The effect of use of coal clinker ash as revegetation substrate on revegetation woody plants.

Abstract

The effect of use of coal clinker ash as revegetation substrate on revegetation woody plants. Abstract: Effective use of coal ash needed because coal uses for power station are increasing. As coal clinker ash (CA) are coarser than coal fly ash and CA are unlikely to scatter around, it is expecting for alternative revegetation substrate. In this report, revegetation substrate made of CA were used for pot test by revegetation woody plants, and try to show the effectiveness of substrate made from CA for cultivation. CA, peat moss and masa soil (weathered granite) were used for substrates. As masa soil and peat moss was used as control test and CA and peat moss were use for experimental test. And five tree plants (Quercus glauca, Q. phillyraeoides, Pasania edulis, Raphiolepts indica, Pittosporum tobira) were cultivated for 7 months.Almost chemical and physical properties of substrates from coal ash were same as that of masa soil. Content and leachate of heavy metals are less than safe level decided by Japanese law. Growth rate of height (H), diameter (D), D 2 H, and weight of fresh plants were not significantly different between each treatment. Boron concentrations of leaves grown in coal ash were larger than that done in masa soil except for one tree species. These results indicate that clinker ash can be used for substrate for revegetation woody plant, however, in actual use, characteristics of each CA were need to measure before use.