The utilization of biodegradable mulch films (bio-MFs) is essential for agricultural safety. This study explored the effects of no MF (CK), aging bio-MF (BM), non-aging bio-MF (NBM), and aging polyethylene (PE)-MF (PEM) on swine manure composting. The results demonstrated that outdoor aging (45 days) accelerated the macroscopic degradation of bio-MF in the BM. A reduction in NH-N and NH emissions in the initial composting was observed owing to an increase in the carbon source or the bulking effect provided by the MFs. NO emissions from days 9 to 21 were higher in the PEM than other treatments because of the formation of anaerobic zone in the MF-based aggregates. An obvious increase of in PEM indicated a promoted nitrification during the maturation phase, meanwhile the increase of NO-N and aggregate promoted denitrification. Altogether, MF influenced composting through the synergistic effects of increasing the carbon source, bulking effect, and aggregates.

中文翻译：

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农用地膜对猪粪堆肥的影响：薄膜降解和氮转化


使用可生物降解地膜（生物MF）对于农业安全至关重要。本研究探讨了无 MF (CK)、老化生物 MF (BM)、非老化生物 MF (NBM) 和老化聚乙烯 (PE)-MF (PEM) 对猪粪堆肥的影响。结果表明，户外老化（45 天）加速了 BM 中生物 MF 的宏观降解。由于碳源增加或 MF 提供的膨胀效应，初始堆肥中 NH3-N 和 NH3 排放量减少。由于基于 MF 的聚集体中厌氧区的形成，PEM 中第 9 至 21 天的 NO 排放量高于其他处理。 PEM的明显增加表明在成熟阶段促进了硝化作用，同时NO-N和团聚体的增加促进了反硝化作用。总而言之，MF 通过增加碳源、膨胀效应和聚集体的协同效应影响堆肥。