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作者对沙珠玉地区落叶松球蚜用 2 0 %、2 5 %吡虫啉、2 .5 %溴氰菊酯和 5 0 %氧化乐果进行了防治试验 ,结果表明 ,吡虫啉对落叶松球蚜具有优良的防治效果。 2 0 %和 2 5 %吡虫啉 1 2 5 0倍液防效率最佳 ,达 90 %以上。 2 .5 %溴氰菊酯和 5 0 %氧化乐果的防治效果不理想。 相似文献
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落叶松球蚜生物学特性及防治试验研究 总被引:2,自引:0,他引:2
通过对落叶松球蚜发生为害及生物学特性的研究,得出该虫在小陇山林区以青海云杉和落叶松为寄主,两年完成生活周期。其中,以侨蚜在落叶松上一年5代循环危害,5月上旬是第1代侨蚜的初孵若蚜盛期,是防治的关键时期。试用40%氧化乐果1500倍液、50%敌敌畏1500倍液喷雾,效果均在90%以上。 相似文献
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lNTRODUCTloNKorcanpincforcst'asaclimaxofcastlnounta1nsinNortheast-isalt"a}simportantobjcctforforcstcrstostlld}.AIthougllman}'cxpcrtsllax'cn1assi\'cI}'stlldicdthcdy'nal11icsproccssofKorcanpincforest.thcstudlesinsolllcaspcctsstilIIackdcpth'ct'cnl1at'cgaps.Sillccslnall-dianlcterKorcanpincsplayaIinL-lllgIbrlllerandlattcrroIcinKorcanpincforcstd}'llaIl1icsproccss.tl1cstudicsaboutsn1all-dlan1ctcrKorcal1pil1cs-origlnatiol1'gro\Y1l1cllaractcrandthcirrclatiol1stostandstnICt1Ircundoubtcd1}oflbr… 相似文献
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ThereisatractofsecondaryforestsinnatUfKoreanghn(Pinuskorniensis)forestndon-FenlinNatUrReserveswithanareaofl8l65.4hIn,locatedinthesouthslopeofXiaOking'anlingMountain.ThisresearchwascAnedoutonthesuccessionofhosstandNATURAL0unS0FwiSTANDSInl93l,therewasawildfireinthevir-ginKoreanPineforests,whichstretchedfromShanggedingalongTangwangffivertonorth-eastuntilstandNo.32OfFenglinNatureRe-serves.Thefiredareawasabout2,44Ohm2.TOdate,thestandsisbroadleavedmixedfOr-estsdOndnatedbywhitebirch(… 相似文献
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介绍了红松种子混雪埋藏育苗试验过程.从而得出结论,利用混雪埋藏技术育苗与用温水浸种催芽方法育苗相比,有许多优点,可使幼苗早出土、延长生长周期、增强苗木抗寒抗旱抗病虫能力. 相似文献
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STUDY ON KOREAN PINE FUEL TYPES 总被引:1,自引:0,他引:1
Koreanpine(Pnuskorabois)isoneofthemostimpohanttrdesPeCiesinnortheastChina,anddistributesnatUraIlyintheeastmountains(theXiaoxing'anMountainsandtheChangbaiMountains)ofthearea.Alongwiththedevelopmentofforestindusnyinthisarea,thevirgnforestSredueeraPidly,andtheplan-tationsofthesPeCiesincreaseyearly.KoreanpineplantationsaremuchmorecombustiblethanitSnaturalforestS(broad-leaVdsoreanpineforestS).FueltyPesIUdyinChinabeganinearlyl98o's.ThereisnosystematicstUdyonKoreanpinefueltyPesuptonow.Base… 相似文献
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论述了黑龙江省红松林主要害虫的种类、分类地位、危害部位以及危害程度,共包括5个目14科36种。其中,枝梢及球果害虫松梢象、冷杉梢斑螟、微红梢斑螟以及食叶害虫落叶松毛虫是黑龙江省红松林的最主要害虫。同时,还提出了黑龙江省红松林主要害虫的综合防治技术措施。 相似文献
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Energycirculatingbetweenliveandenvironmentsystemsformesanenergyflowofaecosystem.Itissignificanttocorrectlyrecognizethepatternofenergyflowinaecosystemfordeterminingthemeasurementofforestmanagement.Thepaperstudiedenergydistributionandtranslationpattern.whichcanprovideatheoreticalbasisforreasonablymanagingkoreanpineplantations.MethodofRescarchThestandinvestigatedisapurekoreanpineplant-ationthatwasplantedinl96l,withspacingofl.Oxl'5m;itwasthinnedfor4timesafterreachingclosureandnowhasadansityofl52… 相似文献
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通过对黑龙江省森工林区五营林业局红松林三种更新方式的对比分析,指出该林区红松林分的最佳经营方式为人工更新造林。 相似文献
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1NTRODUCT1oNMaoerMountainliesintheeasternpartofnortheastChinamountainareawithinthenaturalgeographicaldistributionrangeofavaluabletimberspeciesofKoreanpine(PinusKoraiensis).Foraboatmorethanlooyears,cuttinganddestroyingcontinued;f9wnaturalprimaryKoreanpineforestsleft.AlargeareaofKoreanpineplantations,nevertheless,has'grownupastimegoing.Itisapressingproblemforushowtocultivatethemwell,andtorecoveranddevelopthemraPidlyinourforestproductionandscientificresearch.FortheKoreanpinetree,peopledid… 相似文献
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INTRoDUCTIoNThcdcscribingintcrsPCcificandintrasPCi-ficcompeitivcintcnsity'oftrccsPCcicsisal-``aysshortoftl1cdcsirablcquantitati\'cindiccsintraditionalPOpulationccqog}.Toprcdictgrott1hofindit-idualtrcccxactI}',sOI11crc-searchcrhateadt'anccd111a11}'quantitatit'cindiccsintcrPrcti11gcol11PCtiti\.cintcl1sit}'bc-twccnindividualtrccssincctI1cl96()'s.Tl1cscquantitatit'cindcxs}'stc111s.callcdasco111PCti-tionindcxs}'stc111salso'I1asbcc11considcrcdasanapproachtostal1dgro`vtl1prcdictionb)'grot'… 相似文献