作　　者： ; ;

机构地区： 广州城市职业学院

出　　处： 《中国农学通报》 2011年第28期192-195,共4页

摘　　要： 为研究红花酢浆草叶片和叶柄水提取液对3种草花种子萌发的影响,探明外来物种入侵的机制,以红花酢浆草叶片和叶柄的不同浓度水提取液为材料,研究不同浓度(0.625%、1.25%、2.5%)的水提取液浸种对金盏菊、羽状鸡冠花、孔雀草种子萌发的影响。结果表明:不同草花种子对红花酢浆草水提取液的敏感程度不同。0.625%的红花酢浆草水提取液对金盏菊种子萌发具有促进作用,1.25%、2.5%的水提取液对其具有抑制作用。0.625%、1.25%和2.5%的红花酢浆草水提取液对孔雀草、羽状鸡冠花种子的萌发均起到一定的抑制作用,抑制作用的浓度梯度效应不明显。表明红花酢浆草叶提取液对金盏菊种子萌发具有较强的化感作用,对孔雀草和羽状鸡冠花种子萌发的化感作用较弱。 In order to study the allelopathy effect on seed germination and seedling growth of the aqueous extracts from leaves and leafstalks of Oxalis corymbosa,probing the invasive mechanism of alien species,the aqueous extracts of O.corymbosa were used as the test material in this paper.Its purpose was to study the influence of the aqueous extracts of O.corymbosa to Tagetes patula,Calendula officinalis and Celosia cristata three herbaceous flowers seed germination and seedling growth.The concentration of the aqueous extracts from leaves and leafstalks of O.corymbosa was 0（CK）,0.625%,1.25%,2.5%.The results showed that sensitivity to the aqueous leaf extract of O.corymbosa differed among the three species.Concentration at 0.625% of the O.corymbosa aqueous extracts from leaves and leafstalks promoted the germination and seedling growth of Tagetes patula,however,concentration at 1.25%,2.5% inhibited the germination and seedling growth of Tagetes patula.Concentration at 0.625%,1.25%,2.5% of the O.corymbosa aqueous extracts from leaves and leafstalks inhibited the germination and seedling growth of Calendula officinalis and Celosia cristata,but the inhibition of concentration gradient was not remarkable.The test showed the allelopathy of O.corymbosa to Tagetes patula was stronger,the allelopathy to Calendula officinalis and Celosia cristata was weaker.

关 键 词： 红花酢浆草 化感作用 金盏菊 羽状鸡冠花 孔雀草 发芽率 发芽速度系数

领　　域： [农业科学] [农业科学]