Abstract
Coal bottom ash and cattle manure can be used as soil ameliorant. The application of coal bottom ash and cattle manure can improve the soil chemical properties, such as pH and the amounts of available nutrients in soil. The objective of the study was to understand the effect of coal bottom ash and cow manure application on soil chemical properties and heavy metal contents in soil and mustard (Brassica juncea). A pot experiment was conducted in a greenhouse, including three treatment factors, i.e. age of coal bottom ash (fresh, 4 months and 2 years), dose of coal bottom ash, i.e. 0, 40 and 80 Mg ha-1, and dose of cattle manure, i.e. 0 and 10 Mg ha-1. The results show that the application of coal bottom ash and cattle manure increased the pH and the amounts of total-N, available-P and exchangeable cations (K, Ca and Mg) of the soil. The application of coal bottom ash increased the amounts of Pb, Cd and Co in the soil, but did not increase the amounts of Pb and Co in mustard, while the application of cattle manure increased the amount of Cd both in soil and mustard. Keywords: Coal bottom ash, cattle manure, heavy metal, mustard, soil ameliorant
Highlights
Tin mining is widely distributed in Bangka Belitung Island Province
The low of sand tailing fertility was due to there was not top mineral soil layers covering sand tailing that had generally fertile and it was lost caused by tin mining process
It can be concluded that compost application significantly improved growth of cover crop compared to mineral soil and control
Summary
Tin mining is widely distributed in Bangka Belitung Island Province. The impact of this activity causes degraded land amounting to 1,645,414 ha, and resulting in 887 kolong (water logging) or lombong in Malaysia (Ang 2002) with total area about 1,712.62 ha. Reclamation is principally to make post tin mining able to be used for cultivation in environmentally (Mokhtaruddin and Norhayati 1995; Yani 2005) Revegetation on this tailing is always difficult due to high acidity (Ye et al 2002)
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