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

作　　者：FENG Yao WANG Gui-zhen LIU Yuan-wang CHENG Deng-miao FAN Shuang-hu ZHAO Quansheng Jianming XUE ZHANG Shu-qing LI Zhao-jun 

机构地区：[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

出　　处：《Journal of Integrative Agriculture》2021年第8期2277-2288,共12页农业科学学报（英文版）

基　　金：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);the Science and Technology Support Project of Langfang,Hebei,China(2019013125).

摘　　要：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.

关 键 词：oxytetracycline degradation HUMIFICATION moisture content COMPOSTING physico-chemical property 

分 类 号：S141.4[农业科学—肥料学]