为探讨香根草能否作为桉树人工林可选的林下经济植物,通过土培试验,研究桉树叶水浸提液对香根草根系生长及叶片部分生理指标的影响.结果表明:桉树叶水浸提液对香根草根系伸长和干重呈现出先促进后抑制的作用,但与对照相比差异不显著；香根草根系活力、叶绿素含量受桉树化感效应非常敏感,均随浓度的升高而呈现出先明显增加后显著下降的趋势；各浓度处理的香根草植株内丙二醛含量均高于对照,处理浓度≤40％时,差异不显著；高浓度≥60％,差异极显著.研究结果表明,香根草对桉树化感物质有较强的抗逆性,浓度≤40％桉树叶水浸提液促进了香根草的生长,仅在浓度≥60％时才表现为抑制作用.香根草有作为发展桉树人工林林下经济栽培植物的应用价值.%Agro-forestry management is one of the models of developing forest-under-economy. In order to study whether Vetiveria zizanioides was chosen as the economical plant in Eucalyptus plantation, effects of water extract of Eucalyptus leaves on Vetiver root growth and some physiological indices were studied with soil culture method. The results showed that: The root elongation and dry weight of Vetiveria zizanioides were first increased and then decreased, but they were not evident compared with the control. The root activity and chlorophyll content were sensitive to the allelopathy of Eucalyptus, and was first obviously increased and then significantly decreased with the increase of the concentration. The MDA content of Vetiver in different treatments was higher than that in control, and it was no obvious difference in low concentration(under equal or lower concentration of 40%). But it was obvious difference in high concentration (the treatment concentration was equal to or above 60%) . Results indicated that Vetiveria zizanioides had more strong viability to the effect of allelochemicals of Eucalyptus and had application foreground of developing agro-forestry management Eucalyptus plantation.
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