26种除草剂对斜生栅藻的生长抑制活性

Inhibitory Activity of 26 Herbicides against the Growth of Scenedesmus obliquus

[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。

[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.