共查询到20条相似文献，搜索用时 125 毫秒
1.
红松果林培育及采穗圃营建技术探讨 总被引：1，自引：0，他引：1
对带岭林业实验局的红松果林培育进行规划,分为常规红松果林和无性系红松果林两类;探讨不同类型红松果林培育及红松果林采穗辅营建的技术和管理措施,分析经济效益。 相似文献
2.
3.
《辽宁林业科技》2021,(5)
该文分析了辽东山区异砧红松无性系结实性状和种子营养成分,结果表明:异砧红松无性系结实性状优于本砧红松无性系。异砧红松无性系单株结果数和单个球果重量分别高出红松本砧嫁接苗木的59.4%和8.1%;种子的平均长、宽比红松本砧无性系种子分别大1.56 mm、1.29 mm。种子出仁率和千粒重分别比红松本砧嫁接大4.67%和164.05 g;种子营养成分与本砧红松无性系种子营养成分没有显著差异。所含营养物质的种类并未因异砧的改变而发生改变;营养物质含量差异也不大。异砧嫁接缩短了红松果林建园时间,促进了红松结实,提高了红松果林的产量和质量,为辽东山区营建红松果林增加了一个途径,同时节约了大量的红松实生苗,降低苗木培育成本。 相似文献
4.
5.
系统地分析了黑龙江省林区对营造红松阔叶混交果林的必要性和现实意义,首先考虑的是经济效益好、市场风险小且长期稳定的树种和林种,以解决林地经营中长期收益和近期生计问题.因此,培育红松无性系果林与阔叶混交有着广阔的市场经济前景,从发展黑龙江省林区产业经营的角度探索地区经济发展的新思路. 相似文献
7.
8.
9.
10.
11.
Broad-lcavedKoreanpincforcstisthcclimaticclimaxconinunitVofnortheastmoun-tainousregionsofChina.AsthemaintreesPecies,Koreanpinehasexccllentwood.AgreatattentionbasbccnpaidtorecoveringtheseforesttyPesafterharvesting.Additional1y,KoreanpineisoneofkeyregcncrationtreesPeCiesinthisregion.TherehasbeenlargeareaofKorcanpincplantations.Howevcr,thercaresomeproblemsncedingtobestUdicdfwtheramongwhichoneistoselectsuitabIeropenerationapproacl1esofKoreanpincforesls.WHATISTHEPROBLEM?ThcnatUralregen… 相似文献
12.
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
13.
本文指出了发展绿色红松果林基地建设的意义及必要性,并结合市场等的实际情况,介绍了绥棱林业局绿色红松果林基地建设的优势条件及其可行性。 相似文献
14.
15.
Korean pine (Pinus koraiensis) and broadleaved mixed forest in Northeast China has been changed regressively into secondary forest with almost no conifers.
Planting Korean pine trees under the canopy of secondary forest is a feasible approach for recovering Korean pine and broadleaved
mixed forest. For establishing an effective growth promotion method for under-canopy planted young Korean pine trees, two
stands were selected as the experiment plots, Stand A (planted in 1989) and Stand B (planted in 1982), and an experiment of
microenvironment regulation was conducted relying mainly on Opening degree (K=1, K=1.5, K=2, CK) in 2004. The results were
shown that the adjustment had promoted growth of diameter and height of Korean pine planted in Stand A and Stand B, and had
a significant influence on the growth rate of basal diameter, diameter at breast height and height in the two growth stands.
The four years periodic increment of mean diameter and height of Korean pine planted in 1989 and in 1982 after regulation
in K=1 level were 63.4% (D0) and 82.7% (H), 64.8% (D1.3) and 69.7% (H) higher than that of control respectively. Quantitative regulation had significant influence on specific leaf
area of Korean pine planted in 1989, and the current year specific leaf area (SLA) was lager than perennial year SLA. Quality
indexes of natural pruning capacity, normal form quotient and crown size was not significantly changed but shown a positive
tendency. The regulation scheme of Opening degree K=1 might be proper for adjusting the microenvironment of Korean pine trees
planted under the canopy of secondary forest when the Korean pine trees were in the growth period of 15 to 26 years old in
the experiment region. 相似文献
16.
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
17.
lNTRODUCTIONTherhythInofKorcanpinegrowingandtrpearchitectUreissubjectedtoitsownl1crcd-ityandforeststructUre.Tl1cil11portantefTcctsofgapdynamicsarethereasonsthatmaketl1cKoreanpinetrceformhighqualityoftimbcr.Whilecurrentn1anagemcntofKoreanpincforestmainlyfocusesonpurestand,thccco-logicalrelationshipsbetWcenKoreanpineandothcrsPecicsinaconununityareneglected,thcprimitivebiologicalconditionislost.TheKo-reanpinetrecsinplantationcasilydivergeonthctOpofmainsten1,thesescverelyaITectthcgrOedqu… 相似文献
18.
IntroductionKoreanpine(PinuskOraiensisSieb.etZucc.)isoneofthemostimportanttimberspeciesanditisnaturaIIydistributedinHeilongjiang,JiIinandLiaon-ingprovincesinChina.ManyforestryresearchersmadeextensiveandprofoundstudiesonthisspeciesJiangYiyin(1985)studiedthegroWthandgrowthmodelsforpIantationsofKoreanpine.However,veryfewpaperswerefoundonthegroWthmodeIsofnaturalKoreanpineforest.Koreanpinehasa1onggroWthperiod.ForextensivelymanagingKoreanpineforest,itneedstheJorestrytabIeswithhighac-Curacy… 相似文献
19.
分析了中国东北小兴安岭林区红松种群的生活史过程及其影响因素,对红松生活史的４个阶段进行了分析,并讨论了其进化和保护对策．红松的传粉和受精主要受天气条件的影响．林冠下的光照是控制红松幼苗生长和存活的主要因素．红松种子生产的周期性波动会引起有关动物种群的相应变化．动物是阔叶红松林生态系统中不可缺少的组成成分,松鼠在红松种群的天然更新中起着非常重要的作用．了解森林生态系统中物种的协同进化关系对于我们保护森林生物多样性和生态系统的完整性有着重要的意义．在红松的保护中,我们不仅要保护树木本身,而且还应当保护与红松相关的动物、生境乃至整个生态系统． 相似文献
20.
Large scale harvest of Korean pine(Pinus koraiensis) seeds as a food product in the mixed Korean pine-hardwood forest of northeastern China poses a serious threat to the sustainability and restoration of this endangered regional ecosystem.Seed collection over past decades greatly reduced the seed bank and subsequent seedling and sapling recruitment,and impacting a wide array of granivorous animals that rely on the pine seeds.We surveyed Korean pine seeds,including solid seeds(SS),insect consumed seeds(ICS) and other(animal) consumed(OCS) kernels,of the seed bank(forest floor and the top 10 cm of mineral soil),the seedlings and saplings from 1 m 2 sample plots in five forest types in Liangshui Nature Reserve(LNR) of the southern Xiao Xing’an Mountains in northeastern China to provide accurate information for assessing the Korean pine regeneration potential.The average number of pine seeds in the seed bank were 11.2 seeds/m 2,9.1 seeds/m 2,4.6 seeds/m 2,1.1 seeds/m 2,and 0.2 seeds/m 2 in Korean pine-basswood forest,mixed Korean pine-hardwood forest,mixed conifer-hardwood forest,white birch forests,and oak forests,respectively.In the first three forest types,percentages of SS(potentially viable seeds) were 11.2%,3.5% and 27.8%,respectively.The percentages of ICS(not viable seeds) were consistent at around 35%.The higher but variable percentages of OCS(not viable seeds) indicated high seed predation in these forests.Compared with other studies,we recorded higher percentages of seed damage,probably due to our survey approach and the increased depth of seed bank sampled in our study.Depletion of pine seeds in the seed bank greatly reduced seedling and sapling recruitment.Densities of pine seedlings varied from about 180 trees/ha in the mixed Korean pine-hardwood forest to about 5,400 trees/ha in the mixed conifer-hardwood forests and showed a high degree of spatial variation.Saplings were rare in the mixed Korean pine-hardwood forest,but ranged in the thousands in other forests.Large scale pine seed harvest has seriously threatened the sustainability of the mixed Korean pine-hardwood forest ecosystem.Scaling down the seed harvest or supplemental planting of pine saplings are urgently needed to maintain the health of the existing Korean pine forests and to restore this endangered ecosystem. 相似文献