作　　者： ; ; ; ; ;

机构地区： 中华人民共和国环境保护部

出　　处： 《农业环境科学学报》 2014年第6期1095-1099,共5页

摘　　要： 为研究有机肥中残留抗生素在土壤-蔬菜体系中的迁移，采用盆栽试验研究了小白菜和白萝卜对四环素类抗生素的吸收富集情况。结果表明：小白菜、白萝卜对4种抗生素均有吸收，作物组织中抗生素的浓度随土壤中浓度的升高而增加，表现出显著的正相关。当粪肥中抗生素浓度由20 mg·kg-1增加到50 mg·kg-1时，小白菜茎叶中4种抗生素的含量分别增加了67％（四环素，TC）、105％（土霉素，OTC）、71％（金霉素，CTC）和83％（强力霉素，DC），其最高含量分别为（51.56±8.85）（TC）、（31.89±4.29）（OTC）、（37.58±5.84）（CTC）、（17.73±2.39）（DC）μg·kg-1，萝卜组织中4种抗生素的含量分别增加了58％（TC）、41％（ OTC）、88％（CTC）和24％（DC），其最高含量分别为（13.93±1.96）（TC）、（14.39±1.16）（OTC）、（17.30±3.05）（CTC）、（8.86±1.28）（DC）μg·kg-1。土壤性质影响抗生素向作物中的迁移，红壤处理与砂壤处理比，4种抗生素在萝卜茎叶与小白菜茎叶中的浓度分别降低了11％~44％和21％~47％。 Veterinary antibiotics may enter soil-plant system via soil applications of animal manure, posing risks to human health. A mi-croplot experiment was conducted in greenhouse to investigate the uptake of selected four tetracycline antibiotics, including tetracycline（TC）, oxytetracyline（OTC）, chlortetracycline（CTC）, and doxytetracyline（DC）by pakchoi and radish grown in a manure-amended soil. Treat-ments were 0, 5, 20, 50 mg antibiotics kg-1 of manure. The manure was applied at a rate of 20 000 kg·hm-2. Both crops took up four antibiotics during 35 d（pakchoi）and 50 d（radish）periods. Concentrations of the antibiotics in plant increased with increasing antibiotics in soils, and they showed a significant positive correlation. When the concentrations of antibiotics in manure were increased from 20 mg·kg-1 to 50 mg·kg-1, the concentrations of four antibiotics in plants were increased by 67%（TC）, 105%（OTC）, 71%（CTC）, and 83%（DC）for pakchoi and 58%（TC）, 41%（OTC）, 88%（CTC）, and 24%（DC）for radish. The maximum concentration was（51.56±8.85）（TC）,（31.89±4.29）（OTC）, （37.58±5.84）（CTC）, and（17.73±2.39）（DC）μg·kg-1 in pakchoi and（13.93±1.96）（TC）,（14.39± 1.16）（OTC）,（17.30± 3.05）（CTC）, and（8.86± 1.28）（DC）μg·kg-1 fresh weight in radish. Soil properties greatly affected the uptake of four tetracycline antibiotics by crops. Compared to sandy loam soil, concentrations of antibiotics in radish and pakchoi cultivated in red soil decreased by 11%~44%and 21%~47%, respectively. These results indicate that consuming produces from soils amended with manures containing low-levels of antibiotics might pose potential risks to human health.

关 键 词： 吸收 作物 四环素 土霉素

领　　域： [环境科学与工程]