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普通小球藻对嗪草酮、骠马和甲草胺的敏感性研究
引用本文:杨志强,董波,吴进才.普通小球藻对嗪草酮、骠马和甲草胺的敏感性研究[J].应用生态学报,2004,15(9):1621-1625.
作者姓名:杨志强  董波  吴进才
作者单位:扬州大学,扬州,225009
基金项目:国家自然科学基金资助项目 ( 3 0 170 162 )
摘    要:通过96h的毒性实验,研究了普通小球藻对3种不同作用机制农田常用除草剂嗪草酮、骠马和甲草胺的敏感性.结果表明。在实验条件下,嗪草酮、甲草胺对普通小球藻的毒性随时间的推移有加重趋势。并呈现很好的剂量效应关系;最高抑制生长浓度(嗪草酮0.24mg·L^-1,甲草胺12.8mg·L^-1)处理组的最大比增长率分别为对照组的12.38%和31.58%;骠马低浓度对普通小球藻的抑制作用不明显,并呈一定的生长促进效应,0.08mg·L^-1浓度组普通小球藻最大比增长率为对照组的111.44%,而高浓度则具有明显的生长抑制作用,并随时间推移,毒性逐渐减弱.嗪草酮、骠马和甲草胺的96hEC50分别为0.021、0.937和5.54mg·L^-1.普通小球藻对嗪草酮最敏感。其次为骠马和甲草胺.3种除草剂在实验条件下对普通小球藻叶绿素a含量的影响和对普通小球藻生长的影响相似。表现出较好的剂量.效应关系.

关 键 词:嗪草酮  骠马  甲草胺  普通小球藻  毒性  叶绿素
文章编号:1001-9332(2004)09-1621-05
修稿时间:2003年9月27日

Sensitivity of Chlorella vulgaris to metribuzin, puma and alachlor
YANG Zhiqiang,DONG Bo,WU Jincai.Sensitivity of Chlorella vulgaris to metribuzin, puma and alachlor[J].Chinese Journal of Applied Ecology,2004,15(9):1621-1625.
Authors:YANG Zhiqiang  DONG Bo  WU Jincai
Institution:Yangzhou University, Yangzhou 225009, China. yzyzq2@yzcn.net
Abstract:The relative sensitivities of Chlorella vulgaris to three commonly used herbicides metribuzin, puma and alachlor were determined by toxicity tests of 96-h static exposures. The results showed that the toxicities of metribuzin and alachlor to C. vulgaris increased with exposure time, and the density of C. vulgaris decreased with increasing concentrations of these two herbicides in the test media. The maximum specific growth rate of C. vulgaris exposed to metribuzin (0.24 mgL x L(-1)) and alachlor (12.8 mg x L(-1)) was 12.38% and 31.58% of the control, respectively. At low concentration, puma stimulated C. vulgaris growth, but at high concentration, it inhibited the growth significantly. The maximum specific growth rate of C. vulgaris under 0.08 mg x L(-1) puma was 111.44% of the control, and the toxicity of puma declined with increasing exposure duration. The EC50 value of metribuzin, puma and alachlor was 0.021, 0.937, and 5.54 mg x L(-1), respectively. The relative sensitivities of C. vulgaris to the three herbicides decreased in the order of metribuzin, puma and alachlor. The chlorophyll a content of C. vulgaris decreased with the increasing concentrations of metribuzin, puma and alachlor.
Keywords:Metribuzin  Puma  Alachlor  Chlorella vulgaris  Toxicity  Chlorophyll  
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