School of Environment & Natural Resources, Doon University, Dehradun 248001, Uttarakhand, India.
School of Environment & Natural Resources, Doon University, Dehradun 248001, Uttarakhand, India.
Bioresour Technol. 2020 Sep;311:123585. doi: 10.1016/j.biortech.2020.123585. Epub 2020 May 25.
This study investigated the vermicomposting of duckweed (DW) mixed with cow dung in 25 (T), 50 (T), 75 (T), 100% (T) ratio using Eisenia fetida under a 35 d trail. Decrease in pH, organic carbon (33.54-38.25%), C/N ratio (43.6-56.6%), but increase in total N (18.2-42.4%), P (137-187%), and TK (7.76-79.4%) was recorded. Macro-elements (Mg, Fe, Zn, Mn, and Cu) also showed a many-fold increase in vermicomposts. T and T showed the highest mineralization rates. Activities of enzymes (proteases; dehydrogenases; β-galactosidase; acid phosphatase; and alkali phosphatases) and soil respiration rate was also higher in DW-rich waste mixtures. Seed bioassay test indicates the high agronomic application of DW-based vermicomposts. High earthworm biomass (975-1395 mg) and fecundity rate (1.53-4.07 cocoons worm) was recorded in all vermi-setups suggesting the suitability of DW as a substrate for E. fetida culture.
本研究采用赤子爱胜蚓在 35 天的试验中，以 25（T）、50（T）、75（T）、100%（T）的比例对浮萍（DW）与牛粪进行堆肥。记录到 pH 值、有机碳（33.54-38.25%）、C/N 比（43.6-56.6%）下降，但总氮（18.2-42.4%）、磷（137-187%）和 TK（7.76-79.4%）增加。宏观元素（Mg、Fe、Zn、Mn 和 Cu）在蚯蚓粪中也呈现出多倍增加。T 和 T 显示出最高的矿化率。酶活性（蛋白酶；脱氢酶；β-半乳糖苷酶；酸性磷酸酶和碱性磷酸酶）和土壤呼吸速率在 DW 丰富的废物混合物中也更高。种子生物测定试验表明，DW 基蚯蚓粪具有很高的农业应用价值。在所有的蚯蚓养殖装置中都记录到了高的蚯蚓生物量（975-1395mg）和生殖率（1.53-4.07 个茧/条），这表明 DW 作为赤子爱胜蚓培养的基质是合适的。
