 12 years after planting. The maximum current annual increment and mean annual increment in wood volume showed at age of 8 and 11years old, suggesting that rotation period for optimum productivity may be ranged from 8 to 11 years old. Wood with stable properties was found greater than 6 cm from the pith. These results indicate that 12-year-old E. camaldulensis trees had already reached the maturation stage. No significant correlations were found between growth characteristics and wood properties. Significant variances in the height, stress-wave velocity, and basic density were found among the 10 families. The F-values and repeatability of the wood properties in the outer wood were higher than those in the inner wood. These results indicate that the properties of the outer wood are closely related to genetic factors. Thus, to obtain superior E. camaldulensis trees for solid wood production, the family selection should be conducted using the outer wood of aged trees.

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Assessing wood grain and twist in a 2-year-old Eucalyptus bosistoana breeding population

Sharma,

Dijkstra,

Garrill

et al. 2024

Trees

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Key message Radial grain patterns in young E. bosistoana trees are not random but are under genetic control and are correlated to other properties. Detailed high-resolution grain assessments match results from economical larger resolution techniques. Abstract Interlocked grain affects stem properties and timber value. Eucalyptus bosistoana is an emerging plantation species that is supported by a breeding programme, and which shows prominent interlocked grain. Grain assessments are difficult, either restricted in their spatial resolution or resource demanding. Comparative analysis of flexible and high-resolution X-ray microtomography grain measurements were shown to match the economical splitting test. Splitting demonstrated that, on average, grain in the 2-year-old E. bosistoana trees was straight close to the pith becoming slightly left-handed over the first 4 mm, but then developing a strong right-handed twist reaching an average of almost 5° by 12 mm. There was, however, a large degree of variability. Further, grain measures obtained from splitting tests correlated to the observed twisting of the stems. Lastly, twisting of timber was under genetic control. The combination of a heritability (h2) value of 0.34 and a coefficient of genetic variation value (rg) of 44% means that our assessment techniques for young trees could be incorporated into a breeding programme.

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Among-family variations of solid wood properties in 4-year-old Eucalyptus camaldulensis trees selected for pulpwood production in Thailand

Cited by 9 publications

References 25 publications

Effects of thinning on anatomical characteristics and wood properties of 12-year-old <i>Eucalyptus camaldulensis</i> trees planted in Thailand

Effects of thinning on anatomical characteristics and wood properties of 12-year-old <i>Eucalyptus camaldulensis</i> trees planted in Thailand

Repeatability of growth characteristics and wood properties for solid wood production from Eucalyptus camaldulensis half-sib families growing in Thailand

Assessing wood grain and twist in a 2-year-old Eucalyptus bosistoana breeding population

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