摘要
[Objectives]This study was conducted on the effects of veterinary antibiotics on pasture growth.[Methods]With alfalfa ( Medicago sativa L.) as an experimental material and oxytetracycline,chlortetracycline and enrofloxacin as experimental contaminants,the effects of the three veterinary antibiotics on the germination percentage,germination energy,germination index and vigor index of alfalfa seeds and on the plant height and root length of alfalfa seedlings were study at the concentration gradient of 50,100,150,200 and 250 mg/L,respectively.[Results]The oxytetracycline treatments had no significant effect on the germination percentage of alfalfa seeds,but promoted its germination index.The chlortetracycline treatment solutions and enrofloxacin treatment solutions promoted the germination percentage,germination energy and germination index of alfalfa.The three antibiotics significantly inhibited the vigor index of alfalfa seeds,and had significant inhibitory effects on root length and plant height.[Conclusions]These results provide an important basis for studying the ecotoxicity of veterinary antibiotics on pasture.
[Objectives] This study was conducted on the effects of veterinary antibiotics on pasture growth. [Methods] With alfalfa(Medicago sativa L.) as an experimental material and oxytetracycline, chlortetracycline and enrofloxacin as experimental contaminants, the effects of the three veterinary antibiotics on the germination percentage, germination energy, germination index and vigor index of alfalfa seeds and on the plant height and root length of alfalfa seedlings were study at the concentration gradient of 50, 100, 150, 200 and 250 mg/L, respectively. [Results] The oxytetracycline treatments had no significant effect on the germination percentage of alfalfa seeds, but promoted its germination index. The chlortetracycline treatment solutions and enrofloxacin treatment solutions promoted the germination percentage, germination energy and germination index of alfalfa. The three antibiotics significantly inhibited the vigor index of alfalfa seeds, and had significant inhibitory effects on root length and plant height. [Conclusions] These results provide an important basis for studying the ecotoxicity of veterinary antibiotics on pasture.
基金
Supported by Higher Education of Changchun Normal University([2018]53)
