CAJ | 학술논문

应用急性毒性实验方法，对比研究硝磺草酮商品及其标准品对四尾栅藻（ Scenedesmus quadricauda）和微囊藻（Microcystis sp．）的生长及叶绿素a含量的影响，以了解新兴除草剂硝磺草酮对淡水微藻的毒性效应。结果表明：硝磺草酮商品及其标准品均能抑制四尾栅藻和微囊藻的生长，抑制程度与剂量正相关，且硝磺草酮商品的抑制作用更强；四尾栅藻和微囊藻在硝磺草酮商品处理5 d后的叶绿素a抑制率（27．8％～91．2％、27．2％～81．3％）高于标准品处理5 d后的叶绿素a抑制率（1％～51．2％、3．6％～52．6％），表明硝磺草酮商品的毒性高于其标准品；四尾栅藻对硝磺草酮商品及其标准品的敏感性高于微囊藻，在暴露初期其敏感性差异性最为明显，之后随暴露时间的延长而减小。
응용급성독성실험방법，대비연구초광초동상품급기표준품대사미책조（ Scenedesmus quadricauda）화미낭조（Microcystis sp．）적생장급협록소a함량적영향，이료해신흥제초제초광초동대담수미조적독성효응。결과표명：초광초동상품급기표준품균능억제사미책조화미낭조적생장，억제정도여제량정상관，차초광초동상품적억제작용경강；사미책조화미낭조재초광초동상품처리5 d후적협록소a억제솔（27．8％～91．2％、27．2％～81．3％）고우표준품처리5 d후적협록소a억제솔（1％～51．2％、3．6％～52．6％），표명초광초동상품적독성고우기표준품；사미책조대초광초동상품급기표준품적민감성고우미낭조，재폭로초기기민감성차이성최위명현，지후수폭로시간적연장이감소。
To understand the toxic effects of both commercial and standard mesotrione on the growth and chlorophyll a content of Microcystis sp.andScenedesmus quadricauda,were investigated by means of acute toxici?ty experiment.The results indicated that the growth ofScenedesmus quadricauda andMicrocystis sp.were inhibited by both commercial and standard mesotrione,and significant correlation existed between the inhibition degree and the concentration.After 5 d,the chlorophyll a contents of Scenedesmus quadricauda andMicrocystis sp.were inhibited by 27.8%-91.2% and 27.2%-81.3% by commercial mesotrione,by 1%-51.2% and 3.6%-52.6%by standard mesotrione,respectively.The toxicity of commercial mesotrione was higher than that of standard me?sotrione.Scenedesmus quadricauda was more sensitive than Microcystis sp.to both the compounds.