中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

小麦对直播稻田千金子的化感作用及化感物质分离鉴定

董立尧;王鸣华;武淑文;沈晋良*   

  1. 南京农业大学 植物保护学院， 农业部病虫监测与治理重点开放实验室， 江苏 南京 210095
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-11-10 发布日期:2005-11-10

Isolation and Identification of Allelochemicals from Wheat and Allelopathy on Leptochloa chinensis in Direct-Seeding Rice Field

DONG Li-yao , WANG Ming-hua , WU Shu-wen , SHEN Jin-liang
  

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-11-10 Published:2005-11-10

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被引次数

70

摘要： 研究了小麦茎根水提取液对直播稻田千金子的化感作用，并分离鉴定了化感物质。结果表明：扬麦158和扬麦10号不同生育期的水提取液对千金子种子萌发均有抑制作用，但对幼苗生长无抑制作用；对水稻种子萌发及幼苗生长均无抑制作用；利用室内生测及GCMS分析鉴定抑制千金子种子萌发的化感物质为有机酸，对千金子种子萌发的抑制率达94.90%，有机酸的主要成分为棕榈酸、油酸、亚油酸、硬脂酸及肉豆蔻酸。

关键词: 小麦, 千金子, 化感作用, 化感物质, 直播稻田, 杂草防治

Abstract: Allelopathy effects of aqueous extracts from culms and roots of wheat on Leptochloa chinensis (L.) Nees in direct-seeding rice field was investigated and allelochemicals were isolated and identified. The bioassay results showed that aqueous extracts from different varieties of wheat had no allelopathy effects on rice seedling growth, but on seed germination of L. chinensis, which were safe to the seed germination and seedling growth of rice. Allelochemicals from wheat, which could inhibit the seed germination of L. chinensis, were isolated and identified by use of gas chromatography mass spectrometry (GC-MS) method. It was suggested that organic acid, which were composed of oleic acid, palmific acid, myristic acid, linoleic acid, stearic acid, exhibited great allelopthic potential.

Key words: wheat, Leptochloa chinensis, allelopathy, allelochemicals, direct-seeding rice field, weed control