Allelopathic Effects of Cedrus deodara Needle Extracts on Seed Germination and Early Growth of Three Turfgrasses  

作　　者：Menghong HU Xun LYU Man SUN Baoquan ZHANG Yuan LIU 

机构地区：[1]Gansu Xiaolongshan Forest Ecosystem National Positioning Observation and Research Station,Gansu Key Laboratory of Secondary Forest Cultivation,Gansu Xiaolongshan Forestry Research Institute,Tianshui 741022,China [2]College of forestry,Gansu Agricultural University,Lanzhou 730070,China

出　　处：《Agricultural Biotechnology》2022年第1期22-27,31,共7页农业生物技术（英文版）

基　　金：Supported by Gansu Provincial Forestry and Grassland Bureau Science and Technology Project(2019KJ089);Tianshui Science and Technology Program Support Project(2020NCK2106)。

摘　　要：[Objectives]This study was conducted to provide reference for plant landscaping,optimization of planting structure and rational allocation of species in Cedrus deodara gardens.[Methods]With three common garden plants in northern China,Trifolium repens L.,Poa pratensis L.and Trifolium pratense L.,as receptors,the effects of four concentrations(0.025,0.05,0.075 and 0.10 g/ml)of C.deodara needle extract on seed germination and early seedling growth of the three turfgrasses were studied by the Petri dish filter paper method,using a clear water treatment(0 g/ml)as control check(CK).Data were subjected to analysis of variance(ANOVA)and multiple comparisons(Duncan)using SPSS16.0.[Results]Different concentrations of C.deodara needle extract had significant inhibitory effects on seed germination,radicle and seedling height growth of T.repens,T.pratense and P.pratensis(P<0.05),and the inhibitory effects increased with the increase of concentration.When the concentration reached 0.075 g/ml,seed germination and seedling growth of T.repens stopped,and radicle and seedling growth of T.pratense and P.pratensis also stopped.When the concentration was equal to 0.10 g/ml,germination of T.pratense and P.pratensis seeds was inhibited,and the absolute values of allelopathic index was the largest,that is,the inhibitory effects were the largest.And with the increase of concentration,the absolute value of synthetical allelopathic index also increased.The extract of C.deodara needles contained main allelochemicals leading to the scarcity of understory vegetation.[Conclusions]This study provides a theoretical basis for reasonable garden plant configuration during C.deodara greening and garden landscaping.

关 键 词：Cedrus deodara L. Needle extract Seed germination Early seedling growth Allelopathic effect 

分 类 号：S688.4[农业科学—观赏园艺]