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1.
凤尾鸡冠的营养成分   总被引:1,自引:0,他引:1  
凤尾鸡冠(CelosiacristataL.cv.Plumosa)的营养成分分析表明:干品中花序、茎叶及种子的蛋白质含量分别为19.40%,24.60%及27.04%;氨基酸种类齐全;VB_1、VB_2、VC、VE和β-胡萝卜素等多种维生素含量较高;膳食纤维和无机元素含量丰富;种子脂肪含量为10.10%。说明风尾鸡冠富含多种营养成分,是一种值得开发利用的食物资源。  相似文献   

2.
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   

3.
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  
王先炜  侯传祥 《昆虫知识》1999,36(3):146-148
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   

4.
林那果CarissacarandasSyn.C.congesta又称刺黄果、假虎刺。为夹竹桃科常绿灌木,高可达3—5m;全株含白色乳汁;分枝低、弯曲、下垂;叶腋着生一对通常有分叉的锐刺。单叶对生,卵形至近圆形,革质;叶面深绿,具光泽。聚状花序顶生或腋生,通常有花3—5朵。花白色或浅粉红色,微香。浆果长椭圆形或圆球形,长15—25cm,宽1—2cm,成熟时深红色或暗紫红色。种子2—8枚,扁平、暗褐色。我园于1981年引入,现生长发育良好。据扩繁栽培观察,简介如下:1起源和生态适应性林那…  相似文献   

5.
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   

6.
锦香草     
锦香草Phyllagathiscavaleriei,属野牡丹科,多年生草本植物。叶片椭圆形、卵形至圆形,而且长有3—4毫米长的毛,毛茸茸的酷似熊掌,所以又名熊巴掌。它虽然全身长有许多毛,但能开出美丽紫红色的花来。花序伞形,整个花序像一只绣球,微风吹拂,千百只绣球在绿色地毯中滚动,颇具特色。锦香草植株矮小,高仅10—15厘米,贴地而生,常成片生长于海拔500—700米稀疏林下或林缘阴湿处。广西、广东、福建、江西、湖南有分布。宜在草坪中作缀花应用;开花时使草坪景观更加美丽。锦香草  相似文献   

7.
Inquiescentmalecicadas,theauditorysensitivitiesaresimilartothoseofcicadafemales[1—3].Butinsingingmalecicadas,theauditorymembrane(tympanum)producesintensivevibrations,andisamainwindowofsoundradiation[4—8].Therefore,inthetraditionalideas,thehearingsystemofsing…  相似文献   

8.
南方红豆杉(Taxuschinensisvar.mairei)又称美丽红豆杉,是红豆杉科的常绿乔木。高约达16米,树冠广卵形。树皮红褐色呈条状剥落。条形叶近镰状,叶背沿凸起的中脉两侧有两条黄绿色的气孔带。雌雄异株,雄球花集成头状,雌球花具短梗,3—4月开花。种子11月成熟。南方红豆杉是我国特有树种。产于长江流域及其以南各省区,陕西、河南、甘肃等地的南部亦有,野生于海拔1000—1500米的山谷溪边或山地半荫处林下。南方红豆杉树姿古朴端庄,叶色苍翠,秋季成熟的种子包于红色的假种皮中,散布在深绿色的…  相似文献   

9.
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   

10.
Wheathaploidcanbeproducedbyembryorescueafterwheatandmaizecrosssincethemaizechromosomesarerapidlyeliminatedfromtheearlyzygoticembryos[1,2].Usually2%—5%ofwheatdoubledhaploidshowsagronomicvariations,butnoobviousmorphologicaltraitfrommaizeisobserved.Theywereco…  相似文献   

11.
Amolecularmarkercanbedesignatedascodominantordominanttypeaccordingtothegenotypicinformationprovided[1—4].Foracodominantmarker,threebandpatternscanbeobservedinelectrophoreticgels,whichcorrespondtotwocopiesoftheDNAsegmentsonthislocusbeinghomozygousP1type,h…  相似文献   

12.
TheCterminusofinsulinBchainplaysanimportantroleintheinteractionofinsulinwithitsreceptor[1—5].Inordertomanifestthespecificroleofthisregion,aseriesofanalogsmutatedorchemicallymodifiedattheCterminusofBchainhavebeenprepared,andtherelationshipbetweenthestruc…  相似文献   

13.
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   

14.
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   

15.
Thrombopoietin(TPO)isahematopoieticcytokineclonedinrecentyears[1—3].Itsfunctionistoregulatetheformationofplatelet,whichplaysanimportantroleinbloodclotting,bystimulatingthestemcellstodifferentiateanddevelopintomaturemegakaryocytes.Theresultsofanimalexperim…  相似文献   

16.
HomopyrimidineoligonucleotidescanbindtothemajorgrooveofduplexDNAathomopurinehomopyrimidinesequences,formingalocaltriplehelix[1—3].TherearesomekindsoftriplexDNA,unimolecularorbimolecularortermoleculartriplexwhichconsistsofoneortwoorthreestrandsofDNA,respe…  相似文献   

17.
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   

18.
Epistasis plays an important role as genetic basis of heterosis in rice   总被引:6,自引:0,他引:6  
Thegeneticbasisofheterosisisstilladebatingissue.Twohypotheses,thedominancehypothesisandtheoverdominancehypothesis,bothproposedin1908[1—3],havecompetedformostpartofthiscentury.Althoughmanyresearcherspreferonehypothesistotheother,experimentaldataallowingforcr…  相似文献   

19.
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   

20.
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   

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