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时间:2019-02-27
《不同经营方式对杉木林采伐迹地土壤c储量的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、维普资讯http://www.cqvip.com第24卷第1期中南林学院学报Vo1.24No.12004年2月JOURNALOFCENTRALSOUTHF0RESTRYUNIVERSITYFeb.2004[文章编号]1OOO一2502(2004)01—0001-05不同经营方式对杉木林采伐迹地土壤C储量的影响方晰,田大伦,项文化(中南林学院生命科学与技术学院,湖南株洲412006)[摘要]多年定位观测的数据.对比分析结果表明:湖南会同22年生杉木林采伐前.林地土壤(0~60cm)层中的C储量为160.
2、38t‘hm~,1O0皆伐后一年林地土壤(0~60cm)层中的C储量损失率为35.O0.二年后损失率为44.65.三年后损失率为43.93;与对照林林地土壤相比,5O间伐和1O0皆伐后三年,林地土壤(0~60cm)层中的C储量损失率分别为16.14%和45.15;4种不同经营方式的采伐迹地土壤(O~60cm)层中的C储量有明显的差异,大小次序为;已郁闭杉木林林地(108.20t.hm)>农用后撂荒地(92.68t·hm一)>经济林栽培地(85.80t·hm一)>自然更新采伐迹地(80.29t·hm一)
3、.未烧地土壤(O~45cm)层中C储量为73.36t·hm-,比火烧地高出了15.20t·hm~,火烧后4O天内林地土壤(O~45cm)层中C储量的损失率为2O.7;杉木林地土壤表层(O~15cm)的C含量明显高于其它层次.其C储量占土壤(O~60cm)层C储量的3O.O4.土壤(O~3Ocm)层中的C储量占53.52.[关键词]林学;森林生态学;杉木林;经营方式;采伐迹地;土壤c储量[中图分类号]$791.27;$714.8;$757.4t4[文献标识码]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
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