Department of Biotechnology, School of Life Sciences, Vels Institute of Science, Technology and Advanced Studies, Pallavaram, 600 117, Chennai, Tamil Nadu, India.
Department of Biotechnology, School of Life Sciences, Vels Institute of Science, Technology and Advanced Studies, Pallavaram, 600 117, Chennai, Tamil Nadu, India.
Environ Res. 2023 Feb 15;219:115090. doi: 10.1016/j.envres.2022.115090. Epub 2022 Dec 15.
Vermicomposting uses less energy and requires fewer infrastructures, and it is capable of restoring soil nutrition and carbon. Banana cultivation produces lots of trash in a single crop season, with 30 tonnes of waste generated per acre. The biodegradable fraction of banana leaf waste is thrown out in large quantities from temples, markets place wedding halls, hotels, and residential areas. Vermicomposting can be used for recovering lignin, cellulose, pectin, and hemicellulose from banana leaves. Earthworm digests organic materials with the enzymes produced in gut microflora. Biochar adds bulk to vermicomposting, increases its value as fertilizer. The goal of this study was to amend biochar (0, 2, 4 and 6%) with banana leaf waste (BLW) + cow dung (CD) in three different combinations (1:1, 2:1 and 3:1) using Eisenia fetida to produce enriched vermicompost. In the vermicompost with biochar groups, there were higher levels of physicochemical parameters, as well as macro- and micronutrient contents. The growth and reproduction of earthworms were higher in groups with biochar. A maximum of 1.82, 1.18 and 1.67% of total nitrogen, total phosphorus and total potassium was found in the final vermicompost recovered from BLW + CD (1:1) amended with 4% biochar; while the other treatments showed lower levels of nutrients. A lower C/N ratio of 18.14 was observed in BLW + CD (1:1) + 4% biochar followed by BLW + CD (1:1) + 2% biochar amendment (19.92). The FTIR and humification index studies show that degradation of organic matter has occurred in the final vermicompost and the substrates with 4% biochar in 1:1 combination showed better degradation and this combination can be used for nutrient rich vermicompost production.
蚯蚓堆肥利用较少的能源和基础设施，能够恢复土壤营养和碳。香蕉种植在一个作物季节会产生大量垃圾，每英亩产生 30 吨废物。香蕉叶废物的可生物降解部分大量从寺庙、市场、婚礼大厅、酒店和住宅区被丢弃。蚯蚓堆肥可用于从香蕉叶中回收木质素、纤维素、果胶和半纤维素。蚯蚓用肠道微生物群产生的酶消化有机物质。生物炭为蚯蚓堆肥增加体积，提高其作为肥料的价值。本研究的目的是用 0、2、4 和 6%的生物炭与香蕉叶废物（BLW）+牛粪（CD）以三种不同的组合（1:1、2:1 和 3:1）进行改良，并用赤子爱胜蚓（Eisenia fetida）生产富含有机质的蚯蚓堆肥。在生物炭组的蚯蚓堆肥中，理化参数以及大量和微量营养素含量更高。生物炭组的蚯蚓生长和繁殖更高。在 BLW+CD（1:1）添加 4%生物炭的处理中，最终蚯蚓堆肥中总氮、总磷和总钾的含量最高，分别为 1.82%、1.18%和 1.67%；而其他处理的养分含量较低。在 BLW+CD（1:1）+4%生物炭处理中观察到较低的 C/N 比 18.14，其次是 BLW+CD（1:1）+2%生物炭（19.92）。FTIR 和腐殖化指数研究表明，最终的蚯蚓堆肥中有机物质发生了降解，在 1:1 组合中添加 4%生物炭的底物显示出更好的降解，这种组合可用于生产营养丰富的蚯蚓堆肥。
