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1、維普資訊http://www.cqvip.com第24卷第1期中南林學院學報Vo1.24No.12004年2月JOURNALOFCENTRALSOUTHF0RESTRYUNIVERSITYFeb.2004[文章編號]1OOO一2502(2004)01—0001-05不同經(jīng)營方式對杉木林采伐跡地土壤C儲量的影響方晰,田大倫,項文化(中南林學院生命科學與技術學院,湖南株洲412006)[摘要]多年定位觀測的數(shù)據(jù).對比分析結果表明:湖南會同22年生杉木林采伐前.林地土壤(0~60cm)層中的C儲量為160.
2、38t‘hm~,1O0皆伐后一年林地土壤(0~60cm)層中的C儲量損失率為35.O0.二年后損失率為44.65.三年后損失率為43.93;與對照林林地土壤相比,5O間伐和1O0皆伐后三年,林地土壤(0~60cm)層中的C儲量損失率分別為16.14%和45.15;4種不同經(jīng)營方式的采伐跡地土壤(O~60cm)層中的C儲量有明顯的差異,大小次序為;已郁閉杉木林林地(108.20t.hm)>農(nóng)用后撂荒地(92.68t·hm一)>經(jīng)濟林栽培地(85.80t·hm一)>自然更新采伐跡地(80.29t·hm一)
3、.未燒地土壤(O~45cm)層中C儲量為73.36t·hm-,比火燒地高出了15.20t·hm~,火燒后4O天內(nèi)林地土壤(O~45cm)層中C儲量的損失率為2O.7;杉木林地土壤表層(O~15cm)的C含量明顯高于其它層次.其C儲量占土壤(O~60cm)層C儲量的3O.O4.土壤(O~3Ocm)層中的C儲量占53.52.[關鍵詞]林學;森林生態(tài)學;杉木林;經(jīng)營方式;采伐跡地;土壤c儲量[中圖分類號]$791.27;$714.8;$757.4t4[文獻標識碼]AEffectsofDifferentMan
4、agementPatternsonSoilCarbonStorageoftheDeforestedLandsinChineseFirPiantationFANGXi。TIANDa—lun。XIANGWen—hua(ResearchSectionofEcology.CSFU.Zhuzhou412006.Hunan.China)Abstract:Basedonthedatacollectedfromlocatedobservationinsuccessiveyears.comparativeanalyse
5、sweremadeinChinesefirplantationatHuitong,Hunan.Resultsshowthatbeforedeforestation,carbonstorageofforest—landsoil(0~60cm)amountsto16O.38t.hm一2inthe22一year—oldChinesefirplantation;thatoneyearafter1OOofclearCut.carbonstorageinthedeforested—landsoil(O~60cm)
6、loses35.O0,twoyears,44.65andthreeyears.43.93;thatcomparedwiththecontrolstandingforest.threeyearsafter50ofthinningand100ofclearCUt,carbonstorageinthedeforested—landsoil(0~60cm)loses16.14%,and45.15respectively:andthatcarbonstorageinthedeforested—landsoil(
7、0~6ocm)indicatesevidentlythediversitywithdifferentmanagementpatterns.Resultsalsoshowthatfourkindsofmanagementpatternsgofromhighstoragetolowinthefollowingorder:theclosedChinesefirforest—lands(108.20t·hm?)>thefallow—landsafterfarming(92.68t·hm一)>theeconom
8、icforest—lands(85.80t·hm一)>thenaturalregenerationdeforested—lands;thatcarbonstorageinthenon—firedlandsoil(0~45cm)isupto73.36t·hm一2whichis15.20t·hmhigherthanthatinthefiredlandsoil;thatcarbonstorageinthefiredlandsoil(O~45cm)loses2O