Department of Zoology, Kongunadu Arts and Science College (Autonomous), Coimbatore 641 029, Tamil Nadu, India.
Department of Zoology, Kongunadu Arts and Science College (Autonomous), Coimbatore 641 029, Tamil Nadu, India.
Bioresour Technol. 2021 Jan;320(Pt A):124302. doi: 10.1016/j.biortech.2020.124302. Epub 2020 Oct 22.
Biotransformation of monogastric (Elephas maximus) and ruminant (Bos taurus) excrements with Eudrilus eugeniae was assessed by establishing five different treatments in triplicate: 100% elephant dung (T1), 50% elephant dung + 50% garden soil (T2), 50% elephant dung + 50% cow dung (T3), 100% cow dung (T4) and 50% cow dung + 50% garden soil (T5) and maintained for 90 days under experimental conditions. An increment of macronutrients and reduction of C/N ratio (<20) in the vermicomposts was recorded, where T3 presented higher NPK contents with the relative nutrient recovery efficiency of 1.65, 2.94 and 1.76, respectively. Cycle I (45 days) endorsed cocoons and juveniles, while Cycle II (90 days) supported sub-adults and adults. Seed germination and 28 days growth studies with Vigna unguiculata signified that the vermicomposts were phytotoxicity-free. The binary ratio in T3 (1:1) is suitable for the biotransformation of elephant dung into advantageous vermicompost with Eudrilus eugeniae.
采用建立 5 种不同处理重复 3 次的方法评估了食蚯蚓（Eudrilus eugeniae）对单胃动物（象，Elephas maximus）和反刍动物（牛，Bos taurus）粪便的生物转化：100%象粪（T1）、50%象粪+50%园土（T2）、50%象粪+50%牛粪（T3）、100%牛粪（T4）和 50%牛粪+50%园土（T5），在实验条件下保持 90 天。发现堆肥中的大量营养物质增加，C/N 比降低（<20），其中 T3 具有较高的 NPK 含量，相对养分回收效率分别为 1.65、2.94 和 1.76。第 I 周期（45 天）有利于茧和幼体，第 II 周期（90 天）有利于亚成体和成虫。豇豆（Vigna unguiculata）的种子发芽和 28 天生长研究表明，堆肥无植物毒性。T3 中的二元比例（1:1）适合用食蚯蚓将象粪生物转化为有利的堆肥。
