Transformation Of Nitrogen During Vermicomposting Of Fly Ash  

Oleh:

Bhattacharya, Satya S. ; Chattopadhyay, Gunindra N.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Waste Management & Research vol. 22 no. 6 (Dec. 2004), page 488-491.
Topik: Fly ash; vermicomposting; N transformation; wmr 702–6
Fulltext: 488.pdf (92.65KB)

Isi artikel

In view of environmental problems generated by large-scale production of fly ash, increasing attention is now being paid to the recycling fly ash as a source of plant nutrients in agriculture. However, the low amount of nitrogen in such materials forms a major constraint for such application. In the present study, the possibility of improving the N status in mixtures of fly ash and organic matter was investigated by adopting vermicomposting technology. Different combinations of fly ash and cow (Bos taurus) dung; namely fly ash alone, cow dung alone and fly ash + cow dung at 1 : 1, 1 : 3 and 3 : 1 ratios were incubated with and without epigeic earthworms (Eisenia fetida) for 50 days. The occurrence of N in different bio-available forms; namely easily mineralizable, NH4 + and NO3 – tended to increase considerably in the series treated with earthworms. This behaviour was attributed primarily to increased microbiological activity in the vermicomposted samples and also to a considerable rise in the concentration of nitrogen-fixing bacteria in this series. Among the three combinations of vermicomposted fly ash and cow dung, the 1 : 1 mixture appeared to exhibit the highest availability of nitrogen.

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