Abstract— Vermicomposting is a cost effective technology for processing or treatment of a gricultural wastes. This simple yet effective technology was easily applicable in developing countries. In Vietnam, vermicomposting is not new but has few publications. Implementing vermicomposting with spent mushroom compost (SMC) as culture medium is one research approach not only in Vietnam but also in the world. With its poor nutrition nature, in order to be used as culture medium, SMC needs well treated and supplementing with artificial nutritional compound (ANC). This study reported valuation of moisture and light on the growth of Perionyx exkavatus. Results showed that at 80% moisture, earthworm has the most growth rate and gain 100% clitellum development after 30 days. In natural light, growth rate and manure rate reached maximum with 5.61 mg.worm-1.day-1 and 235 mg.worm-1. ANC supplementing showed strong effects on earthworms’ growth rate. Earthworms gained maximum growth rate at 20ml ANC added in three kg of substrates with over double biomass after 60 days. However, due to ANC’s high acidity, with supplement volume over 25ml, there was a down trend of earthworm growth rate. ANC supplement did not show noticeable affect to manure rate of earthworms.
Keywords— Vermicompost, Perionyxexcavatus, spent mushroom compost, artificial nutrient compound
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