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时间:2019-08-06
《三七连作土壤对三七、莴苣的化感作用》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、每北雇擘搪2009,18(1):139—142ActaAgriculturaeBoreali—occidentalisSinica七连作土壤对三七、莴苣的化感作用三游佩进,王文全,张媛,张红瑞,庞玉新,崔秀明。(1.北京中医药大学中药学院,北京100102;2.云南省文山州三七科学技术研究所,云南文山663000)摘要:探讨三七连作土壤的化感作用,初步揭示三七连作土壤化感作用的机制。采用不同质量浓度三七连作土壤水提液对三七、莴苣种子萌发及幼苗生长进行生物测定。结果表明,三七连作土壤水提液对三七、莴苣的发芽率、发芽指数、根长、苗高、鲜质量、硝酸还原酶活性均有
2、不同的化感作用。随着三七连作土壤水提液质量浓度的不断提高,连作土壤对三七苗高、鲜质量的抑制作用也在明显增加;三七连作土壤水提液对莴苣根长的作用呈低促高抑的双重效应,:同质量浓度的土壤水提液对莴苣的硝酸还原酶活性均呈显著的抑制作用。三七连作土壤水提液中存在着化感物质影响三七和莴苣种子及幼苗的正常生长,其化感作用与土壤中化感物质浓度密切相关。关键词:三七;连作土壤;化感作用;硝酸还原酶活性中图分类号:S154.1文献标识码:A文章编号:1004—1389(2009)01-0139—04AllelopathicEffectsofContinuousCroppin
3、gSoilofPanaxnotoginsengonNotoginsengandLettuceYOUPeijin,WANGWenquan,ZHANGYuan,ZHANGHongrui,PANGYuxinandCUIXiuming(1.CollegeofChinesePlharmacy,BeijingUniversityofChineseMedicine,Beijing100102,China;2.WenshanPrefectureSanqiScienceandTechnologyResearchInstitute,WenshanYunnan663000,Ch
4、ina)Abstract:TheallelopathiceffectofcontinuouscroppingsoilofPanaxnotoginsengwasinvestigatedanditsmechanismwasrevealedinitially.ThebioactivitiesofcontinuouscroppingsoilofPanaxnotog—insengwereevaluatedonseedsgerminationandseedlingsgrowthofPseudo—ginsengandlettuce.Theallelopathiceffe
5、ctofcontinuouscroppingsoilofPanaxPseudo—ginsengongerminationrate,germina—tionindex,rootlength,seedlingheight,freshweightandNRactivityofPseudo—ginsengandlettucewasdifferent.AstheconcentrationoftheextractsfromPseudo—ginsengcontinuouscroppingsoilin—creased,thesuppressiononseedlinghei
6、ghtandfreshweightofPseudo—ginsengincreased;thereweredualeffectsonrootlengthoflettuce.ThesuppressionofdifferentconcentrationonNRactivityofLettucewassignificant.ThereVv,eresomesubstanceswhichhadsomeinfluenceonthenormalgrowthofPseudo—ginsengandlettuceinaquaticextractfromPseudo—ginsen
7、gcontinuouscroppingsoilandthecloserelationshipexistedbetweenallelopathyandcontentionofallelochemieals.Keywords:Panaxnotoginseng;Continuouscroppingsoil;Allelopathic;NRactivity三七为五加科(Araliaceae)植物三七(Pa—na,TcnotoginsengF.H.Chen)的干燥根。著名珍收稿日期:2008—08—28修回日期:2008—09—10基金项目:国家“十一五”攻关项目(2
8、006BA109B03)。作者简介:游佩进(1983一),男,在读
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