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本文报道了我国西北地区宽织蛾亚科1新种和4中国新记录种。模式标本保存在西北林学院。1.青海矩织蛾Exaeretiaqinghaiana,新种(图1,2)翅展17.0~19.0mm。正模,配模♀,青海省西宁市,2280mm,1995—Ⅶ—20,李后魂、王淑霞采;副模1,2♀♀,青海省湟源县,1995—Ⅷ—16~22,朱兰芳采。本种同ExaeretiaaliselaStainton相似,但前者雄性外生殖器抱器背中央有一细长内突,雌性外生殖器囊突较短,不达交配囊底部。2.多广织蛾Agonopterixmultiplicela(Erschof,1877),中国新记录DepresariamultiplicelaErschof,1877,HoraeSoc.Ent.Ros.,12:344.Agonopterixmultiplicela(Erschof,1877),Lvovsky,1977,Systemfaun.insects:72.分布:中国(陕西),俄罗斯,立陶宛,丹麦,日本,罗马尼亚。3.毒芹广织蛾Agonopterixalstromeriana(Clerck,1759),中国新记录Phalaenaalstrom 相似文献
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大造桥虫对火炬树的危害及其发生特点 总被引:2,自引:0,他引:2
火炬树RhustghinaLinn.原产北美,以其适宜地域广、成林速度快、净化空气作用强、秋后红叶观赏价值高,而成为我地区荒山荒滩主要绿化树种和城乡主要美化树种。1994年9月发现,大造桥虫在我区100hm2、5年生火炬树上大发生。虫株率100%,平均虫口密度0.6头/复叶,单叶几乎全被食光,使火炬树失去净化、绿化、美化作用。大造桥虫AscotisSelenaria(Deniset Schiffermuller)属鳞翅目尺蛾科,国内南方省份多有该虫的分布,而在北方火炬树上大发生成为火炬树的主要害… 相似文献
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生物固氮─—生态农业的一个重要启动因素陈士平(辽宁省农业科学院土壤肥料研究所,沈阳110161)BiologicalNitrogenFixation—AnImportantRunningFactorofEcologicalAgriculture¥.ChenShiping(SoilandFertilizerInstilute,LiaoningAcademyofAgriculturalSciences,Shenyang110161).ChineseJournalofEcology,1993,12(2):31—33.LeguminousgreenmanurecropssuchassweetcloverandAstragalushuangheensis,canprovidedefiniteamountofbiologicallyfixed-NtomakeN-budgetbalance,promotesoilphysicalandchemicalproper-ties,reducesoilandwatererosion,andthus,increaseperunitareayieldandtotaloutputwhe 相似文献
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Inquiescentmalecicadas,theauditorysensitivitiesaresimilartothoseofcicadafemales[1—3].Butinsingingmalecicadas,theauditorymembrane(tympanum)producesintensivevibrations,andisamainwindowofsoundradiation[4—8].Therefore,inthetraditionalideas,thehearingsystemofsing… 相似文献
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《人类学学报》2002,(Z1)
1 IntroductionZhoukoudianLocality 1 5wasfoundin 1 932andexcavatedin 1 935— 1 937.ItisoneoftherichestlocalitiesintheZhoukoudiancomplexandaveryimportantlateMiddlePleistocenearcheologicalsiteinNorthChinaandgreaterEastAsia .However,therichunearthedmaterials ,includingmorethan 1 0 0 0 0stoneartifactsandbonesofatleast 33mammalianspecies ,haveremainedinaccessibletoresearcherssincethe 1 94 0s ,andtwopartialreports[1— 2 ] publishedinthe 1 930shavebeentheonlyoriginalstudiesofthesiteforalongtime .In 1 997,theauthorcar... 相似文献
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Wheathaploidcanbeproducedbyembryorescueafterwheatandmaizecrosssincethemaizechromosomesarerapidlyeliminatedfromtheearlyzygoticembryos[1,2].Usually2%—5%ofwheatdoubledhaploidshowsagronomicvariations,butnoobviousmorphologicaltraitfrommaizeisobserved.Theywereco… 相似文献
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Amolecularmarkercanbedesignatedascodominantordominanttypeaccordingtothegenotypicinformationprovided[1—4].Foracodominantmarker,threebandpatternscanbeobservedinelectrophoreticgels,whichcorrespondtotwocopiesoftheDNAsegmentsonthislocusbeinghomozygousP1type,h… 相似文献
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TheCterminusofinsulinBchainplaysanimportantroleintheinteractionofinsulinwithitsreceptor[1—5].Inordertomanifestthespecificroleofthisregion,aseriesofanalogsmutatedorchemicallymodifiedattheCterminusofBchainhavebeenprepared,andtherelationshipbetweenthestruc… 相似文献
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持续农业是生态农业的继续与发展 总被引:10,自引:2,他引:8
持续农业是生态农业的继续与发展袁从,赵强基(江苏省农业科学院,南京210014)SustainableAgriculture—TheContinuationandDevelopmentofEcologicalAgriculture.¥YuanCongyi;ZhaoQiangji(JiangsuAcadenzyofAgriculturalSciences,Nanjing210014).ChineseJoumalofEcology,1993,12(2):13-15.Inlightoftheconditionofourcountry,thispaperintroducestheconceptsandcontentsofsustainablea-gricultureanditsquantitativeevaluationindices──sustainability,stability,equalityandharmonity(di-versity).Simplifiedsysteminput—outputequilibriumisusedtoestimatethedynamicsofsoilfertility.P 相似文献
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胶丝藻属Gloeotila由kutzing于1843年建立,在中国为首次报道,我国已知有3种:美丽胶丝藻G.caldaria,普罗胶丝藻G.protogenita和略缢胶丝藻G.subconstricta.标本自安徽黄山和芜湖。 相似文献
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Construction of a fusion protein between N-terminal 153 peptide of thrombopoietin and erythropoietin
Thrombopoietin(TPO)isahematopoieticcytokineclonedinrecentyears[1—3].Itsfunctionistoregulatetheformationofplatelet,whichplaysanimportantroleinbloodclotting,bystimulatingthestemcellstodifferentiateanddevelopintomaturemegakaryocytes.Theresultsofanimalexperim… 相似文献
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HomopyrimidineoligonucleotidescanbindtothemajorgrooveofduplexDNAathomopurinehomopyrimidinesequences,formingalocaltriplehelix[1—3].TherearesomekindsoftriplexDNA,unimolecularorbimolecularortermoleculartriplexwhichconsistsofoneortwoorthreestrandsofDNA,respe… 相似文献
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《人类学学报》2002,(Z1)
Dentaldevelopmentanderuptionsequencesareconsideredimportantindicatorsoflifehistorypat terns,andtheirstudycanshedlightontheevolutionoflifehistoryinhumansandotherprimates[1] .ThispaperaimstoestablishthedentaleruptionsequencesofLufengpithecuslufengensisandtocomparethemwiththoseofotherhominoids .1 MaterialsandmethodFivejuvenilemandiblesofLufengpithecuslufengensisfromthecollectionsoftheInstituteofVerte bratePaleontologyandPaleoanthrolpogy (IVPP)—PA6 6 3,PA86 8,PA82 2 ,PA82 3andPA6 73—wereexamined .Necessaryradio... 相似文献
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Thegeneticbasisofheterosisisstilladebatingissue.Twohypotheses,thedominancehypothesisandtheoverdominancehypothesis,bothproposedin1908[1—3],havecompetedformostpartofthiscentury.Althoughmanyresearcherspreferonehypothesistotheother,experimentaldataallowingforcr… 相似文献
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从广西荔蒲河所产的美丽小条鳅Micronoemacheiluspulcher(NicholsetPope)鳃上采得单殖吸虫一种,经鉴定为锚首虫属一新种──小脊锚首虫,Ancyrocephaluslirellatussp.nov。新种与A.botiae.Maetal.1981后吸器几了质结构相似,但雄性交接器,阴道结构显著不同。 相似文献
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农家庭院沼气渣肥中N-NH_4 ̄+的挥发损失及其防止途径的研究卢明远,郭秀银,梁文举(中国科学院沈阳应用生态研究所,110015)VolatilizationLossofNH-NfromMethane-generatingManureinRuralHouseholdsandItsPreven-tionmeasures¥LuMingyuan;GuoXiuyin;LiangWenju(InstituteofAppliedEcology,AcademiaSinica,Shenyang110015).ChineseJournalofEcology,1993,12(2):41-42.ThispaperreportsthevolatilizationlossofNH-Nfrommethane—generatingmanureinruralhouse-holdsandsuggestssomeeasilyaccessiblemeasuresforreducingthislossandpreventingatmosphericpol-lution.Keywords:methane—generatingmanure,NH—N 相似文献