The proportion of suberinite in organic macerals is generallyless than 2% if onlysuberized cell walls are counted, and reached up to about 20% if both suberized cell wallsand corpocollinite which are contained within the cork cells are counted.

• 在侏罗系煤中，木栓质体在有机显微组分中所占比例仅以木栓化细胞壁计，一般在2%25以下，若包括木栓化细胞壁和充填在胞腔中团块镜质体两部分则最高可达20%25左右。