芦苇浸提物对喜旱莲子草生长影响的研究

In this paper, we investigated the effects of ethanol extracts of Phragmites australis on the growth of Alternanthera philoxeroides, which would be helpful to control A. philoxeroides. The results showed that: 1) The ethanol extract of P. australis had allelopathic inhibition on A. philoxeroides (Synthetical response index of allelopathy＜0), with that from stem of P. Australs showing strongest allelopathic effect on A. philoxeroides. 2) The ethanol extract of P. Australs decreased the bud number of ramets, root-top ratio and chlorophyll content, but increased the node number, plant height, leaf area, succulent degree and relative electric conductivity of A. philoxeroides. 3) The concentration of the ethanol extract of P. australis had little effect on the indexes of A. philoxeroides.