首页> 中文期刊> 《安徽农业科学》 >2种常用除草剂对1株稻田固氮念珠藻的毒性效应研究

2种常用除草剂对1株稻田固氮念珠藻的毒性效应研究

         

摘要

[目的]评价除草荆对固氮蓝藻的毒性.[方法]以稻田固氮蓝藻念珠藻FACHB85为供试藻种,研究除草剂莠去津和丁草胺的毒性效应.[结果]莠去津对FACHB85的毒性存在明显的剂量-效应关系,0.8 mg/L莠去津可明显抑制藻体生长(藻体比生长速率仅为对照的25%,且藻体断裂严重);在试验期(15 d)内莠去津对FACHB85的EC值为0.035~0.080 mg/L,12 d后其EC值达到稳定且高于前5 d的EC值;随莠去津浓度增加,FACHB85的异形胞频率逐渐减小.在试验浓度(0~640 mg/L)范围内,丁草胺对FACHB85的生长基本无影响,且不同浓度丁草胺处理FACHB85的异形胞频率无显著差异.[结论]莠去津对FACHB85具有很强的毒性,而丁草胺对FACHB85的毒性较小.%[ Objective ] The purpose was to evaluate the toxicity of herbicides on nitrogen fixation cyanobacterium. [ Method ] With nitrogen fixation cyanobacterium Nostoc FACHB85 in paddy field as tested alga strain,the toxic effects of herbicides atrazine and butachlor was studied. [Result] The toxicity of atrazine on FACHB85 showed obvious dose-effect relationship. Atrazine of 0.8 mg/L could inhibit the growth of frond obviously,its specific growth rate was just 25% of that of CK and it had serious fragmentations. In the experimental period of 15 d, the EC50 of atrazine on FACHB85 was 0.035 - 0.080 mg/L,its EC50 became stable and higher than that of the former 5 d after 12 d; as the concentration of atrazine was increased, the heterocyst frequency of FACHB85 was reduced gradually. In the tested concentration scope of 0 ~ 640 mg/L,butachlor showed no influence on the growth of FACHB85 basically and the heterocyst frequencies of FACHB85 treated with butachlor of different concentration showed no obvious difference. [ Conclusion ] The toxicity of atrasine on FACHB85 was very intense and that of butachlor was less.

著录项

  • 来源
    《安徽农业科学》 |2011年第8期|4478-44814515|共5页
  • 作者单位

    华南农业大学农业部生态农业重点开放实验室;

    广东广州;

    510642;

    广东省渔业生态环境重点实验室;

    广东广州;

    510300;

    广东省高等学校农业生态与农村环境重点实验室;

    广东广州;

    510642;

    广东省渔业生态环境重点实验室;

    广东广州;

    510300;

    中山市农产品质量监督检验检测中心;

    广东中山;

    528403;

    华南农业大学农业部生态农业重点开放实验室;

    广东广州;

    510642;

    广东省高等学校农业生态与农村环境重点实验室;

    广东广州;

    510642;

    华南农业大学农业部生态农业重点开放实验室;

    广东广州;

    510642;

    广东省高等学校农业生态与农村环境重点实验室;

    广东广州;

    510642;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 除草剂(杀草剂);
  • 关键词

    莠去津; 丁草胺; 念珠藻; 毒性;

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