Journal of Integrative Agriculture ›› 2021, Vol. 20 ›› Issue (8): 2277-2288.DOI: 10.1016/S2095-3119(20)63332-9

所属专题: 农业生态环境-有机碳与农业废弃物还田合辑Agro-ecosystem & Environment—SOC

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  • 收稿日期:2020-03-16 出版日期:2021-08-01 发布日期:2021-07-20

The impacts of oxytetracycline on humification during manure composting can be alleviated by adjusting initial moisture contents as illustrated by NMR

FENG Yao1, WANG Gui-zhen1, LIU Yuan-wang1, CHENG Deng-miao1, FAN Shuang-hu2, ZHAO Quan-sheng1, Jianming XUE3, 4, ZHANG Shu-qing1, LI Zhao-jun1     

  1. 1 Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture and Rural Affairs/China-New Zealand Joint Laboratory for Soil Molecular Ecology, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China
    2 College of Life Science, Langfang Normal University, Langfang 065000, P.R.China
    3 College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, P.R.China
    4 Scion, Christchurch 8440, New Zealand
  • Received:2020-03-16 Online:2021-08-01 Published:2021-07-20
  • Contact: Correspondence LI Zhao-jun, Tel: +86-10-82108657, Fax: +86-10-82106225, E-mail: lizhaojun@caas.cn
  • About author:FENG Yao, E-mail: fengyao73@126.com;
  • Supported by:
    This study was jointly supported by the National Key R&D Program of China (2018YFD0500206), the National Natural Science Foundation of China (31772395), the Fundamental Research Funds for Central Non-profit Scientific Institutions, China (1610132019046), and the Science and Technology Support Project of Langfang, Hebei, China (2019013125).

摘要:

土霉素广泛存在于土壤和水体中,可能对农业生态环境构成潜在威胁。含土霉素的粪便作为有机肥施用是土霉素进入土壤和水体的主要途径之一。因此,实现粪便堆肥过程中土霉素的有效去除,并明确土霉素存在下堆肥有机质的转化规律十分重要。本文通过调节不同初始含水率(45%、55%、65%),外源模拟添加土霉素,将鸡粪和小麦秸秆共堆肥,以研究堆肥过程中土霉素降解及有机质变化规律。研究结果表明,堆肥初始含水率对土霉素降解有显著影响,与较低初始含水率相比,初始含水率为65%更有利于土霉素降解(降解率77.4%)和堆肥腐熟,然而,高初始含水率(65%)可能促进堆肥过程的硝化作用,从而增加了氨挥发。此外,增加堆肥初始含水率可以提高堆肥温度。核磁共振结果显示,土霉素的存在可以影响脂肪类物质的内部转化,从而抑制堆肥的腐殖化。55-65%的初始含水率可以缓解粪便堆肥过程中土霉素对腐殖化的影响。


Abstract:

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.

Key words: oxytetracycline degradation ,  humification ,  moisture content ,  composting ,  physico-chemical property