Reconstruction of root systems in Cryptomeria japonica using root point coordinates and diameters
Reconstruction of root systems in Cryptomeria japonica using root point coordinates and diameters
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DOI：
10.1007/s00425-018-3011-x
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发表时间：
2018-09
期刊：
影响因子：
4.3
通讯作者：
M. Ohashi;H. Ikeno;Kotaro Sekihara;T. Tanikawa;M. Dannoura;K. Yamase;C. Todo;Takahiro Tomita
中科院分区：
文献类型：
--
作者：
M. Ohashi;H. Ikeno;Kotaro Sekihara;T. Tanikawa;M. Dannoura;K. Yamase;C. Todo;Takahiro Tomita
Main conclusionWe developed simple algorithms for reconstructing tree root system architecture using only the root point coordinate and diameter, which can be systematically obtained without digging up the root systems.Root system architecture (RSA) is strongly related to various root functions of the tree. The aim of this study was to develop a three-dimensional (3D) RSA model using systematically obtained information on root locations and root diameters at the locations. We excavated root systems ofCryptomeria japonicaand systematically obtainedXYZcoordinates and root diameters using a 10-cm grid. We clarified the patterns of the root point connections and developed a reconstructed root system model. We found that the root diameters farther from the stump centre are smaller. Additionally, we found that the root lengths of the segments running between the base and the connected root point were smaller than those of other root segments, and the inner angle between the base and the stump and between the base and the connected root point was narrower than for the other pairs. The new RSA model developed according to these results had average accuracies of 0.64 and 0.80 for estimates of total volume and length, respectively. The developed model can estimate 3D RSA using only root point data, which can be obtained without digging up root systems. This suggests a wide applicability of this model in root function evaluation.
