地桃花提取物对10种植物的抑制活性  

Inhibitory Effect of Urena lobata L. Extracts on 10 Plants

作　　者：魏进[1] 刘霞 张静[2] 戴长庚 陈才俊[1] 冯岗[2] WEI Jin;LIU Xia;ZHANG Jing;DAI Chang-geng;CHEN Cai-jun;FENG Gang(Guizhou Institute of Plant Protection,Guizhou Academy of Agricultural Sciences,Guiyang 550006,China;Environment and Plant Protection Institute,Chinese Academy of Tropical Agricultural Science,Haikou 571101,China)

机构地区：[1]贵州省农业科学院植物保护研究所,贵州贵阳550006 [2]中国热带农业科学院环境与植物保护研究所,海南海口571101

出　　处：《杂草学报》2018年第3期24-28,共5页Journal of Weed Science

基　　金：中央级公益性院所基本科研业务费专项(编号:2016hzs1J058);贵州省科学技术基金(编号:黔科合J字LKN[2013]14号)

摘　　要：为探讨地桃花提取物对植物是否有抑制作用,采用培养皿滤纸法和室内盆栽法测定地桃花提取物对稗等10种植物的抑制活性。结果表明,在10 mg/mL处理下,地桃花提取物对稗和刺苋的抑制效果最高,根长抑制率分别为80. 24%、74. 42%,茎长抑制率分别为72. 07%、93. 63%,根长EC50分别为0. 476、0. 642 mg/mL,茎长EC50分别为0. 380、0. 195 mg/mL;1 mg/mL处理下,地桃花提取物对稗和刺苋的抑制效果稍差,根长抑制率分别为62. 59%、53. 29%,茎长抑制率分别为56. 17%、78. 65%。盆栽结果显示,当供试浓度为10 mg/mL时,地桃花提取物对稗和刺苋具有较强的抑制效果,处理后7 d的防治效果分别为62. 01%、75. 70%。说明地桃花提取物具有潜在的除草活性,值得进一步深入研究,为地桃花作为一种天然的除草剂和生长抑制剂提供更科学的依据。The possible growth inhibitory effects of Urena lobata extracts were assessed with ten target plants,including Echinochloa crus-galli(Linn.)Beauv.,using filter-paper petri-dish and indoor pot-culture bioassays.The extracts had the highest herbicidal activity against E.crus-galli and Amaranthus spinosus Linn.at a concentration of 10mg/mL,with root and foliage growth-inhibition rates of 80.2%,72.1% and 74.4%,93.6%,and EC50 values for root and foliage of 0.48,0.64mg/mL and 0.38,0.20mg/mL,respectively.At a concentration of 1mg/mL,the extracts only had a low herbicidal activity on the two species,with inhibition rates for roots and shoots of 62.6%,56.2% and 53.3%,78.6%,respectively.Therefore,extract of U.lobata have potential herbicidal activity,deserving further research to establish a scientific basis for using U.lobata as a natural herbicide or growth inhibitor.

关 键 词：地桃花 提取物 抑制活性 培养皿滤纸法 室内盆栽法 

分 类 号：S482.4[农业科学—农药学]