6种杂草对紫花苜蓿的化感作用

A Study of Allelopathy on Alfalfa with Six Variety of Weeds

以6种杂草水提液、醇提液对两种紫花苜蓿Medicago sativa品种种子萌发及幼苗生长的影响进行了研究.结果显示:播娘蒿Descuminia sophia(L.)webb.Ex Prantl、飞廉CarduusnutansLinn、离子草Chorisporatenella(Pall.)DC.、荠菜Capsella bursa-pastoris、附地菜Trigonotis peduncularis(Trev.)Benth.和冷蒿Artemis-ia frigida Willd.Sp.Pl.对紫花苜蓿均表现出不同程度的化感作用.飞廉和离子草的水提液显著降低了陇东苜蓿Longdong sativa和阿尔冈金Algonquin幼苗苗长、干质量以及种子的萌发率,播娘蒿的醇提液显著降低了阿尔冈金幼苗苗长、干物质以及种子的萌发率.阿尔冈金品种受杂草的化感作用的影响大于陇东苜蓿品种.

This is a study of two alfalfa（Medicago sativa） seeds on seed germination and shoots growing by using water and ethanol extract from six kinds of weeds.The results show that Descuminia Sophia,Ex Prantl,Carduusnutans Linn,Chorispora tenella DC,Capsella bursa-pastoris,Trigonotis peduncularis,and Artemisia frigida Willd.Sp.Pl.all have different degrees of allelopathic effects on alfalfa.Water extracts from CarduusnutansLinn and Chorispora tenella（Pall.） DC,could significantly reduce stem lenghth,dry weight and seed germination rate of Longdong alfalfa and AErGangJin alfalfa.Allelopathy of weeds on AErGangJin alfalfa is greater than that on Longdong alfalfa.