Oxytetracycline (OTC) residues have been found in soil and water, and they may pose potential risks to agricultural ecological environments. One of the most impactful ways for OTC to enter the soil and water environments is through excrement used as organic fertilizer. Therefore, it is important to remove OTC during manure composting and to understand the transformation of the organic materials during composting in the presence of OTC. In the present paper, chicken manure and wheat sawdust spiked with OTC were composted under different initial moisture contents (MC) to evaluate the degradation of OTC and changes of organic matter during the composting process. The MC has a significant effect on OTC degradation during composting. A higher MC of 65% was more conducive to OTC degradation (77.4%) and compost maturity compared to the lower MC. However, the higher MC of 65% could increase the ammonia volatilization by promoting nitrification compared to the lower MC. An increase in the initial MC could improve the composting temperature. NMR results illustrated that the presence of OTC could affect the internal transformation of aliphatics, and OTC inhibited compost humification. Thus, an initial MC of 55–65% can alleviate the impacts of OTC on humification during manure composting.

在土壤和水中发现了土霉素（OTC）残留物，它们可能对农业生态环境构成潜在风险。OTC 进入土壤和水环境的最有效方式之一是通过用作有机肥料的粪便。因此，重要的是在粪便堆肥过程中去除 OTC，并了解在 OTC 存在下堆肥过程中有机材料的转化。在本文中，鸡粪和小麦木屑添加了 OTC，在不同的初始含水量 (MC) 下进行堆肥，以评估在堆肥过程中 OTC 的降解和有机物的变化。MC 对堆肥过程中的 OTC 降解有显着影响。与较低的 MC 相比，65% 的较高 MC 更有利于 OTC 降解 (77.4%) 和堆肥成熟度。然而，与较低的 MC 相比，65% 的较高 MC 可以通过促进硝化作用来增加氨挥发。初始 MC 的增加可以提高堆肥温度。核磁共振结果表明，OTC的存在会影响脂肪族的内部转化，而OTC抑制堆肥腐殖化。因此，55-65% 的初始 MC 可以减轻 OTC 对粪便堆肥过程中腐殖化的影响。