Nitrogen forms and decomposition of organic carbon in the southern Bohai Sea core sediments-中国Betway体育网页登陆

摘要 Studyonformcharacteristicsofnitrogeninmarinesedimentsistheprimarymethodtoresearchitsbiogeochemicalcyclingandnitrogenformcharacteristicsincoresedimentscanreflecttheprocessandresultsofearlydiagenesisinacertaindegree.Inthispaper,SequentialextractionprocessinnaturalgrainsizewasusedforstudyingtheexistentformsofnitrogeninfivecoresedimentsofthesouthernBohaiSeaforthefirsttime.Nitrogenwasdividedintotwoparts-transferableandfixedbasedonwhetheritcouldbeextractedbythereagent.DistributionsandearlydiagenesisoftransferablenitrogenformsinthesouthernBohaiSeawereresearchedintegratedly.ResultsindicatethatIEF-NandOSFNarepredominantformsintransferablepartinthestudiedcoresediments.Contentsofdifferentnitrogenformsvarydifferentlywithdepth,andhavedifferentdiagenesisprocess.Decompositionconstantoforganicnitrogen(ON)andOCareabout15.51×10-3a-1and4.79×10-3a-1respectively,andthedecompositioncontentofbiogenicelementsC,N,P,SihasthesequenceN＞P＞C＞Si.OC/TN(simplifiedasC/Ninthefollowing)ratioismuchlowerthanOC/ON,whichindicatesthatsedimentpreservesplentyofinorganicnitrogen(IN)and/orfixednitrogen,andthedecreaseofOC/ONratiowithdepthisduetoONreservationinsediments.Generally,transferablenitrogenaccountsformoreproportionofTNinthesurfacelayerthaninthedeeplayerofcoresediments,whereas,somestableformsofnitrogencanactivateandbecometransferableunderappropriateenvironment,whichinducestheproportionoftransferablenitrogeninTNinthedeeplayertobealmostthesameasthatinthesurfacelayer.

1WANG Lisha.The Burial of Biogenic Silica, Organic Carbon and Organic Nitrogen in the Sediments of the East China Sea.海洋科学,2015-03.
2石强;陈江麟;等.Seasonal Cycle Analysis of the Nitrate Nitrogen and Nitrite Nitrogen in the Bohai Sea.海洋科学,2002-01.
3Shi Qiang Gao Zhenhui Yang Jianqiang.Analysis of Interannual Variations of Inorganic Nitrogen in the Bohai Sea.海洋科学,2002-02.
4GAO Jianhua;WANG Yaping;PAN Shaoming;ZHANG Rui;LI Jun;BAI Fenglong.Distribution of organic carbon in sediments and its influences on adjacent sea area in the turbidity maximum of Changjiang Estuary in China.海洋科学,2008-04.
5YANG Shu;YANG Qian;LIU Sai;CAI Deling;QU Keming;SUN Yao.Burial fluxes and sources of organic carbon in sediments of the central Yellow Sea mud area over the past 200 years.海洋科学,2015-10.
6.Sporopollen Assemblage Characteristics of Surface Sediments in Offshore Area of Western Bohai Sea.海洋科学,1999-01.
7Zhihua ZHOU;Congqiang LIU;Huayun XIAO;Jun LI;Zhaozhou ZHU.Carbon and nitrogen isotope records in sediments of Lake Taihu, China, and their paleoenvironmental significance.地球化学,2006-12.
8SONG Ge;ZHAO Xu;WANG Shen-Qiang;XING Guang-Xi;ZHU Zhao-Liang.Dissolved Organic Nitrogen Leaching from Rice-Wheat Rotated Agroecosystem in Southern China.土壤学,2015-01.
9HUANG Qian-Ru;HU Feng;HUANG Shan;LI Hui-Xin;YUAN Ying-Hong;PAN Gen-Xing;ZHANG Wei-Jian.Effect of Long-Term Fertilization on Organic Carbon and Nitrogen in a Subtropical Paddy Soil.土壤学,2009-06.
10姜晓旭;陈冠宇;李玉同;程新路;唐翠明.Phase transition and chemical decomposition of liquid carbon dioxide and nitrogen mixture under extreme conditions.物理,2016-02.

Nitrogen forms and decomposition of organic carbon in the southern Bohai Sea core sediments

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