烟草幼苗对土霉素的吸收、累积及对其生长的影响

为探究抗生素这种新型的环境污染物，通过水、土壤和有机肥料进入到烟草生产环境中后是否会被烟草吸收，并在烟株体内积累，影响烟株的生长发育，造成烟叶质量下降，本研究选取一种较为典型的抗生素（土霉素），研究其在烟苗中的累积与分布及对烟苗生长的影响，结果表明：该抗生素表现出抑制烤烟幼苗生长发育的趋势，且随着处理时间和浓度的增加，烤烟幼苗的根、茎、叶吸收土霉素的含量增加，这表明环境中的抗生素不仅可以被烟株吸收并在其体内积累，且对烟株的生长发育有负面作用。

Distribution, accumulation and effect of oxytetracycline in tobacco seedlings

In order to explore whether this new type of environmental pollutant, which is a new type of antibiotic, will be absorbed by tobacco after entering the tobacco production environment through water, soil and organic fertilizer, and accumulate in the tobacco plant, affecting the growth and development of tobacco plants and causing the quality of tobacco leaves to decrease, this study selects a more typical antibiotic (chlortetracycline) to study its accumulation and distribution in tobacco seedlings and its impact on the growth of tobacco seedlings, and the results show that the antibiotic shows a trend of inhibiting the growth and development of flue-cured tobacco seedlings, and with the increase of treatment time and concentration, the roots of flue-cured tobacco seedlings are selected. The content of oxytetracycline absorbed by stems and leaves increased, and the accumulation of oxytetracycline in the roots, stems and leaves of flue-cured tobacco seedlings also increased, indicating that antibiotics in the environment can not only be absorbed by tobacco plants and accumulate in their bodies, but also have a negative effect on the growth and development of tobacco plants.