择伐经营对天然阔叶米槠林生长的影响.pdf

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1、第34卷第3期中南林业科技大学学报V_0l_34No．32014年3月JournalofCentralSouthUniversityofForestry&TechnologyMar．2014择伐经营对天然阔叶米槠林生长的影响戎建涛，黄清麟，张晓红(1．温州科技职业学院，浙江温州325006；2．中国林业科学研究院资源信息研究所，国家林业局林业遥感与信息技术重点实验室，北京100091)摘要：以5条天然阔叶米槠林样带为研究对象，研究不同择伐强度(对照、16．97％、17．59％、23．37％、30．63％)对林分

2、及不同林层的断面积生长率、蓄积生长率的影响。结果表明：择伐与对照相比，能够显著促进林分生长，林分断面积和蓄积生长率都随着择伐强度的增加而增加，但不同择伐强度之间差异不明显，与对照差异显著；每条样带中，天然阔叶米槠各林层与全林断面积和蓄积生长率排序均为第1II林层>第1I林层>第1林层>全林；择伐样带各林层生长率大于对照样带同林层生长率，30．63％择伐强度样带和23．37％择伐强度样带各林层与对照样带同林层生长率差异显著，其余择伐强度样带各林层生长率与对照样带同林层生长率差异不显著。关键词：天然米槠林；天然阔叶

3、林；择伐；断面积生长率；蓄积生长率中图分类号：$752．2文献标志码：A文章编号：1673．923X(2014)03—0043．06Effectsofdifferentselectingcuttingongrowthofnaturalbroad—leavedCastanopsiscarlesiiforestRONGJian-tao，HUANGQing—lin，ZHANGXiao—hong(1．WenzhouVocationalCollegeofScienceandTechnology,Wenzhou325006

4、，Zhejing，China；2．KeyLab．ofForestryRemoteSensingandInformationTechnologyofStateForestryAdministration，InstituteofForestResourceInformationTechniques，ChineseAcademyofForestry,Beijing100091，China)Abstract：Fivesampleforestbeltswithdiferentselectingcuttingintensi

5、ty(control16．97％，17．59％，23．37％，30．63％)innaturalbroad—leavedCastanopsiscarlesiiforestwereestablishedtostudytheefectsonbasalareaandvolumegrowthrateinstandandtreelayers．Theresultsshowthatcomparedwiththecontrol，thediferentselectingcuttingmeasuresallhadsignifican

6、teffectsonthestandgrowth，thegrowthratesofstandbasalareaandvolumewereincreasedwiththeriseofselectingcuttingintensity,butthegrowthratesamongdiferentselectingcuttingintensitystandshadnosignificantdiferences，andthegrowthratesbetweendiferentselectingcuttingintens

7、itystandsandthecontrolstandallhadsignificantdiferences；Ateverysamplebelts，thegrowthrateorderofbasalareaandvolumewasthefollows：thirdtreelayer>secondtreelayer>firsttreelayer>wholestand；thegrowthratesofbasalareaandvolumeforthreetreelayersunderdiferentselectingc

8、utingintensitywerehigherthanthatofthecontrolstand；eachtreelayergrowthrateofsamplestandunder30．63％and23．37％selectingcuttingintensitydiferedsignificantlywiththecorrespondingtreelayergrowthrateofth