Department Of Environmental Science And Technology

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Author: search.filters.author.Garg, Vinod KumarSubject: search.filters.subject.Vermicomposting

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    Sustainable utilization and treatment of barnyard grass (Echinochloa crus-galli) weed biomass using vermitechnology
    (Springer, 2023-07-18T00:00:00) Gupta, Renuka; Mago, Monika; Garg, Vinod Kumar
    The present research is an attempt to manage Barnyard grass (Echinochloa crus-galli), a common rice weed, sustainably by vermicomposting technology. Echinochloa crus-galli (EC) biomass blended with cow dung in combination: 20:80, 40:60, 50:50, 60:40, and 80:20 with two controls 100% CD and 100% EC were vermicomposted�for 63�days. Earthworms could not grow well in feedstocks having higher percentage of EC. Total Kjeldahl nitrogen, total available phosphorus and total potassium in final vermicomposts were in the range of 13.6�21.5�g�kg?1, 11.8�15.9�g�kg?1, and 20.1�27.6�g�kg?1, respectively. Respiration rate (42�98 mgCO2 kg?1 VC 48�h?1) confirms vermicompost maturity and falls within the recommended limits (< 120 mgCO2 kg?1 VC 48�h?1). Vermicomposting process reduced the weed mass by 2.20�3.03 folds depicting its�effective decomposition. It was inferred from the results�that this weed can be converted into nutrient-rich manure employing vermicomposting and�this process facilitating the management of E. crus-galli in a cost-effective and environmentally sustainable manner. � 2023, International Society for Tropical Ecology.
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    Infusion of fruit-vegetable waste biomass into bakery sludge to enhance nutrient availability and vermicompost maturity using Eisenia fetida
    (Springer Science and Business Media Deutschland GmbH, 2022-12-23T00:00:00) Gupta, Renuka; Mago, Monika; Garg, Vinod Kumar
    Vermicomposting of bakery sludge (BS) was studied when amended with fruit-vegetable waste (FV) and cow dung (CD) with different proportions in vermi-units (VU): VU1(CD100), VU2(CD75BS25), VU3(CD50BS25FV25), VU4(CD25BS25FV50), and VU5(CD25 BS50FV25). Results showed a reduction in pH and total organic carbon and an increase in electrical conductivity, ash content, nitrogen, phosphorus, and potassium after vermicomposting. Carbon/nitrogen decrease followed: VU3 > VU1 > VU4 > VU2 > VU5, whereas a maximum reduction in carbon/phosphorus (60.7%) was observed in VU3 and a minimum (44.8%) in VU5. Seed germination assay of Cicer arietinum was 71�138% with maximum in VU3. Respiration rates of 69�115 mgCO2 kg?1VC48h?1 were achieved signifying stability and non-toxic impact. The presence of FV waste in vermi-units enhanced earthworm population, biomass, growth rate, and cocoons. VU3 exhibited higher macro- and micronutrients as well as worm growth and fecundity over other vermi-units. Based on results, FV waste and CD amendment at 25% and 50%, respectively, are suggested as appropriate to produce enriched vermicompost from BS using Eisenia fetida. � 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.