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| Residual characteristics and risk assessment of tetracycline antibiotic in soil-lettuce system |
| Received:June 11, 2024 |
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| KeyWord:tetracycline antibiotic;soil;lettuce;residual properties;risk assessment |
| Author Name | Affiliation | E-mail | | SI Haili | Institute of Agricultural Resources and Environment, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China
College of Forestry and Prataculture, Ningxia University, Yinchuan 750021, China | | | QIN Lili | Institute of Agricultural Resources and Environment, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China | | | CHEN Lijia | Yinchuan Livestock Technology Extension Service Center, Yinchuan 750001, China | | | SHANG Hongying | Institute of Agricultural Resources and Environment, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China | | | ZHU Ying | Wuzhong National Agricultural Science and Technology Park Management Committee, Wuzhong 751100, China | | | LIU Julian | Institute of Agricultural Resources and Environment, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China | | | LI Lei | Institute of Agricultural Resources and Environment, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China | | | JI Lidong | Institute of Agricultural Resources and Environment, Ningxia Academy of Agricultural and Forestry Sciences, Yinchuan 750002, China | jili521010@163.com |
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| Abstract: |
| Veterinary antibiotics can be introduced into the soil through the application of livestock manure, which brings potential risks to plant growth, soil environment and human health. A pot experiment was carried out in greenhouse. Tetracycline（TC）and oxytetracycline（OTC）were added to the soil with 5 different pollution levels of 0, 10, 50, 250 mg·kg-1 and 1 250 mg·kg-1, respectively, to study the residue characteristics of tetracycline antibiotic（TCs）in soil and lettuce, its effects on lettuce growth, soil microorganisms and the assessment of human health risks. The results showed that the degradation rate of TCs in soil was over 92%, and the degradation rate of TC was higher than that of OTC. The residue of TCs in the upper and lower parts of lettuce field was positively correlated with the content of TCs in soil, and the residue of TCs in the lower part of lettuce field at the concentration of 50-1 250 mg·kg-1 in soil was lower than that in the upper part of lettuce field. The bioaccumulation ability is manifested as OTC>TC, and under soil TCs content of 50-1 250 mg·kg-1, the transport coefficient of lettuce to TCs is 12.63%-33.77%. The growth of lettuce was inhibited when the concentration of TCs in soil ≥250 mg·kg-1, and there was a negative correlation between the SPAD value of leaf and the concentration of TCs in soil, the effects of soil TCS on root growth were as follows：TC≤250 mg·kg-1, OTC 50 mg·kg-1 promoted root growth, TC 1 250 mg·kg-1, OTC≥250 mg·kg-1 inhibited root growth of lettuce. By calculating the human health risk value（HQ）of TCs, the health risk of the edible part of lettuce was lower（HQ<0.1） when the content of TCs in soil was less than 250 mg·kg-1, and the risk value of children was higher than that of adults. The amount of soil microorganism decreased with the increase of soil TCs concentration.The ecological risks caused by antibiotic residues in farmland soils that have been extensively used with livestock manure for a long time should be taken seriously. |
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