4种拟除虫菊酯类农药对海带生长及叶绿素a含量的影响  

Effects of four pyrethroid pesticides on the growth and Chl a content of Laminaria japonica

作　　者：郑惠东[1] ZHENG Huidong(Fisheris Research Institute of Fujian,Key Laboratory of Cultivation and High-value Utilization of Marine Organisms in Fujian Province,Xiamen 361013,China)

机构地区：[1]福建省水产研究所、福建省海洋生物增养殖与高值化利用重点实验室,福建厦门361013

出　　处：《应用海洋学学报》2022年第4期663-670,共8页Journal of Applied Oceanography

基　　金：国家海洋局海洋公益性行业科研专项资助项目(201305043-4,201505034-4)。

摘　　要：为研究不同拟除虫菊酯类农药对海带(Laminaria japonica)生长和叶绿素a(Chl a)含量的影响,选取溴氰菊酯、联苯菊酯、氰戊菊酯、醚菊酯等4种拟除虫菊酯类农药,设置1、5、10、50、100、500μg/dm^(3)6个梯度对海带进行半静置染毒。结果表明:低浓度(1μg/dm^(3))组4种拟除虫菊酯类农药对海带生长均具有促进作用(P<0.05),高浓度(100、500μg/dm^(3))对海带生长具有显著抑制作用(P<0.01)。溴氰菊酯、联苯菊酯、氰戊菊酯、醚菊酯对海带的24 d半抑制效应浓度(EC 50)分别为82.4、53.0、10.7、14.6μg/dm^(3),抑制作用大小为氰戊菊酯≈醚菊酯>联苯菊酯>溴氰菊酯。低浓度(1、5μg/dm^(3))组海带体内Chl a含量均出现升高,具有一定促进作用(P<0.05);高浓度(100、500μg/dm^(3))组海带体内Chl a含量均出现明显下降,具有显著抑制作用(P<0.01),抑制作用大小为醚菊酯>氰戊菊酯>联苯菊酯>溴氰菊酯。4种拟除虫菊酯类农药对海带生长和Chl a含量的影响均表现为低浓度促进、高浓度抑制作用,且随着浓度升高和暴露时间延长,呈促进作用减弱,抑制作用增强之势。In order to study the effects of different pyrethroid pesticides on the growth and Chl a content of Lamina-ria japonica under sub-acute exposure,the experiment is set in 6 treatments with different doses of semi-static exposure(1,5,10,50,100 and 500μg/dm^(3),respectively).The results showed that 4 pyrethroids had promoted the growth of Laminaria japonica in low concentration group(1μg/dm^(3)).The growth of Laminaria japonica was significantly inhibited at high concentrations(100,500μg/dm^(3))(P<0.01).The 24-d median effective concentrations(EC 50)of deltamethrin,difenthrin,fenvalerate and dermethrin on Laminaria japonica were 82.4,53.0,10.7 and 14.6μg/dm^(3),respectively.The inhibitory effects were showed in orders of fenvalerate≈permethrin>pifenthrin>peltamethrin.Chl a content of Laminaria japonica increased in low concentration treatment(P<0.05),while it decreased significantly in high concentration treatment(P<0.01).The inhibitory effect was listed as follows:permethrin>fenvalerate>bifenthrin>deltamethrin.The algal growth and Chl a content were promoted in low concentration treatments of four pyrethroids while inhibited in high concentration treatments.The promoting effect decreased and the inhibiting effect increased with increasing concentration and exposure time.

关 键 词：海洋生物学 海带 拟除虫菊酯类农药 生长 叶绿素A 

分 类 号：P735[天文地球—海洋生物学]