Wood that has been preserved in a peat bog.

木久埋于炭之中树木。

Chinese medicine residue contained less water than peat, and subirrigation could promote the growth and quality of poinsettia grown in medicine residue-substrate.

中药渣基质吸水量较低，采用花盆底部浇水可以促进一品红生长，改善盆花品质。