Ponmani S, Udayasoorian C, Jayabalakrishnan R M, Kumar K Vinoth
J Environ Biol. 2014 Jul;35(4):617-22.
A 90 day study was conducted to evaluate the efficiency of an exotic earthworm species (Eudrilus eugeniae) for decomposition of different types of organic substrates (mixed liquor suspended solids, cow dung and leaf litter) into valuable vermicompost. Mixed liquor suspended solids (MLSS) and leaf litter (LL) were mixed with cow dung (CD) in eight different ratios with three replicates for each treatment. All vermibeds expressed a significant decrease in pH, organic carbon, C:N ratio and an increase in total nitrogen, phosphorus and potash. Overall, earthworms could maximize decomposition and mineralization efficiency in bedding with lower proportions of MLSS. Maximum value for earth worm zoo mass and higher concentration of nutrient content was observed in CD + MLSS + LL in 1:1:2 ratios. Earthworm mortality tended to increase with increasing proportion of MLSS and maximum mortality in E. eugeniae was recorded for MLSS treatment alone. Results indicate that vermicomposting might be useful for managing the energy and nutrient of MLSS on a low-input basis. Products of this process can be used for sustainable land restoration practices.
进行了一项为期90天的研究，以评估一种外来蚯蚓物种（赤子爱胜蚓）将不同类型的有机底物（混合液悬浮固体、牛粪和落叶）分解为有价值的蚯蚓堆肥的效率。混合液悬浮固体（MLSS）和落叶（LL）与牛粪（CD）按八种不同比例混合，每种处理重复三次。所有蚯蚓床的pH值、有机碳、碳氮比均显著降低，总氮、磷和钾含量增加。总体而言，蚯蚓可以在MLSS比例较低的垫料中最大限度地提高分解和矿化效率。在1:1:2比例的CD + MLSS + LL中观察到蚯蚓种群数量的最大值和更高的养分含量浓度。蚯蚓死亡率倾向于随着MLSS比例的增加而增加，单独MLSS处理时赤子爱胜蚓的死亡率最高。结果表明，蚯蚓堆肥可能有助于在低投入基础上管理MLSS的能量和养分。该过程的产物可用于可持续的土地恢复实践。
