資源描述:
《不同林地土壤有機(jī)碳儲(chǔ)量及垂直分布特征.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、中國(guó)蓉學(xué)通提2010,26(9):132—135ChineseAgriculturalScienceBulletin不同林地土壤有機(jī)碳儲(chǔ)量及垂直分布特征楊曉梅,程積民,孟蕾,韓娟娟(中國(guó)科學(xué)院水利部水土保持研究所,陜西楊凌712100;西北農(nóng)林科技大學(xué)動(dòng)物科技學(xué)院,陜西楊凌712100)摘要:基于樣地調(diào)查與室內(nèi)分析,研究了黃土高原子午嶺林區(qū)天然柴松林、遼東櫟林及人工油松林3種林地土壤有機(jī)碳儲(chǔ)量及其垂直分布特征。結(jié)果表明:(1)3種林地土壤有機(jī)碳含量柴松林為l3.67g/kg,遼東櫟林為13.95g&g,油松林為l1.43g&g,并隨著土壤深度的增加呈現(xiàn)遞減的趨
2、勢(shì),不同林分變化幅度差異不同,且各土層間的差異達(dá)到了顯著性水平。(2)3種林地土壤有機(jī)碳密度差異顯著,土層間碳密度變化范圍為1.06~3.67kg/m,并隨土壤深度增加而減少;在整個(gè)土壤垂直剖面上,有機(jī)碳碳密度在9.38~11.43kg/m2之間,其中0~50cm深度碳密度的貢獻(xiàn)率達(dá)80%以上。(3)3種林地土壤碳儲(chǔ)量偏低,平均為105.2t/hm,不同林分間的差異較大。關(guān)鍵詞:土壤有機(jī)碳;碳儲(chǔ)量;垂直分布;森林類型中圖分類號(hào):$714.5文獻(xiàn)標(biāo)志碼:A論文編號(hào):2009.2786FeaturesofSoilOrganicCarbonStorageandVer
3、ticalDistributionindiferentForestsYangXiaomei,ChengJimin,MengLei,HanJuanjuan(InstituteofSoilandWaterConservation,ChineseAcademyofSciencesandMin~tuofSoilResources,YanglingShaanxi712100;CollegeofAnimalSciences,NorthwestA&FUniversity,YankingShaanxi712100)Abstract:Basedonthefielddataand
4、laboratoryanalysis,westudiedthesoilorganiccarbonstorageandverticaldistributionfeaturesaboutnaturalPinustabulaeformisfshekannesis,Q.ereusliaotungensisandartificialtabulaeformisforestinZiwulingforestareaofLoessPlateau.rheresultswereshowedasfollowings:1)Contentofsoilorganiccarbonwas:13
5、.67g/kg,13.95g/kg,and11.43g/kg,respectivelyforPinustabulaeformisshekannesis,Quercusliaotungensisandartificialtabulaeformis.Withdepthofsoil,organiccarboncontentsgenerallydecreased,buttherangewasdifferentinthesethreeforesttypes.Meanwhile,greatsignificancedifferenceshaveappearedamongdi
6、fferentsoillayers.2)Soilcarbondensityinthethreeforesttypeschangedgreatly,witharangeof1.06~3.67kg/mforfivesoillayers.Furthermore,soilcarbondensitydecreasedgenerallywiththedepth,aswellascarboncontent.Inthewholesoilprofile,therangeofcarbondensityinthesethreeforestswasfrom9.38kgCmto11.4
7、3kg/m.However.80%carbonconcentratedin50amdepthofsoil.3)Soilcarbonstorageislowinthesethreeforests.Theaverageofstoragewas105.2t/hm,andgreatdifferencesappearedbetweenforesttypes.Keywords:soilorganiccarbon;carbonstorage;verticaldistribution;foresttypes0引言Houghton等研究表明,土壤中所存儲(chǔ)的碳是植被中全球氣候的變
8、化,引起了許多科學(xué)家對(duì)陸地生態(tài)的2.5