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Dairy manure as a potential source of crop nutrients and environmental contaminants 被引量:4
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作者 Danika Hill Matthew J.Morra +4 位作者 Thibault Stalder Sven Jechalke eva top Anne T.Pollard Inna Popova 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第2期117-130,共14页
Although animal manure is applied to agricultural fields for its nutrient value,it may also contain potential contaminants.To determine the variability in such contaminants as well as in valuable nutrients,nine uncomp... Although animal manure is applied to agricultural fields for its nutrient value,it may also contain potential contaminants.To determine the variability in such contaminants as well as in valuable nutrients,nine uncomposted manure samples from Idaho dairies collected during 2.5 years were analyzed for macro-and micro-nutrients,hormones,phytoestrogens,antibiotics,veterinary drugs,antibiotic resistance genes,and genetic elements involved in the spread of antibiotic resistance.Total N ranged from 6.8 to 30.7(C:N of 10 to 21),P from 2.4 to 9.0,and K from 10.2 to 47.7 g/kg manure.Zn(103-348 mg/kg)was more abundant than Cu(56-127 mg/kg)in all samples.Phytoestrogens were the most prevalent contaminants detected,with concentrations fluctuating over time,reflecting animal diets.This is the first study to document the presence of flunixin,a non-steroidal anti-inflammatory drug,in solid stacked manure from regular dairy operations.Monensin was the most frequently detected antibiotic.Progesterones and sulfonamides were regularly detected.We also investigated the relative abundance of several types of plasmids involved in the spread of antibiotic resistance in clinical settings.Plasmids belonging to the Inc I,Inc P,and Inc Q1 incompatibility groups were found in almost all manure samples.Inc Q1 plasmids,class 1 integrons,and sulfonamide resistance genes were the most widespread and abundant genetic element surveyed,emphasizing their potential role in the spread of antibiotic resistance.The benefits associated with amending agricultural soils with dairy manure must be carefully weighed against the potential negative consequences of any manure contaminants. 展开更多
关键词 MANURE ANTIBIOTICS HORMONES Veterinary drugs Emerging contaminants
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