<br>使用 Eisenia fetida 的沼液强化稻秸和压泥的蚯蚓堆肥：生产、表征、生长和毒理学风险评估,Journal of Environmental Management

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使用 Eisenia fetida 的沼液强化稻秸和压泥的蚯蚓堆肥：生产、表征、生长和毒理学风险评估
Journal of Environmental Management ( IF 8.0 ) Pub Date : 2024-01-06 , DOI: 10.1016/j.jenvman.2024.120032
Praveen Kumar Srivastava ₁ , Gopal Nath Tiwari ₂ , Akhoury Sudhir Kumar Sinha ₃

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沼气厂发挥着双重作用：它直接提供能源，并通过出口泥浆间接促进有机农业。然而，农业生物质废弃物，如稻草（RS）和压泥（PM），它们本身不能用作肥料，使用蚯蚓与沼液（BS）一起（60 天）进行蚯蚓堆肥，形成四种混合物：T1（BS，100%）、T2（3：2，BS：RS）、T3（3：2，BS：PM）和 T4（3：1：1，BS：RS：PM）。使用各种分析工具对衍生的蠕虫粪进行表征、元素分析和毒理学风险评估，例如 CHNS、FT-IR、FESEM-EDXA、XPS 和 ICP-OES 等有机元素分析仪。所有处理的 pH 值、电导率和 C/N 值分别在 7.1-7.8、3.2-6.0 dSm-1 和 12-15 之间。N（38%）、P（70%）、K（58%）、Mg（67%）、Ca（42%）和灰分（44%）的比例比初始原料显著增加（P < 0.05）。发现所有原料中重金属（Zn、Cu、Ni、Pb、Cd 和 Cr）的生态风险低于 WHO 允许的水平。蚯蚓的生长性能也明显高于对照原料组（P < 0.05）。分析方法验证了原料 T4 （3：1：1， BS： RS： PM）多孔性，含有 NH4+、PO43−、K+ 和其他营养物质。所有蚯蚓组的颗粒保持原始体积的 65-75%。同样，当这些颗粒用于农学并散布在田间时，它们产生的灰尘将比传统或粉末状堆肥或粪污少。与对照组相比，RS、PM 和 BS 在蚯蚓中的协同作用方法显着（P < 0.05）提高了种子发芽率（83%）、活力指数（42.5%），并将平均发芽时间缩短了 27%。此外，用 Abelmoschus esculentus 种子进行的盆栽试验表明，用 40% 的 T4 蚯蚓肥（3：1：1，BS：RS：PM）混合土壤培育的幼苗在芽、根和植物产量方面显示出高生长。

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Enhanced vermicomposting of rice straw and pressmud with biogas slurry employing Eisenia fetida: Production, characterization, growth, and toxicological risk assessment

The biogas plant plays a dual role: it directly provides energy and indirectly promotes organic farming through outlet slurry. However, agricultural biomass wastes such as rice straws (RS) and pressmud (PM), which can't be used as fertilizers on their own, were vermicomposted (60 days) with biogas slurry (BS), using earthworm, into four blends: T1(BS, 100%), T2(3:2, BS: RS), T3(3:2, BS: PM), and T4(3:1:1, BS: RS: PM). The characterization, elemental analysis, and toxicological risk assessment of derived vermimanure were carried out using various analytical tools, such as an organic elemental analyzer such as CHNS, FT-IR, FESEM-EDXA, XPS, and ICP-OES. The pH, electrical conductivity, and C/N values were within 7.1–7.8, 3.2–6.0 dSm−1, and 12–15, respectively, for all treatments. The proportions of N (38%), P (70%), K (58%), Mg (67%), Ca (42%), and ash (44%), increased significantly (P < 0.05) over the initial feedstocks. The ecological risks of heavy metals (Zn, Cu, Ni, Pb, Cd, and Cr) in all feedstocks were found to be under WHO-permitted levels. The growth performance of earthworms was also considerably higher (P < 0.05) over the control feedstock group. The analytical methods verified that feedstock T4 (3:1:1, BS: RS: PM) was more porous, containing NH4+, PO43−, K+, and other nutrients. Pellets of all vermimanure groups keep 65–75% of the original volume. As well, when these pellets have been employed for agronomy and dispersed in the field, they will cause less dust than traditional or powdered compost or manure. In comparison to the control group, the synergistic approach of RS, PM, and BS in vermimanure significantly (P < 0.05) enhanced seed germination (83%), vigour index (42.5%), and decreased mean germination time by 27%. Furthermore, pot trials with Abelmoschus esculentus seed indicated that seedlings cultivated with 40% vermimanure of T4 (3:1:1, BS: RS: PM) mixed soil showed high growth in shoot, root, and plant yield.

更新日期：2024-01-06

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