Evaluation of organic matter decomposition during the maturing process in cattle feces compost by detergent analysis
2006
Takahashi, M.(Ishikawa-ken. Livestock Research Center, Hodatsushimizu (Japan))
The decomposition of organic matter during composting was evaluated by detergent analysis. Two kinds of compost, comprising of either cattle feces only, or cattle feces and sawdust, were used as test materials. Glycine was added to each compost as nitrogen source. The content and decomposition ratio of organic cellular contents (OCC), acid detergent fiber (ADF), neutral detergent fiber (NDF), NDF-ADF, acid detergent lignin (ADL), and neutral detergent lignin (NDL) were monitored during the composting process. After two weeks, NDF-ADF showed progress in decomposition and it continued to decompose gradually until the 24 months, which turned out to have the highest decomposition ratio. ADL hardly decomposed, whereas NDL decomposed slightly and consequently, their values reversed. The NDF-ADF and NDL began decomposing almost simultaneously after one week. Almost 100% of the NDF-ADF in cattle feces had decomposed after 12 months. Almost 100% of NDF-ADF in sawdust with added glycine had decomposed after 24 months. The NDF-ADF in sawdust with no added glycine showed a decomposition ratio of around 60% even after 24 months. Accumulation of nitrate nitrogen suppressed decomposition of both lignin and fiber in the cattle feces manure. Organic matter in sawdust that was soluble in acidic detergent (AD) was hardly decomposed. From the resemblance to the preexisting literature value, results indicate that detergent analysis allowed the evaluation of organic matter decomposition during compost processing of either cattle feces only or a mixture of cattle feces and sawdust.
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