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On the Quality of Vermicompost and Millipede Compost

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Sharathchandra K., Sharma B. B., Sridhar K. R., Gowda M. M. S.
World News of Natural Sciences
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2025
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vol. 60
376-386
EN
Saprophagous fauna (e.g., earthworms and millipedes) involves the mineralization of plant detritus and enriches soil fertility. The quality of composts (physicochemical features and mineral composition) produced by earthworms (Eudrilus eugeniae) and millipedes (Arthrosphaera magna) in mesocosms using leaf litter with cow dung slurry has been compared in this study. Except for moisture and water-holding capacity, the rest of the features (conductivity, bulk density, specific gravity, and porosity) were significantly higher in vermicompost (p<0.05) than in millipede compost. Among the nutrients, organic matter, organic carbon, nitrogen, potassium, calcium, and iron contents were significantly higher in vermicompost (p<0.05) compared to millipede compost. There was no significant difference in total carbon, phosphorus, magnesium, sodium, manganese, and zinc (p>0.05), while chloride was below the detectable limit. Copper, selenium, silicon, aluminum, chromium, and sulfur were in trace amounts in vermicompost, while below detectable limits in millipede compost. The conversion efficiency of lignocellulosic material by saprophagous fauna may be dependent on the microbial consortium in their gut and lignocellulose. Although some amendments are necessary to improve the quality of manure, mixing suitable proportions of vermicompost and millipede compost may circumvent such inadequacy.
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Insights into the Leachates of Vermicompost and Millipede Compost

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Sharma B. B., Sharathchandra K., Sridhar K. R.
World News of Natural Sciences
|
2025
|
vol. 60
368-375
EN
Liquid organic fertilizers have higher bioavailability of nutrients and are the best alternative for chemical fertilizers. In the present study, the compost leachate from earthworm (Eudrilus eugeniae) and pill millipede (Arthrosphaera magna) as byproducts has been compared for their nutrients as potential liquid fertilizers. The compost was prepared from pre-digested leaf litter and cow dung (60:40, w/w). The leachate collection commenced 15 days after the setup and continued on 25, 35, 45, 55, and 65 days. The dark amber-colored vermicompost leachate (VCL) and honey-colored pill millipede compost leachate (MCL) collected were analyzed for physicochemical composition. Pre-digested organic material without earthworms or millipedes served as a control (CL). Results indicate that VCL shows a higher value than MCL and the CL for conductivity, TDS, salinity, phosphorus, potassium, calcium, magnesium, and sodium. Nitrogen content and other nutrients were high in MCL, making it a good supplement. The C/N ratio of CL drastically reduced in VCL and MCL, facilitating quick availability of nitrogen. Given the increasing demand for liquid organic fertilizers due to their ease of application and high nutrient availability, both VCL and MCL serve as effective organic fertilizers.
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