Estimation of tree root biomass using ground penetrating radar without soil excavation

树木根系可积累30%的单株生物量。探地雷达可以对根系进行无损检测，但对根系的检测频率尚未明确。通过对一片黑松林的雷达扫描，将雷达探测图像与根系垂直分布进行比较，结果表明，直径大于1.0cm的黑松根系的探测频率为54%，探地雷达法估算的根系生物量占挖掘根系的68%。根系的朝向会影响雷达在林地中的探测频率。

Tree root can accumulate 30% of individual tree biomass. Ground penetrating radar can detect roots non-destructively, but detection frequency of roots has not been elucidated. We conducted radar scanning in a Pinus thunbergii forest and compared radar detection images with vertical distribution of roots.Detection frequency of Pinus roots that were larger than 1.0 cm in diameter was 54% and the methods using ground penetrating radar can estimate root biomass to be 68% of excavated roots. Root orientation can affect radar detection frequency in forest field.