Key Laboratory of Smart Breeding (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Tianjin Agricultural University, Tianjin 300392, China; College of Engineering and Technology, Tianjin Agricultural University, Tianjin 300392, China.
Key Laboratory of Smart Breeding (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Tianjin Agricultural University, Tianjin 300392, China; College of Agronomy and Resource and Environment, Tianjin Agricultural University, Tianjin 300392, China.
Bioresour Technol. 2024 Jun;402:130777. doi: 10.1016/j.biortech.2024.130777. Epub 2024 May 1.
This research systematically assessed the changes in carbon, nitrogen and microbial profiling during pig and chicken manure transformation by black soldier fly larvae (BSFL) and subsequent composting process. BSFL had higher conversion efficiency for chicken manure. The pH, phosphorus and potassium contents in fresh BSFL frass increased than raw manure, but conductivity, total-/nitrate-/ammonium-nitrogen decreased. After BSFL conversion, pig manure had a larger nitrogen loss (25 %) while chicken manure had a larger carbon loss (32 %). During subsequent composting, the indicator changes (e.g. humus, ammonium nitrogen) in frass composts basically remained stable after 20-30 days. Compared to natural composts, frass composts had higher humification degree, cellulase activities, and more cellulose-degrading bacteria. Subsequent composting further reduced potential pathogens (reduced by 98.9 %-99.7 % than raw manure), and elevated the aromaticity and humification of frass. The findings gave an insight into the maturation management of manure-sourced insect frass.
本研究系统评估了黑水虻幼虫（BSFL）转化猪粪和鸡粪以及随后堆肥过程中碳、氮和微生物特征的变化。BSFL 对鸡粪具有更高的转化效率。新鲜 BSFL 粪便的 pH 值、磷和钾含量比原始粪便高，但电导率、全氮/硝酸盐氮/铵氮降低。BSFL 转化后，猪粪的氮损失较大（25%），而鸡粪的碳损失较大（32%）。在随后的堆肥过程中，20-30 天后，粪便堆肥中的指示变化（如腐殖质、铵态氮）基本保持稳定。与自然堆肥相比，粪便堆肥具有更高的腐殖化程度、纤维素酶活性和更多的纤维素降解菌。随后的堆肥进一步降低了潜在的病原体（比原始粪便减少 98.9%-99.7%），并提高了粪便的芳香度和腐殖化程度。研究结果为管理粪源昆虫粪便提供了新的见解。
