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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (6): 191-194.doi: 10.11924/j.issn.1000-6850.2012-2647

所属专题： 园艺

• 植物保护 农药 • 上一篇    下一篇

3种桉树叶提取物除草活性研究

王静 王磊 李永青 唐志花 刘鑫龙 武云杰 查友贵   

  • 收稿日期:2012-07-30 修回日期:2012-09-18 出版日期:2013-02-25 发布日期:2013-02-25
  • 基金资助:
    云南省教育厅基金项目 “桉树叶对农业有害生物的化感作用研究” (07Y40071)。

Study on Herbicidal Activity of Three Eucalypt Leaf Extracts

  • Received:2012-07-30 Revised:2012-09-18 Online:2013-02-25 Published:2013-02-25

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摘要： 研究大叶桉、蓝桉、直杆蓝桉3种桉树叶提取物的除草活性，比较其活性差异，为以桉树为资源开发除草剂奠定基础，为桉树资源的综合开发利用提供理论依据。以指示植物高粱、小麦、油菜、黄瓜为测试对象，采用种子萌发法，测定3种桉树叶提取物对其幼苗根长和茎长的影响，并评价其除草活性。3种桉树叶提取物对高粱、小麦、黄瓜、油菜幼苗根长和茎长均有较强的抑制作用，对高粱根长IC50分别为0.5076、0.5540、0.6493 mg/mL，茎长IC50分别为0.5187、0.5811、0.6882 mg/mL；对小麦根长IC50分别为0.5117、0.6717、0.9062 mg/mL，茎长IC50分别为0.4448、0.4740、1.5659 mg/mL；对黄瓜根长IC50分别为1.7126、2.3397、1.8512 mg/mL，茎长IC50分别为3.0538、2.0922、4.0444 mg/mL；对油菜根长IC50分别为0.0258、0.8069、0.9425 mg/mL，茎长IC50分别为0.2462、1.3375、1.4521 mg/mL。3种桉树叶提取物对高粱、小麦、黄瓜、油菜幼苗根长和茎长均有较强的抑制作用，均具有较强的除草活性，其中，大叶桉叶提取物除草活性最强，蓝桉次之，直杆蓝桉最弱，若以桉树为资源开发除草剂，宜种植大叶桉。

关键词: 褐化, 褐化

Abstract: The paper was to study and compare herbicidal bioactivities of the three eucalypt leaf extracts, so as to lay the foundation for research and development of herbicides, and comprehensive development and utilization of eucalypt. Three eucalypt leaf extracts were bioassayed by seed germination method with sorghum (Sorghum vulgare), wheat (Triticum aestivum), cucumber (Cucumis sativus) and rape (Brassica campestris) as indicators, and the affection of the length of the roots and the stems were studied. All the three extracts showed strong inhibition effect to the roots and the stems of the four indicators, and the IC50 were 0.5076, 0.5540, 0.6493 mg/mL against the roots, and 0.5187, 0.5811, 0.6882 mg/mL against the stems of sorghum; and 0.5117, 0.6717, 0.9062 mg/mL against the roots，and 0.4448, 0.4740, 1.5659 mg/mL against the stems of wheat; and 1.7126, 2.3397, 1.8512 mg/mL against the roots，and 3.0538, 2.0922, 4.0444 mg/mL against the stems of cucumber; and 0.0258, 0.8069, 0.9425 mg/mL against the roots，and 0.2462, 1.3375, 1.4521 mg/mL against the stems of rape. All the three extracts showed high herbicidal activity, among which the extracts of Eucalyptus robusta showed the highest herbicidal activity, then followed Eucalyptus globulus, and Eucalyptus maideni the lowest. So if eucalypt was used as resource to develop herbicides, Eucalyptus robusta should be planted.