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以小麦为供试生物,采用高等植物毒理诊断试验方法研究了土壤外源环丙沙星和铜复合污染对小麦早期生长的影响,以探讨粪源污染土壤潜在的生态风险。结果表明:在供试浓度范围内,铜和环丙沙星单一污染下,小麦种子早期生长指标均产生了不同程度的响应,其中芽长和根长主要表现为抑制效应,而小麦种子发芽率未受影响;指标对污染物反应敏感顺序为芽长>根长>发芽率、环丙沙星与铜复合污染对小麦根长和芽长的影响表现出不同的效应;20和80 mg·kg-1铜与环丙沙星复合时相对单一作用对小麦根长的抑制有毒性增强的趋势,表现为协同效应;而200 mg·kg-1单一铜处理对小麦芽长的抑制效应在与环丙沙星复合后有所缓解,表现为拮抗特征;环丙沙星和铜在环境介质中交互作用产生络合物可能是导致不同生物效应的原因。
Taking wheat as the test organism, the effect of exogenous ciprofloxacin and copper compound contamination on early wheat growth was studied by using advanced plant toxicology diagnostic test method to explore the potential ecological risk of contaminated soil by manure source. The results showed that under the single concentration of copper and ciprofloxacin, the early growth indexes of wheat seeds all had different degrees of response in the concentration range of test, in which the shoot length and root length mainly showed the inhibitory effect, but the seed germination rate The results showed that the responses of the indicators to the pollutants were bud length> root length> germination rate. The effects of ciprofloxacin and copper contamination on root length and bud length of wheat showed different effects; 20 and 80 mg · kg -1 copper complexed with ciprofloxacin showed a synergistic effect on the single root growth inhibition of wheat root, while the inhibitory effect of 200 mg · kg-1 single copper treatment on wheat bud length increased with the increase of Ciprofloxacin showed some antagonism after being complexed, and the interaction between ciprofloxacin and copper in the environmental medium could be the reason of different biological effects.