百合根系分泌物对4种观赏植物的化感作用

Allelopathy of lily root exudates on some receiver ornamental plants

【目的】研究波利安娜和白狐2个百合品种(供体)根系分泌物对莴苣、金鱼草、千日红和满天星(受体)的化感作用,为百合的产业化生产选择后茬作物提供理论论据。【方法】采用滤纸收集根系分泌物的方法,研究百合根系分泌物对受体植物种子发芽、幼苗生长及幼苗根重的影响。【结果】波利安娜百合根系分泌物对莴苣和满天星的根长和侧根数的抑制作用均达到显著水平(这可能是根系与化感物质直接接触所致),但对这2种受体植物其他指标的抑制作用均未达显著水平;对金鱼草的化感抑制作用除发芽率和根鲜重未达显著水平外,其他指标均达显著水平;对千日红的化感抑制作用除根鲜重外,其余指标均达显著水平;白狐百合根系分泌物对4种受体植物的化感作用,总体上表现为抑制作用大于促进作用。【结论】莴苣和满天星可作为波利安娜百合的后茬作物;白狐百合后茬不宜种植这4种受体植物。

[Objeetive] The allelopathy effects of supplier plant lily（Lilium brownii）root exudates of two varieties Pollyanna and White fox on four receiver plants lettuce（Lactuca sativa）, snapdragon（Antir- rhinum majus）, gomphrena （Gom phrena globosa） and starriness（Gypsophila elegans） were studied. [Method] The root exudates were collected by the method using filter paper. Allelopathy of lily root exudates was studied by measuring the seed germination and seedling growth of four reeeiver plants. [Result] The root length and the number of lateral root of lettuce and starriness were significantly inhibited by the root exudates of lily cv. Pollyanna, and the other targets were not significantly inhibited. The germination rate and root fresh mass of snapdragon were not significantly inhibited by the root exudates of lily cv. Pollyan- na,and the other targets were significantly inhibited. The gomphrena were significantly inhibited by the root exudates of lily cv. pollyanna excepting the root fresh mass. The root exudates of White fox on four receiver plants showed greater inhibition than the promoter action. [Conclusion] Lettuee and starriness were the tolerant latter crops of Pollyanna. The four receiver plants were not suitable as the latter crops of White fox.