大花金鸡菊水浸液对6种常见园林植物种子萌发的化感作用  

Allelopathic effects from aqueous extracts of exotic Coreopsis grandiflora on seed germination of six native ornamental plant species

作　　者：杜明利[1] 高岩[2,3] 张汝民[2,3] 高群英[1] 傅杭飞[2] 

机构地区：[1]浙江农林大学园林学院,浙江临安311300 [2]浙江农林大学林业与生物技术学院,浙江临安311300 [3]浙江农林大学浙江省林学基础实验教学示范中心,浙江临安311300

出　　处：《浙江农林大学学报》2011年第1期109-114,共6页Journal of Zhejiang A&F University

基　　金：国家自然科学基金资助项目(30760193);浙江农林大学科研发展基金资助项目(2010FR057)

摘　　要：为探讨外来种大花金鸡菊Coreopsis grandiflora对本地植物的化感作用,采用生物测定方法研究了大花金鸡菊叶及根水浸液对狗牙根Cynodon dactylon,翦股颖Agrostis spp.,结缕草Zoysia japonica,二月兰Orychophragmusviolaceus,石竹Dianthus chinensis和鸡冠花Celosia cristata等6种植物种子萌发的影响。结果表明:随着大花金鸡菊叶浸液质量浓度的增加,受试植物种子发芽率逐渐降低,质量浓度为50.0 g.L-1时抑制作用达到最大,其中对狗牙根、翦股颖、结缕草和二月兰有极显著的抑制作用(P<0.01),抑制率分别为39.33%,56.0%,53.33%和46.22%。大花金鸡菊水浸液对发芽指数的影响大于对发芽率的影响。受试植物种子总化感效应大小依次为结缕草>翦股颖和二月兰>狗牙根>石竹>鸡冠花。综合分析表明,化感作用在外来种大花金鸡菊与本地植物生存竞争中起重要作用。In order to make clear the allelopathic effects of the exotic Coreopsis grandiflora on the native plant species,we studied the effects from aqueous leaf and root extracts of C.grandiflora on the seed germination of Cynodon dactylon,Agrostis spp.,Zoysia japonica,Orychophragmus violaceus,Dianthus chinensis,and Celosia cristata using the bioassay.Results showed that the aquatic leaf extract of C.grandiflora had significant allelopathic effects on seed germination of the six plant species,with the effects varying with the concentration of the extract.Foliar extracts at a concentration of 50.0 g·L-1 were found to be inhibitory（P0.01） to seed germination for C.dactylon,Agrostis spp.,Z.japonica and O.violaceus,with inhibition rates of 39.33%,56.0%,53.33%,and 46.22%,respectively,compared with the control.In addition,the seed germination index was more sensitive to extract application than the germination percent,with allelopathic sensitivity in the order of Z.japonicaAgrostis spp.and O.violaceusC.dactylonD.chinensisC.cristata.Results suggested that for the exotic C.grandiflora allelopathy may play an important role when competing with native plants.[Ch,2 fig.2 tab.25 ref.]

关 键 词：植物学 大花金鸡菊 园林植物 水浸提液 种子萌发 化感作用 

分 类 号：S718.3[农业科学—林学]