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1.
Based on a vast of field investigation on stamps inTilia broad-leaved Korean pine forest on northern slope of Changbai Mountain, age structure of some major species were studied
in this paper. The results showed that Korean pine population was composed of grouped patches with different ages. There were
not strict intervals among the dominated generations, and the curve of age structure often had two or more peaks. The distribution
of broad-leaved species in natural Korean pine forest was grouped or scattered, and age distribution was also uneven-aged.
There existed close relation between quality of broad-leaved species and Korean pine. So, it shaped multi-storied and uneven-aged
mixed forest. The model of age structure and growth demonstrated their passive correlation, but growth became slow when woods
had reached old age.
The study was funded by the Opened Research Station of Changbai Mountain Forest Ecosystems, the Chinese Academy of Sciences.
(Reponsible Editor: Chai Rulhai) 相似文献
2.
长白山北坡椴树阔叶红松林群落主要树种的年龄结构研究 总被引：14，自引：0，他引：14
通过对长白山林区椴树阔叶红松林伐根的大量调查 ,认为红松种群是由不同年龄阶段的群团状斑块组成 ,以多世代群居 ,优势世代之间没有一定的严格间隔期 ,在年龄结构图上往往出现两个或两个以上高峰。阔叶树在天然红松林中的分布呈群团状或散生 ,阔叶树的年龄也为异龄性 ,也为多世代共居。红松与阔叶树之间存在明显的动态消长关系 ,同龄伴生 ,异龄混生 ,形成复层异龄的针阔混交林 ,年龄结构与年生长关系的数学模型表明年生长量与年龄有正相关趋势 ,但林木年龄达到老龄时 ,生长有所减缓 相似文献
3.
金沟岭林场阔叶红松林结构特征研究 总被引：1，自引：0，他引：1
对金沟岭林场阔叶红松过伐林直径结构、重要值、分布格局以及存活曲线进行了分析。结果表明:①林分直径结构呈反"J"型,表现出了异龄林的特征,经不同分布函数拟合结果显示,对数函数、逆函数、二次函数、三次函数、复合函数、幂函数、生长函数、指数函数、逻辑函数都符合直径分布规律,R2>0.922、显著性水平P≈0,其中逆函数和三次函数的R2达到了0.976和0.971;②主要树种中,红松的重要值最大,其次为椴树、色木和杂木,冷杉的重要值最小;③林分分布格局为聚集分布,经显著性检验差异显著;不同树种分布格局有所不同,红松、杂木和色木为聚集分布,经显著性检验差异极显著,其它树种为随机分布;④主要树种存活曲线经线性回归,红松和色木存在显著的相关关系,椴树、云杉、冷杉不存在线性相关关系。 相似文献
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5.
INTRoDUCTIoNBroad-lcavedKoreanpincforcstisthczonalclimaxecosystcminnortl1castmountainsofChina.Itisknot"nasdivcrscsPCCicsandsPCcialindicatorinthcnortl1cmtcmPCratcforcstty'PCsofthccarth.Bccauscthiski11dofforcstllashighproductivityandlargcasscss-ment,andiscomPoscdoflnany'\1aluabIccoIl1-mercialtI-eesPCcicssucl1asI,inuskoraicnsi3,Fraxinusman'I3huricactc.IthasbecncutoverinIargcarcasduringtl1clastscveraldcc-adcsandtl1coldforcstI1asbccndamagcdscri-ousIy.Noxt'n1ostoftl1cml1a\'cbcenreplacc… 相似文献
6.
土壤水分梯度对阔叶红松林结构的影响 总被引：2，自引：0，他引：2
2002年8月,在吉林省白河林业局红石林场(12755E,4230N),沿着一个山坡设置了一个长宽为112m8m、包含14个样方的样带。调查了群落结构、0-10cm和10-20cm的土壤含水量、枯落物现存量及其C、N、P含量,主要树种的叶片和枝条的C、N、P含量。沿着山坡的不同位置土壤含水量的不同导致阔叶红松林的群落结构发生变化。蒙古栎的比例随着土壤含水量的下降而逐渐升高,而其他主要阔叶树种则逐渐减少乃至消失。枯落物的水分变化趋势与土壤一致。在不同坡位枯落物的分解状况不同,干重差异显著。坡下枯落物含量较坡上的丰富,部分原因在于群落结构的变化。水分和养分含量的变化影响了枯落物的成分、降解及其养分的释放,进一步影响了林木的生长速度和林分结构并最终影响整个生态系统。图7表2参14。 相似文献
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8.
According to a great deal of field investigation and detailed indoor analysis, the natural regeneration pattern and process
of Korean pine population under natural Poplar-birch forest has been uncovered. The results show that the regeneration quantity
and quality of Korean pine population under mountainous Poplar-birch forest and mountainous white birch forest are better
than those under valley moss-grass White Birch forest and virgin broad-leaved Korean pine forest. Korean pine population shows
aggregated distribution, the mass-occurrence period of Korean pine population is behind the mass-occurrence period of Poplar-birch
population. Various aged Korean pines growth is affected by different stand structure factors. Man-made lighting tending can
accelerate the regeneration process and increase the regeneration quality of Korean pine population. It is feasible to set
up regeneration recombination of upper layer White Birch and lower layer Korean pines. 相似文献
9.
Shengdong Liu Shirui Dong Ruitong Liu Qingfan Meng Yan Li Hongrui Zhao Yinghua Jin 《林业研究》2022,33(1):333-342
Carabid beetles,predatory insects,are abundant in forests and sensitive to environmental changes.The dis-tribution patterns and diversity of carabid beetles in several natural forests were studied to provide a basis for evaluating the importance of a forest in the protection of carabid beetle diversity.Carabids were captured by pitfall traps during their seasonal activity from 2012 to 2013 in a poplar-birch forest,ash-walnut forest and broad-leaved Korean pine forest.A total of 5252 individuals,representing 21 species,were col-lected.Carabid abundance was highest in the broad-leaved Korean pine forest and lowest in the ash-walnut forest.Carabus billbergi Mannerheim and Pterostichus pertinax(Tschitscherine) were the dominant beetle species in each stand.Carabus canaliculatus Adams was dominant in the poplar-birch and ash-walnut forests,and Leistus niger Gebler was dominant in the ash-walnut forest.The carabids were affected differently by stand factors.C.billbergi and P.per-tinax was positively correlated with mean DBH.C.cana-liculatus and L.niger were not positively correlated with any stand factors.The broad-leaved Korean pine forest with greater age,large DBH and thick leaf litter fostered a high diversity of carabid species.The main yearly activity period for most carabids was during July.Different carabid species responded differently to seasonality,and the activity period of several species was relatively late (August) in the year. 相似文献
10.
IntrodedionEcologicaIstudieshavebeenconductedli1theBroad-leavedKoreanpineforestatMt.Changbaiformanyyears[1].Sincetheintroductionoftheconceptofgapphaseregeneration,relationshipbetweengapandregenerationoftheforesthasobtainedmoreattention.Detailedinves-tigationonspeciescomposition,vegetationstructureandtheirroleindetermininggapregimeislackinghowever.Theaimofthepresentstudyistogetadetailedmeas-ureofthespatialpatternsofcanopytreesandrelatethistothegapformation,gapsizeandtheirroleinregenerationoft… 相似文献
11.
IntroductionGaPSinforestSwereoftenfomledduetobigtreesfalldown.Regenerationandgrowtl1inthegapsincreasebe-causeofIheAnprovementoflightcondition-Thegapwillbefilledwithnewregeneratedtrees.Wattnamedtl1isforesIdynamicsastheforestgrowtllcycle.SinceD.Bot-kindevelopedthefirstGapmo`Iel(JANOWAnlodel)basedontheforestgrowthcycletheory,dleresearchongapmodelbecameoneofthemostactivedirectio11slilecologybecauseofJANoWAnlodeI'ssuccess.H.Sl1ug-artandhisstUdentSmadegreatc()ntributio11stogapmodeI'sdeve… 相似文献
12.
China’s 13 th 5-year forestry plan explicitly requires the end of commercial harvesting and the improved management of natural forests by means of adjusting and optimizing forest structure and developing high-quality forest production.This requires the quantification of stand structure and species diversity.In this study,species distribution,association and size differentiation in a mixed broad-leaved/Korean pine(Pinus koraiensis Siebold&Zucc.)forest in Mudanfeng National Nature Reserve were analyzed using three spatial structure indices:uniform angle index,complete mingling index,and size differentiation index.The results show that the species were randomly distributed,with a moderate size differentiation and high mixed structure.Three dominant species exhibited different patterns in terms of the three indices and their bivariate distribution.Overall,Korean pine showed an opposite trend to Manchurian maple(Acer mandshuricum Maxim.),whereas the distribution pattern of Manchurian linden(Tilia mandshurica Rupr.&Maxim.)was similar to that of the entire stand.Our work contributes to further the knowledge of population structure in order to optimize the structure of secondary forests and plantations. 相似文献
13.
基于28个20mx90m样地的调查数据,利用Lotka-Volterra模型,本文分析了长白山北坡阔叶红松(Pinuskoraiensis)林和云冷杉林(也叫暗针叶林)群落交错区优势树种之间的竞争及动态。结果显示:在自然条件下,群落将向两个方向分化,一是以云杉(PiceajezoensisandP.koraiensis)和冷杉(Abiesnephrolepis)为优势的群落,并在达到平衡时冷杉占绝对优势(相对优势度的77.1%):另一种是以红松或云冷杉和阔叶树占绝对优势的针阔混交林,并在达到平衡时,阔叶树在阔叶红松林中占相对优势度的50%,在云冷杉一阔叶林类型中占66%。同时,本研究说明:(1)阔叶红松林和云冷杉林都是长白山气候顶极群落:(2)交错区具有过渡性质:(3)森林群落的分化结果说明演替的方向受局部生境的影响。图1表3参24。 相似文献
14.
本文基于阔叶红松林30hm2(500m×600m)固定监测样地,分析了红松在各林层(主林层、次林层、林下层)的空间分布、各林层之间的关联性。结果显示:(1)红松在各林层都在小尺度上呈聚集性分布,大尺度上呈随机分布;且在低林层聚集性强度高于高林层。(2)红松各林层关联性表现为主林层与次林层在小尺度上呈正相关,大尺度上关联性不显著;主林层与林下层在小尺度上呈负相关,大尺度上关联性不显著;次林层与林下层在所有尺度上呈现显著正相关。说明红松种子扩散和红松个体间竞争对空间分布起着重要作用。 相似文献
15.
东北地区阔叶红松林恢复的相关问题研究 总被引：4，自引：0，他引：4
东北林区现有林经营面临的首要任务是恢复阔叶红松林。栽针保阔是恢复阔叶红松林的科学理论,但还需时间的检验并不断完善。天保工程的实施为提高现有林生产力、恢复阔叶红松林提供了历史机遇,但在实施过程中还存在诸多问题,需要转变观念,正确认识。以近自然森林经营理论为指导,适当发展红松人工林具有重要意义,落叶松人工林可以通过人为诱导向阔叶红松林发展。传统意义上的封山育林不利于阔叶红松林的恢复,应由“封山”向“育林”转变。 相似文献
16.
在13年生马尾松林分中,通过间伐,在林下套种鹿角栲、格氏栲和苦槠等3种珍贵阔叶树种。采用裂区试验设计,选择上层林马尾松保留密度为主处理,分别设0(裸地)、600、900、1125株·hm-24个水平;副处理为鹿角栲、格氏栲和苦槠3种栲属树种。试验结果表明:在马尾松林下套种鹿角栲、格氏栲、苦槠3个树种,造林成活率较高,生长速度较快;保留的马尾松生长量得到提高,有利于培育马尾松大径材。上层林密度控制在900～1125株·hm-2为宜。异龄复层林枯枝落叶量大,同时可以改善林分小气候,有利于早期较耐荫鹿角栲、格氏栲、苦槠树的生长,促进枯枝落叶的分解,改善土壤肥力。表明马尾松林下套种栲属阔叶树种是一条培育马尾松大径材,保护和发展中亚热带珍贵阔叶树种,同时提高生态功能的有效途径。 相似文献
17.
河岸带是森林小流域单元的重要组成部分之一。由于河水的影响和边缘效应等因素的综合作用,河岸带植物群落与远离河岸带的森林群落在组成、结构和分布格局等方面存在较大差异,其群落最小面积也不同。本文对长白山原始阔叶红松林河岸带植物群落最小面积和物种丰富度进行了探讨。结果表明河岸带植物群落的最小面积均小于森林内部植物群落的最小面积。对于长白山原始阔叶红松林群落而言,在河岸带,包括群落的60%、80%、90%植物种类时的平均最小面积分别为80m2、180m2和320m2左右;;对应于远离河岸带的森林内部,包括群落的60%、80%、90%植物种类时的平均最小面积分别为260m2、380m2和480m2左右。河岸带植物群落的物种丰富度、均匀度和Shannon-Wiener指数普遍高于森林内部植物群落,但优势度则相反。表4参20。 相似文献
18.
在黑河市平山林场选取环境条件(如坡度、坡向、郁闭度等)相似的阔叶混交林、落叶松阔叶林、红松阔叶林3种森林群落类型样地灌木进行分析的结果表明,红松阔叶林的Gleason指数、Shannon-Wiener指数、Simpson指数都较大,其物种丰富度和多样性均较高;毛榛子为各林分类型下灌木层的主要物种。 相似文献
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Broad-lcafKorcanpi11cforcstbccol11csPoplar-bircl1forcstaftcrburntandfcllcdinbigarcas.Ca11tl1iskindofPopIar-bircl1forcstrccot'crtoclin1axco1nl11unity-trirginbroadlcafKorcanpincforcst9Whatistl1erclationsl1ipbctt`.ccnPoplar-birchforcstandKorcanpil1cforcst?Ho`"docsKorcanpincPOpu1ationrc-gencratcundcrnaturaIPoplar-birchforcst?AllthescprobICInsl1a\'caIrcad}'attractcdforcstcrsattcntionforaIOI1gtil11c.Tllccarh'studicsshox'cd:itt'asinct-ita-blcthatbirchforcstcouldfonnonbun1ingsitesx"ithil1t'irg… 相似文献