Acta Agrestia Sinica

Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (4): 1016-1025.DOI: 10.11733/j.issn.1007-0435.2023.04.010

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Allelopathy Effects of Miscanthus on Seed Germination and Seedling Growth of Three Weeds

XIAO Jing1,2,3, CHEN Na1, ZHOU Xiao-wei4, LUO Bo-lun5, YI Zi-li1,2,3, XUE Shuai1,2,3   

  1. 1. Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, College of Bioscience & Biotechnology, Hunan Agricultural University, Changsha, Hunan Province 410128, China;
    2. Hunan Engineering Laboratory of Miscanthus Ecological Applications, Hunan Agricultural University, Changsha, Hunan Province 410128, China;
    3. Hunan Branch, National Energy R & D Center for Non-food Biomass, Hunan Agricultural University, Changsha, Hunan Province 410128, China;
    4. School of Life Sciences, Central South University, Changsha, Hunan Province 410128, China;
    5. College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
  • Received:2022-10-31 Revised:2022-12-17 Published:2023-04-28

芒属植物对3种杂草种子萌发与幼苗生长的化感效应研究

肖晶1,2,3, 陈娜1, 周晓溦4, 罗博伦5, 易自力1,2,3, 薛帅1,2,3   

  1. 1. 作物种质创新与资源利用重点实验室, 湖南农业大学生物科学技术学院, 湖南 长沙 410128;
    2. 芒属植物生态应用技术 湖南省工程实验室, 湖南农业大学, 湖南 长沙 410128;
    3. 国家能源非粮生物质原料研发中心湖南分中心, 湖南农业大学, 湖南 长沙 410128;
    4. 中南大学生命科学学院, 湖南 长沙 410128;
    5. 中国农业大学农学院, 北京 100193
  • 通讯作者: 薛帅,E-mail:xue_shuai@hunau.edu.cn
  • 作者简介:肖晶(1999-),女,汉族,湖南邵阳人,硕士研究生,主要从事生态遗传学研究,E-mail:2315054642@qq.com
  • 基金资助:
    作物种质创新与资源利用重点实验室开放项目(19KFXM04)；湖南创新型省份建设项目(2019 NK2011 & 2019RS1051)资助

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Abstract: The study was designed to explore the allelopathic effects of the extracts from root,stem and leaf of different Miscanthus species. The allelopathic effects were expressed by the effects of extracts on the seed germination and seedling growth of three weeds,Celosia argentea,Amaranthus tricolor and Echinochloa crusgalli. The results showed that significant(P<0.05) allelopathic effects were found out on the indicators of seeds germination rate,germination index,hypocotyl length,radicle length and seedling dry weight. However,some differences in responses were identified out among the three weeds. A general trend of the results were that seed germination and seedling growth of C. argentea and E. crusgalli were improved by the tested Miscanthus extracts,while A. tricolor were inhibited by the treatment of M. lutarioriparius extract. The allelopathic effect of M. sinensis was the strongest,followed by M. floridulus,M.×giganteus and M. lutarioriparius. There were different allelopathic effects among the extracts from different parts of Miscanthus. Root extract of Miscanthus was more potent than leaf extract and stem extract. In summary,according to the synthetical allelopathic effect (SE) on the seed germination and seedling growth,the susceptibility of three texted weed species to the extracts of different parts of Miscanthus was C. argentea>E.crusgalli>A. tricolor.

Key words: Miscanthus, Allelopathy, Seed germination, Seedling growth

摘要： 为了探究芒属植物(Miscanthus spp.)的化感效应和作用规律，本试验采用室内生物学测定方法，研究南荻(Miscanthus lutarioriparius)、芒(Miscanthus sinensis)、五节芒(Miscanthus floridulus)、奇岗(Miscanthus×giganteus)不同部位(根、茎、叶)浸提液对青葙(Celosia argentea)、苋(Amaranthus tricolor)、稗(Echinochloa crusgalli)3种杂草种子的萌发与幼苗生长的影响。结果表明：不同种芒草根、茎、叶浸提液对3种杂草发芽率、发芽指数、胚轴长、胚根长、幼苗干重具有显著的化感作用(P<0.05)，且3种杂草之间存在一定的差异，不同种芒草浸提液对青葙、稗的化感效应整体表现为促进作用，而南荻浸提液对苋表现为抑制作用；不同芒草浸提液对3种杂草化感效应表现为芒>五节芒>奇岗>南荻；芒草不同部位浸提液间的化感效应不同，表现为根浸提液>叶浸提液>茎浸提液。结合种子萌发与幼苗生长的综合化感指数，3种受试植物对不同芒草不同部位化感作用的敏感程度为青葙>稗>苋。

关键词: 芒属植物, 化感作用, 种子萌发, 幼苗生长

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