Heartwood variations in mid-aged plantations of Erythrophleum fordii

Zhao, Zhigang; Shen, Wei; Wang, Chunsheng; Hu, Jia; Zeng, Jie

doi:10.1007/s11676-020-01187-7

Cited by 4 publications

(1 citation statement)

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“…The variation in the profiles of heartwood, sapwood, and bark along the stem was analyzed to select predictor variables and model forms. The results (Figure 3) suggested that the heartwood radius and bark thickness decreased from base to top for the trees of Korean larch among various ages and sites, which agreed with the results of studies for other species [15,[34][35][36]. In contrast to previous findings [2,4,9,37], sapwood width was higher at the tree base, increased above the tree base to the maximum at the living branch height, and then decreased with tree height.…”

Section: Discussionsupporting

confidence: 87%

Quantifying the Profiles of Heartwood, Sapwood, and Bark Using a Seemingly Unrelated Mixed-Effect Model for Larix Olgensis in Northeast China

Yang

Hao

et al. 2023

Forests

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Heartwood, sapwood, and bark constitute the main components of the tree stem. The stem is the main component of the tree and plays an important role in supporting the tree and transporting nutrients and water. Therefore, quantifying the profiles of heartwood, sapwood, and bark is fundamental to understanding the different components of the tree stem. A seemingly unrelated mixed-effect model system was developed based on 179 destructively sampled trees for 31 permanent sample plots in Korean larch plantation in Northeast China. The heartwood radius and sapwood width were estimated and calibrated only by the observed bark thickness or by all response variables considering the correlations of submodel random effects. The results indicated that the model system achieved good fitting performance and prediction. In addition, after including one to ten bark thickness points and all response variables of sampling below the 2 m height of the tree, the estimated best linear predictor (EBLUP) for local calibration improved the prediction performance, indicating that the heartwood radius and sapwood width could be effectively calibrated by bark thickness while keeping intact the complete inner structure inside the stem. The results provided important information for forest managers and ecologists when selecting appropriate approaches for quantifying the profiles of heartwood, sapwood, and bark.

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