Abstract

The present study investigated integrated effects of two allelopathic plant water extracts (WE) (Ambrosia artemisiifolia [AMBEL] and Xanthium strumarium [XANST]) and a herbicide (mesotrione) on morphological (height and fresh weight of plants) and physiological (pigments content) parameters of Abutilon theophrasti and Chenopodium album. Also, the study aimed to identify the main components of AMBEL and XANST WE and to evaluate their potential allelopathic effects. Of the 18 investigated compounds, 13 were detected in both tested WE, and p-coumaric acid was the leading component in AMBEL, while quinic acid was the predominant component of XANST. The WE of both weed species and their mixtures with the herbicide exhibited more powerful allelopathic effects on fresh weight and content of pigments than on the height of A. theophrasti and C. album. The results showed that all measured parameters of both weeds were inhibited in treatments with mesotrione and its mix with AMBEL and XANST WE. The data revealed a highly significant difference in effects (P < 0.05) between control weeds and those treated with AMBEL WE and mesotrione, where the inhibition of fresh weight was over 90%, while the inhibition of pigments content exceeded 80%, and plant height was inhibited by over 70%.

摘要

本研究调查了两种化感植物水提取物（WE）（青蒿（Ambrosia artemisiifolia [AMBEL]和Xanthium strumarium [XANST]）和除草剂（甲基磺草酮）对形态（植物的身高和鲜重）和生理（色素含量）的综合作用。util麻和藜碱的参数。此外，该研究旨在确定AMBEL和XANST WE的主要成分并评估其潜在的化感作用。在研究的18种化合物中，测试的WE和p中均检测到13种-香豆酸是AMBEL的主要成分，而奎宁酸是XANST的主要成分。两种杂草的WE及其与除草剂的混合物对鲜重和色素含量的化感作用均比对A. theophrasti和C. album的高度更强。结果表明，在甲基磺草酮及其与AMBEL和XANST WE的混合物中，两种杂草的所有测定参数均受到抑制。数据表明 ，对照杂草与用AMBEL WE和甲基磺草酮处理的杂草之间的效果差异极显着（P <0.05），其中鲜重抑制超过90％，而色素含量抑制超过80％，株高被抑制超过70％。