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| DOI：10.13522/j.cnki.ggps.2017.0524 |
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| Decay of Tetracycline Antibiotics and the Growth of Maize in Soil Amended with Chicken Manure |
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QIN Junmei, XIONG Huaye, LI Zhaojun
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（1. College of Resources and Environment, Shanxi Agricultural University, Taigu 030801, China;2. Ministry of Agriculture Key Laboratory of Plant Nutrition and Nutrient Cycling, Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences, Beijing 100081, China）
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| Abstract: |
| 【Objective】 Livestock manure contains antibiotics and its application to soil could affect plant growth and proliferation of antibiotic resistance genes. The purpose of this paper is to experimentally study how soil amended with chicken manure containing tetracyclines (tetracycline, oxytetracycline and chlortetracycline) antibiotics impacts growth of maize and the decomposition of the antibiotics in soil. 【Method】 Pot experiments grown with maize were carried out with the soil amended with two types of chicken manure: one was manure excrement of chicken without being fed tetracycline (I), oxytetracycline and chlortetracycline, and the other one is manure of chicken fed with these antibiotics (II). The experiment consisted of seven treatments:①control (CK); ②adding 6.4 g/kg of chicken manures I; ③adding 6.4 g/kg of chicken manures II; ④adding 12.8 g/kg of chicken manures I; ⑤adding 12.8 g/kg of chicken manures II; ⑥adding 25.6 g/kg of chicken manures I; ⑦adding 25.6 g/kg of chicken manures II. 【Result】 The plant height, root length, biomass and CCI under Treatments 2, 4 and 6 were higher than those under Treatments 1, 3 and 5. The differences between the Treatments 4 and 3, the Treatments 6 and 5 were significant (p<0.05). The residuals of tetracycline and doxycycline were found in root, stem, leaf; and tetracycline was also found in the grain. We also detected aureomycin in stem, leaves and seeds. The concentration of tetracycline and aureomycin found in different tissues of the plant was ranked in grainstem>root. The antibiotics taken up by plants was ranked in tetracycline>aureomycin>oxytetracycline based on their mass found in the plant. The transfer coefficient of aureomycin in the canopy was higher than that of doxycycline and tetracycline. The residual of the antibiotics remained in soil after the experiment was tetracycline>oxytetracycline＞aureomycin. 【Conclusion】 The antibiotics in chicken manure could imped the growth of the maize compared with the manure that did not contain antibiotics under the same conditions. However, increasing the chicken manure application not only reduced the inhibition of the maize growth, but also decreased the residuals of tetracycline and aureomycin in different organs of the maize. |
| Key words: tetracycline antibiotics; chicken manure; maize; residuals of antibiotics in soil |
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