26种除草剂对斜生栅藻的生长抑制活性

摘要

Objective] To determine the inhibitory activities of 26 kinds of herbicides against the growth of Scenedesmus oblique.[Method] Absorption spectrophotometry method was used to detect the inhibitory activities of 26 kinds of herbicides against the growth of S.oblique. [Result] Among the 26 kinds of herbicides, nine herbicides were low toxicity to S.oblique, seven were moderate toxicity, and ten were highly toxicity.Herbicides with high and moderate toxicity accounted for 65.4%.[Conclusion] Herbicides have relatively great ecotoxicity to algae, which should be used carefully.%[目的]明确不同种类除草剂对藻类植物的生态毒性等级。[方法]采用吸光度法测定26种常用除草剂对斜生栅藻（ Scenedesmus obliquus）的生长抑制活性。[结果]26种除草剂中有9种对斜生栅藻为低毒，7种为中毒，10种为高毒，中高毒品种占65．4％。[结论]除草剂对藻类存在较大的生态毒性，应慎重选择使用。