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天然红松坚果优树选择方法的研究 总被引:1,自引:0,他引:1
天然红松坚果优树选择方法的研究徐兰俊(黑龙江省林科院丽林林场)肖杰(牡丹江林管局)张海廷(黑龙江省林科所)红松既是东北地区珍贵用材树种,又是优良的木本油料植物。其球果、松脂、花粉等不仅用途广泛,而且具有较高的经济价值,是发展、培育经济林的主要树种之一... 相似文献
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红松人工林坚果型优树标准的研究 总被引:3,自引:0,他引:3
研究提出了红松人工林选择初选优树方法和标准。应用多元回归和改良加权系数公式计算选择指数,依选择指数最高者为初选优树,提出红松坚果优树划分为早熟型和晚熟型,通过定向培育,选出优良坚果类型。 相似文献
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红松开花结实习性与球果优树选择方法的研究 总被引:3,自引:0,他引:3
通过杈干与分杈、红松开花结实连续性、授粉与结果枝间比例关系的研究,提出了生理性杈干早、果位中上位、果位排列与果枝近3a基径比例等红松球果优状选择标准。 相似文献
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本文以红松自然分布内3个亚区、9个地点、108株优树自由授粉家系测定表明,亚区间和家系/地点/亚区间差异显著、极显著,变异是分层次的。从选择效果上看,总体选择大于亚区内选择,108个家系超过对照78个,占参试总数的72.2%;超过对照20%以上的有34个,超过对照40%以上的有8个。 相似文献
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红松无性系果林建立的人工林优树选择方法 总被引:1,自引:1,他引:0
建立红松无性系果林,选择优树是关键。根据2011年丰年年结实量和结实厚度与4a总结实量相关显著性,制定以当年结实量和结实厚度为标准的选优方法。单株当年结实数量指标:平均值加上一倍标准差;单株当年结实厚度数量指标:平均值加上一倍标准差。 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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Liu HuirongNortheast Forestry University 《林业研究》1993,4(2):11-17
The plantations of korean pine(Pinus koraensis)and scots pine(Pinus sylvesrisvar.mongolica)are mainly pure stands.Fires are gradually causing problems in theseplantations and being paid much more attention recently.Study on the influence of fire ontrees and the adaptation to fire,therefore,is of great important to probe the fire ecologicalproperties and the protection ways of these two species.The results are as follows:Bothof the species are easily damaged by fire,but korean pine is more susceptible.In the samefire,korean pine is damaged more seriously than scots pine although they have the samesize.Young individuals have low fire resistant capacity and can be damaged seriously,andolder ones have strong fire resistance and can be damaged lightly.Up-hill fire makes aserious damage to the trees distributed in up-slopes with the reason of higher fireintensity.Down-hill fire makes a serious damage to the trees distributed in down-slopcswith the reason of higher fire severity.The larger deocambium area in t 相似文献
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阔叶红松林倒木贮量动态研究 总被引:4,自引:2,他引:4
本文研究了中国吉林省长白山区阔叶红松林倒木贮量的动态变化规律。阔叶红松林倒木贮量包括其现有倒木及其年输入量等贮量的变化规律。阔叶红松林现有倒木贮量开始为16.25 t·hm-2,以后随时间减少,到100年分解掉其干重的85%左右,300年后所剩无几。倒木年输入量平均约为0.6 t·hm-2,其贮量是随时间而增加,200年后稳定在31 t·hm-2,可保持到该群落的顶级时期。倒木总贮量的变化在初期呈增加趋势,而后随着现有倒木的完全分解,倒木贮量就与其倒木的年输入趋于一致,最后稳定在上述水平上。图4表2参9。 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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Dynamics of nitrogen nutrition of coexisting dominant trees in mixed broad-leaved/Korean pine forest 总被引:1,自引:0,他引:1
IntroductionThecapacityofwoodyplantstoassimilateavail-ablenitrogen(nitrateandammonium)hasbeenweIlstudied,especiaIIyintermsofhabitatandspe-cies-reIateddifferencesinnitrateandammoniumassimiIationcapacity(Addoms1937lHauck1968lAlGharbietaI.1984,L8eetaI.1978,Tamm,1991,Vi-touseketaI.,1982iLietaI1994a,1994b,1995)However,nostudyhasfocusedonspecies-specifictemporalvariationinnitrateandammoniumassimiIa-tionamongexplicitIyco-existingwoodyplants,eventhoughtemporaIdifferentiationintheuseofnitratean… 相似文献
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AgcncrationrcfcrstoaIltrccsgencratcdinsamcPCriodoftimc.Tl1isisat`idcl}'ac-ccptedcol1ccpt.a11dtl1c111ostimPOrtantcharac-tcristicofgcncrationisgcncrationintcri'aloflime.TlcbiologicalcontcntisrcIati\'c1}'t'agucwhcnidcntif3'agcncrationonIyb}'mcansoftime.ltisPoi11tcdoutb}By31,lHlI(l985)tl1atagcncrationrcfcrstoalltl1ctrccst`11ichhax'csamcorigination,agc.morPho1og}',ccologica1proPCrt3'andPOsitionincom111unity,sotl1crcarcman}'`"a},stoidcntif3'gcncration.ltisjustbccauscofthcabundanccoftl1cconnota… 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