Journal article

Publication year: 2021

Pages: 117-130

Journal: Journal of Environmental Sciences

Volume number: 100

ISSN: 1001-0742

eISSN: 1878-7320

DOI Link: https://doi.org/10.1016/j.jes.2020.07.01.6

Publisher: Elsevier

Abstract: 
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 IncI, IncP, and IncQ1 incompatibility groups were found in almost all manure samples. IncQ1 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. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

Harvard Citation style: Hill, D., Morra, M., Stalder, T., Jechalke, S., Top, E., Pollard, A., et al. (2021) Dairy manure as a potential source of crop nutrients and environmental contaminants, Journal of Environmental Sciences, 100, pp. 117-130. https://doi.org/10.1016/j.jes.2020.07.01.6

APA Citation style: Hill, D., Morra, M., Stalder, T., Jechalke, S., Top, E., Pollard, A., & Popova, I. (2021). Dairy manure as a potential source of crop nutrients and environmental contaminants. Journal of Environmental Sciences. 100, 117-130. https://doi.org/10.1016/j.jes.2020.07.01.6