硫氰酸红霉素原位杀藻的生态学效应  

Ecological effects of erythromycin thiocyanate on inhibiting cyanobacteria in situ

作　　者：王雪莹 毕相东 董少杰 尤宏争[2] 刘克明[2] 戴伟 李宛津 WANG Xueying;BI Xiangdong;DONG Shaojie;YOU Hongzheng;LIU Keming;DAI Wei;LI Wanjin(Key Laboratory of Aqua-ecology and Aquaculture of Tianjin,Department of Fisheries Sciences,Tianjin Agricultural University,Tianjin 300384,China;Tianjin Fisheries Research Institute,Tianjin 300221,China)

机构地区：[1]天津农学院水产学院,天津市水产生态及养殖重点实验室,天津300384 [2]天津市水产研究所,天津300221

出　　处：《大连海洋大学学报》2020年第2期260-265,共6页Journal of Dalian Ocean University

基　　金：国家自然科学基金面上项目(31772857);天津市自然科学基金资助项目(17JCYBJC29500,18JCYBJC95900);天津市重点研发计划项目(19YFZCSN00070);天津市自然科学基金重点项目(18JCZDJC97800);天津中青年创新骨干人才项目。

摘　　要：为明确杀藻剂作用下生态围隔内蓝藻及微囊藻丰度、底泥微囊藻毒素(MCs)含量及关键水化学指标的动态变化规律,在蓝藻水华暴发期的淡水鱼类养殖尾水循环渠中,开展了硫氰酸红霉素原位杀藻的生态学效应研究。试验设置4个浓度(0.25、0.5、1、2 mg/L)的硫氰酸红霉素处理组和1个未添加硫氰酸红霉素的对照组,每组设3个平行,试验共进行10 d。结果表明:硫氰酸红霉素对生态围隔内蓝藻及微囊藻具有强烈的抑杀效应,试验结束时对蓝藻及微囊藻抑杀率均达99%以上;硫氰酸红霉素作用过程中生态围隔内底泥MCs含量呈现明显的先升高后降低趋势,最高值出现在第2天,MC-RR含量为2.58μg/g,MC-LR含量为3.39μg/g;使用硫氰酸红霉素应急抑杀蓝藻后,水体中NO-2-N、NO-3-N、NH+4-N及CODMn含量短时间内均有不同程度地提高,其中尤以NH+4-N与CODMn含量升高较为明显。综合考虑杀藻效果、底泥中MCs储积量及关键水化学指标变化规律,建议养殖生产中使用≤0.25 mg/L硫氰酸红霉素应急杀灭蓝藻,并在抑杀蓝藻后及时增氧、泼洒解毒剂及微生态制剂。Erythromycin thiocyanate was added into 15 cylindrical bottom sediment enclosures made of high density impermeable canvas and stainless steel iron frame in an circulating water channel with frequent cyanobacterial bloom outbreak at a dose of 0(control group),0.25,0.5,1 mg/L and 2 mg/L for 10 days to clarify the dynamic changes in cyanobacteria and Microcysis abundance,microcystin(MCs)content in sediment and key hydrochemical indicators under the action of algaecide agent.The erythromycin thiocyanate was shown to have very strong inhibitory effect in cyanobacteria and Microcysis in the ecological enclosure,with inhibitory rate of 99%at the end of experiment.There was increase in content of microcystin in sedimentt first and then decrease under the action of erythromycin thiocyanate,with the maximum MC-RR content of 2.58μg/g and MC-LR of 3.39μg/g at the second 2 d.The increase in contents of NO-2-N,NO-3-N,NH+4-N and CODMn was observed to some extent in a short time after emergency controlling of cyanobacteria bloom by erythromycin thiocyanate,especially the content of NH+4-N and CODMn.Considering the algaecide effect,MCs storage in sediment and the change rule of key hydrochemical indices,it is recommend that erythromycin thiocyanate be applied at a dose of 0.25 mg/L to control cyanobacteria bloom in emergency,accompanied by operating aerators,and administration of probiotics in aquaculture.

关 键 词：硫氰酸红霉素 蓝藻 微囊藻毒素 生态学效应 

分 类 号：S947[农业科学—水产养殖]