黄花蒿对4种受体植物的化感作用研究

采用室内生物测定法,以小麦、燕麦、黄瓜和萝卜为受体,研究了黄花蒿对受体植物的化感作用,结果显示:黄花蒿水浸提液对小麦、燕麦的化感综合效应(SE)为56.29、57.17;其地上部淋溶物对小麦和黄瓜表现为抑制作用,对燕麦和萝卜表现为促进作用;其茎叶挥发物对4种受体植物根长生长有较强的抑制作用;其残体分解物前10d对受体有很强的抑制作用,根系分泌物对小麦和燕麦抑制作用较强,对萝卜和黄瓜表现为促进作用。结果表明,黄花蒿5种不同途径来源的化感物质对4种受体植物都有不同程度的化感作用,且黄花蒿主要是通过地上部淋溶、挥发向环境中释放化感物质,其次是通过根系分泌物对授体植物产生化感作用。

Allelopathy of Artemisia annua on 4 Receptor Plants

Regarding Artemisia annua L.as donor plant and wheat,oats,cucumber and radish as receptor plants allelopathy actions of A.annua were studied,by adopting indoor bioassay.The results showed that five allelochemicals of A.annua had different degrees of allelopathy to four receptor plants.The inhibition synthesis effect(SE) of aqueous extract of A.annua were 56.29 and 57.17 to wheat and oats.The eluviated matter inhibited wheat and cucumber growth.However,the eluviated matter had positive effects on oats and radish.The volatile matter of the aerial part of A.annua had evident inhibitive effects on roots length of four receptor plants.The residues in recent 10 days had the evident inhibitive effects on receptor plants.The root exudates had strongly inhibition on wheat and oats,but it had positive effects on cucumber and radish.In comparison to SE of five different allelochemicals,we suggested that A.annua mainly release eluviated matter,volatile matter and root exudates to the environment.