Impact of residual antibiotics on microbial decomposition of livestock manures in Eutric Regosol:Implications for sustainable nutrient recycling and soil carbon sequestration
简介：The land application of livestock manure has been widely acknowledged as a beneficial ap-proach for nutrient recycling and environmental protection.However,the impact of resid-ual antibiotics,a common contaminant of manure,on the degradation of organic com-pounds and nutrient release in Eutric Regosol is not well understood.Here,we studied,how oxytetracycline(OTC)and ciprofloxacin(CIP)affect the decomposition,microbial com-munity structure,extracellular enzyme activities and nutrient release from cattle and pig manure using litterbag incubation experiments.Results showed that OTC and CIP greatly inhibited livestock manure decomposition,causing a decreased rate of carbon(28％-87％),nitrogen(15％-44％)and phosphorus(26％-43％)release.The relative abundance of gram-negative(G-)bacteria was reduced by 4.0％-13％while fungi increased by 7.0％-71％dur-ing a 28-day incubation period.Co-occurrence network analysis showed that antibiotic ex-posure disrupted microbial interactions,particularly among G-bacteria,G+bacteria,and actinomycetes.These changes in microbial community structure and function resulted in decreased activity of urease,β-1,4-N-acetyl-glucosaminidase,alkaline protease,chitinase,and catalase,causing reduced decomposition and nutrient release in cattle and pig ma-nures.These findings advance our understanding of decomposition and nutrient recycling from manure-contaminated antibiotics,which will help facilitate sustainable agricultural production and soil carbon sequestration.展开
学者：LinfaFangPrakashLakshmananXiaoxuanSUYujiaShiZhengChenYuZhangWeiSunJunxiWuRanXiaoXinping
关键词：Residual antibioticsLivestock manure decompositionmicrobial communityco-occurrence networkEnzyme activities
在线出版日期：2025-01-22 （网站首发日期）
