作　　者： ; ; ; ; ; ; ;

机构地区： 揭阳职业技术学院

出　　处： 《湖南农业大学学报（自然科学版）》 2012年第4期413-416,共4页

摘　　要： 采用水蒸汽蒸馏法提取胜红蓟地上部挥发油,测定胜红蓟挥发物及其渣液对稗草、黑麦草和三叶鬼针草的化感作用。结果表明:胜红蓟挥发物对稗草、黑麦草和三叶鬼针草幼苗生长有显著抑制作用,稗草的根长、苗高和鲜质量分别比对照减少7.2%、8.3%和7.7%,黑麦草的根长、苗高和鲜质量分别比对照减少13.4%、22.7%和7.7%,三叶鬼针草根长、苗高和鲜质量的分别比对照减少20.0%、14.7%和33.3%;不同浓度胜红蓟渣液对稗草、黑麦草和三叶鬼针草幼苗生长也有显著抑制作用,且随浓度增大而增强,当胜红蓟渣液质量浓度为0.01、0.10和1.00 g/mL时,稗草根长比对照分别减少44.6%、91.6%和100.0%,苗高分别减少48.5%、78.1%和98.7%,鲜质量分别减少41.7%、58.3%和83.3%;黑麦草根长分别减少26.8%、65.8%和100%,苗高分别减少25.1%、69.1%和100%,鲜质量分别减少12.9%、48.4%和100.0%;三叶鬼针草根长分别减少26.0%、68.5%和100.0%,苗高分别减少19.8%、46.8%和100.0%,鲜质量分别减少28.6%、57.1%和100.0%。 The allelopathic potentials of volatiles and liquid residue of Ageratum conyzoides L. on Echinochloa crusgalli L., Lolium perenne L. and Bidens pilosa L. were investigated. The results showed that the volatiles released from leaves and stems ofA. conyzoides in an airproof system significantly inhibited the seedling growth ofE. crusgalli, L. perenne and B. pilosa. Compared to the control, root length, shoot length and fresh weight ofE. crusgalli were decreased by 7.2%, 8.3% and 7.7%, respectively, ofL. perenne by 13.4%, 22.7% and 7.7%, respectively, and ofB. pilosa by 20.0%, 14.7% and 33.3%, respectively. Liquid residue ofA. conyzoides also significantly inhibited the seedling growth of the three tested weed species and the inhibition was enhanced with increasing concentration. When liquid residue concentrations were 0.01 g/mL, 0.10 g/mL and 1.00 g/mL, root length of E. crusgalli was decreased by 44.6%, 91.6% and 100.0%, respectively, ofL. perenne by 26.8%, 65.8% and 100.0%, respectively, and ofB. pilosa by 26.0%, 68.5% and 100%, respectively; shoot length of E. crusgalli was decreased by 48.5%, 78.1% and 98.7%, respectively, of L. perenne by 25.1%, 69.1% and 100.0%, respectively, and orB. pilosa by 19.8%, 46.8% and 100.0%, respectively; fresh weight orE. crusgalli was decreased by 41.7%, 58.3% and 83.3%, respectively, of L. perenne by 12.9%, 48.4% and 100.0%, respectively, and orB. pilosa by 28.6%, 57.1% and 100.0%, respectively, compared to the control.

关 键 词： 胜红蓟 挥发物 渣液 化感作用 杂草

领　　域： [生物学] [农业科学]