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1、第20卷 第4期中 南 林 学 院 学 报Vo1.20No.42000年12月JOURNALOFCENTRALSOUTHFORESTRYUNIVERSITYDec.2000a[文章编号]1000-2502(2000)04-0020-05莽山几种典型低质低效次生林结构及成因分析11233唐代生,曾思齐,颜立红,杨寿权,欧阳村香(1.中南林学院资源与环境学院,中国湖南株洲412006;2.湖南省森林植物园,中国湖南长沙410016;3.莽山林业管理局,中国湖南宜章424221)[摘 要]在湖南省莽山林区次生林的分布区内,设置标准调查样地,测定生态环境
2、因子,调查植物群落、林分状况及次生林成因.根据该区林分的建群种和有指示意义的灌木种类,在莽山林区选择5个典型低质低效次生林即:(1)硬斗石栎、山鸡椒、南岭箭竹为主;(2)杉木(萌芽)、红楠、东方古柯、南岭箭竹为主;(3)马尾松、金毛石栎、鹿角杜鹃、苦竹为主;(4)马尾松、铁芒萁为主;(5)马尾松无灌草次生林.分别对这5种类型低质低效林分的结构特征和成因进行分析,从而可知低质低效次生林的成因是:(a)自然条件差,如高寒、坡陡、土壤贫瘠;(b)经营方式不合理,如缺乏有效的抚育间伐,人为干扰破坏.[关键词]莽山林区;低质低效;次生林;林分结构;成因[中
3、图分类号]S718.54+2[文献标识码]AAnalysisoftheStructureCharacteristicsandFormationReasonsofSeveralTypicalDefectiveandLow-effectSecondaryForestsinMangshan11233TANGDai2sheng,ZENGSi2qi,YANLi2hong,YANGShou2quan,OUYANGChun2xiang(1.CollegeofResourcesandEnvironmentofCSFU,Zhuzhou412006,Hunan,Ch
4、ina;2.HunanForestBotanicalGarden,Changsha410116,Hunan,China;3.ForestryManagementBureauofMangshan,Yizhang424221,Hunan,China)Abstract:Byusingthesampleplotsofseveraltypicaldefectiveandlow2effectsecondaryforestsdistributedinMangshan,HunanProvince,theecologicalenvironmentfactors,t
5、heforestcommunity,thestatusofthestandsandthereasonsofthesecondaryforestsareinvestigated.Accordingtothedominantplantsandindicativeshrubberyspeciesintheforests,fivetypicaldefectiveandlow2effectsecondaryforesttypesareselectedasthefollowing:①communitymainlyconstitutedbyLithocarpu
6、shancei,LitseacubebaandSinarundinariabasihirsuta;②communitymainlycomposedofCunninghamialanceolata,Machilusthunbergii,ErythroxykunthianumandSinarundinariabasihirsuta;③communitymainlyconstitutedbyPinusmassoniana,Lithocarpuschrysocomus,Rhododendronla2toucheaeandPleioblastusamaru
7、s;④communitymainlycomprisingPinusmassonianaandDicranopterisdichotoma;and⑤communitymainlyconstitutedbynothingbutPinusmassoniana.Afteranalyzingtheformationreasonsandstructurecharacteristicsofthefiveforesttypesrespectively,theresultsshowthathighmountains,stiffslopes,coldclimatea
8、ndinfertilesoilarethemainnaturalrea2sons,andothersreasonsareunreason
