摘要
在鮰鱼养殖条件下,每天以剂量为20 mg/kg和40 mg/kg恩诺沙星药饵连续饲喂5 d,研究恩诺沙星及其代谢产物在底泥和水体中降解与分布规律。研究结果表明,低剂量组和高剂量组在水体中达峰值时间是第五天和第七天,在底泥中达峰值时间都在第七天。其中在低剂量组的养殖水体中恩诺沙星的残留量为621.7 ng/L,底泥中恩诺沙星和环丙沙星的残留量分别为135.6 ng/g和9.0 ng/g;在高剂量组的养殖水体中恩诺沙星的残留量分别738.9 ng/L,底泥中恩诺沙星和环丙沙星的残留量分别为228.5 ng/g和23.3 ng/g。第29天后,低剂量组水体中恩诺沙星含量达到最低值9.3 ng/L,高剂量组是16.2 g/L;低剂量组底泥中恩诺沙星和环丙沙星含量达到最低值7.3 ng/g和2.9 ng/g,高剂量组是18.6 ng/g和4.4 ng/g。对比低剂量组和高剂量组之间恩诺沙星及其代谢产物环丙沙星分布规律,发现第29天,底泥中呈现恩诺沙星和环丙沙星的规律性动态平衡,而水体中未检出环丙沙星的变化。
The experiment was conducted to know the change of the content of enrofloxacin in aquaculture water and sludge of Ictalurus punctatus after feeding 20 mg/kg and 40 mg/kg enrofloxacin for 5 days.The results showed that the peaking time of enrofloxacin and ciprofloxacin occurred on 5th day and 7th day in water,respectively,but in sludge they all were on 7th day.The most important component of enrofloxacin in low concentration aquaculture water was 621.7 ng/L.The enrofloxacin and its metabolite ciprofloxacin were 135.6 ng/g and 9.0 ng/g in sludge,respectively.The most important component of enrofloxacin were 738.9 ng/L in high concentration aquaculture water.The contents of enrofloxacin and its metabolite ciprofloxacin were 228.5 ng/g and 23.3 ng/g in sludge,respectively.On the 29 days,there were came to the lowest values of 9.3 ng/L in low concentration in water,and they were 16.2 ng/L in high concentration.But in sludge,there were came to the lowest values of 7.3 ng/g and 2.9 ng/g in low concentration,and they were 18.6 ng/g and 4.4 ng/g in high concentration.Compared the distribution of enrofloxacin and its metabolite ciprofloxacin between low concentration group and high concentration group,it was found that there were a regular dynamic balance between enrofloxacin and ciprofloxacin on the 29th day,and the ciprofloxacin could not be detected in water.
作者
李邦平
孟勇
朱晓华
陈鑫
沈美芳
边文冀
Li Bangping;Meng Yong;Zhu Xiaohua;Chen Xin;Shen Meifang;Bian Wenji(Freshwater Fisheries Research Institute of Jiangsu Province,Nanjing 210017,China)
出处
《水产养殖》
CAS
2020年第1期16-21,共6页
Journal of Aquaculture
基金
江苏省现代渔业产业技术体系(JFRS-05)
现代农业产业技术体系专项(CARS-46)
