QUAN Guoming,JIN Chunlian,ZHANG Jiaen,et al.Allelopathic Effects of Two Invasive Plants Litter on Torenia fournieri[J].Northern Horticulture,2018,42(20):76-83.[doi:10.11937/bfyy.20180406]
两种入侵植物凋落物对夏堇的化感作用
- Title:
- Allelopathic Effects of Two Invasive Plants Litter on Torenia fournieri
- Keywords:
- bioinvasion; Praxelis clematidea; Bidens pilosa; litter; allelopathy
- 文献标志码:
- A
- 摘要:
- 以假臭草（Praxelis clematidea）、三叶鬼针草（Bidens pilosa）为试验材料，采用温室盆栽试验方法，研究了2种外来杂草凋落物分解对夏堇（Torenia fournieri）植株生长的影响，以探明其凋落物在入侵园林绿地土壤中的化感作用。每种杂草分别设置L10（10 g·盆-1）、L20（20 g·盆-1）和L40（40 g·盆-1）3个凋落物施用水平，以不添加凋落物为对照（CK）。结果表明：假臭草、三叶鬼针草的凋落物分解导致夏堇的株高、分枝能力、叶面积、生物量等性状指标大幅下降，尤其对分枝数量、叶面积和小花数量的抑制程度更高；并且随着凋落物量增加，其抑制作用更强，而假臭草的化感综合效应亦高于三叶鬼针草；夏堇的叶面积比、叶根比、比叶面积和平均相对生长速率显著降低，尤以假臭草的影响为甚，并且假臭草还能改变夏堇的生物量分配策略，根生物量比明显上升，茎生物量比则显著下降；与地下部根系相比，2种入侵杂草的凋落物分解对夏堇地上部茎、叶器官生长的化感效应更强，其生物量积累受抑制程度更高。
- Abstract:
- In order to explore allelopathic effects of Praxelis clematidea litter and Bidens pilosa litter in the invaded greenbelt soil,the effects of their litter decomposition on the growth of Torenia fournieri were examined by a greenhouse pot experiment.Three litter concentration levels of each weed were set as L10 (10 g·pot-1),L20 (20 g·pot-1) and L40 (40 g·pot-1),and no litter was added as control.The results showed that with the treatments of litter decomposition of the two exotic invasive weeds,the plant height,branching capacity,total leaf area and biomass of T.fournieri were declined dramatically,especially the inhibition effects on branch number,leaf area and flowerlet number.The allelopathic inhibition effects were generally enhanced with the increasing litter concentrations,and the allelopathic compound effect of P.clematidea was higher than that of B.pilosa.Leaf area ratio (LAR),leaf area to root mass ratio (LARM),specific leaf area (SLA) and relative growth rate (RGR) of T.fournieri were also significantly decreased,especially under P.clematidea litter treatments；moreover,the biomass allocation strategy of T.fournieri was changed by P.clematidea treatments,its root mass fraction (RMF) was increased obviously while its stem mass fraction (SMF) was decreased significantly.Compared with the underground root system,the allelopathic effects of litter decomposition of the two exotic invasive weeds on the growth of stem and leaf organs of T.fournieri were stronger,and the inhibition in their biomass accumulation was even higher.
相似文献/References:
[1]陶宏征,田学军,夏芳,等.三叶鬼针草水提液对蒲公英种子萌发和幼苗生长的化感作用[J].北方园艺,2015,39(10):87.[doi:10.11937/bfyy.201510021]
TAO Hong-zheng,TIAN Xue-jun,XIA Fang,et al.Allelopathic Effect of Bidens pilosa Extracts on Germination and Seedling Growth of Taraxacum mongolicum[J].Northern Horticulture,2015,39(20):87.[doi:10.11937/bfyy.201510021]
备注/Memo
第一作者简介：全国明（1975-），男，博士，副教授，现主要从事植物生态学与入侵生态学等研究工作。E-mail：gzbyqgm@126.com.责任作者：章家恩（1968-），男，博士，教授，博士生导师，现主要从事农业生态学与土壤生态学及入侵生态学等研究工作。E-mail：jeanzh@scau.edu.cn.基金项目：教育部博士点基金资助项目（20124404110009）；广东省科技计划资助项目（2015B090903077）；广东省高等学校高层次人才资助项目（粤财教(2013)246号）；广东省大学生科技创新培育专项资助项目（pdjha0839）；广州市属高校科研计划资助项目（2012A136）；广州市属高校“羊城学者”科研计划资助项目（1201561564）；广州市高校创新创业教育资助项目（2017252101）；广州市高校第九批教育教学改革资助项目（2017E03）。收稿日期：2018-03-21