常见抗生素对蔬菜种子萌发和幼苗生长的影响
毕业论文关键词：抗生素；蔬菜种子；发芽率；根长；芽长
Effects of Different Antibiotic on the Seed Germination and the Seedling Growth of Five species b vgetasbles
Abstract： Because of the abuse of antibiotics, now China is facing a serious problems. The abuse of antibiotics leads to antibiotics pollution of the natural environment, thus affects the growth of plants. Through the determination of germination rate, root length, bud length, shoot length, seedling fresh weight and dry weight of the crops, an experiment was carried out to explore the effects of different concentrations (25 mg/L, 50 mg/L, 100 mg/L, 200 mg/L, the control of 0 mg/L) of antibiotics (Levofloxacin hydrochloride, penicillin and azithromycin and cefazolin sodiumon ) the seed germination and seedling growth of 4 species vegetables (radish, Chinese little greens, Shanghai green and pod pepper). The results showed that: 50 mg/L Levofloxacin hydrochloride and azithromycin treatment promoted the germination of radish seeds, the penicillin sodium and cefazolin significantly inhibited the germination of radish seeds; Four kinds of antibiotics are basically promoted Chinese little greens and Shanghai green seed germination; But penicillin sodium treatment completely inhibited the pod pepper seed germination, and the seed germination of radish, Chinese little greens, Shanghai were obviously inhibited Compared with the control; 50 mg/L Levofloxacin hydrochloride treatment, 50 mg/L and 100 mg/L penicillin sodium treatment , all azithromycin treatment and 200 mg/L cefazolin promoted the growth of radish sprouts; Four kinds of antibiotics treatment were significantly promoted the growth of roots and shoots Chinese little greens and Shanghai green seedlings; Levofloxacin hydrochloride and azithromycin treatment significantly inhibited the roots and shoots growth of pod pepper; Low concentration (25 mg/L) of penicillin sodium promoted the roots growth of pod pepper seedlings while high concentration (200 mg/L) inhibited the seedling growth of pod pepper. All Cefazolin treatment entirely promoted seedling growth of pod pepper. Levofloxacin hydrochloride treatment significantly reduced the radish seedling fresh weight. Azithromycin treatment significantly increased the fresh weight of radish seedlings. High concentration of penicillin sodium (> 25 mg/L) increased the radish seedling fresh weight and low concentration of cefazolin (< 200 mg/L) reduced the radish seedling fresh weight