摘要

处理过的头孢菌素菌丝渣（CMD）作为土壤改良剂的土地施用是其在垃圾填埋和焚烧处置中的替代选择，因为它具有环境和农艺效益。这项研究验证了使用脱水微波预处理的CMD作为土壤改良剂的功效。盆栽试验通过化学和荧光参数来评估土壤有机质（SOM）剖面的时间变化。在老化期间，CMD处理的土壤经历了土壤pH和土壤电导率的突然升高，同时土壤有机碳和土壤有机氮含量迅速下降。与蛋白质类物质有关的特定Ex / Em峰逐渐消失，而与腐殖酸类物质有关的Ex / Em峰继续增加。荧光区域整合（FRI）结果显示上升的PV，n / PIII，n指数（1.94）和与化学数据显着相关（Procrustes分析的M2 = 0.2875，r = 0.8441，P <0.001,999排列）。总之，尽管土壤调理后化学和荧光数据随时间的变化，与对照土壤样品相比，在培养期结束时观察到含腐殖酸样物质的SOM含量增加，表明微波预处理的CMD可能作为土壤改良剂应用。

Land application of treated cephalosporin mycelial dreg (CMD) as a soil amendment is an alternative to its disposal in landfills and incineration because it has environmental and agronomic benefits. This study validated the efficacy of using the dewatered, microwave-pretreated CMD as a soil amendment. Pot experiments were conducted to assess the temporal changes in soil organic matter (SOM) profiles via chemical and fluorescent parameters. During the ageing period, the CMD-treated soil experienced a sudden rise in soil pH and soil electrical conductivity, along with a rapid decline in soil organic carbon and soil organic nitrogen content. The specific Ex/Em peak related to protein-like substances gradually disappeared, while those related to humic acid-like substances continued to increase thereafter. Fluorescence regional integration (FRI) results showed an ascended PV,n/PIII,n index (1.94) and significant correlations with chemical data (M2 = 0.2875, r = 0.8441, P < 0.001, 999 permutations for Procrustes analysis). Taken together, despite the temporal changes in chemical and fluorescent data after soil conditioning, the increased content of SOM containing humic acid-like substances was observed at the end of the incubation period compared with control soil samples, indicating that the microwave-pretreated CMD might be applied as a soil amendment.

https://www.sciencedirect.com/science/article/pii/S0048969717333193