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1、農(nóng)業(yè)環(huán)境科學(xué)學(xué)報(bào)2010,29(3):541—545JournalofAgro—EnvironmentScience烏梁素海和岱海的水一沉積物系統(tǒng)中有機(jī)磷分布特征呂昌偉,何江,毛海芳,梁英(內(nèi)蒙古大學(xué)環(huán)境與資源學(xué)院,呼和浩特010021)摘要:以烏梁素海和岱海2個(gè)不同類型湖泊為研究對象,系統(tǒng)探討了2個(gè)湖泊上覆水和沉積物中有機(jī)磷(0卜P)的地球化學(xué)特征。結(jié)果表明,烏梁素海和岱海上覆水中溶解性有機(jī)磷(DOP)的含量范圍分別為0.02~0.12mg·L。1和0.01~0.03mg·L~,2個(gè)湖泊上覆水中DOP均占TDP的60%以上
2、,是上覆水中TDP的重要組成部分和主要存在形態(tài);烏梁素海和岱海沉積物中有機(jī)磷(0r_P)的平均含量分別為19.25~69.40mg·kg。1和168.21~178.41mg·kg;2個(gè)湖泊上覆水中DOP含量明顯高于英格蘭Tanrer河口區(qū),2個(gè)湖泊沉積物中。卜P的含量低于長江中下游淺水湖泊。據(jù)估算,烏梁素海和岱海上覆水中的DOP庫分別達(dá)到12t和10t;這2個(gè)湖泊沉積物中Or—P的差異性反映了湖泊環(huán)境及生態(tài)類型對Or—P生物有效性的重要影響,揭示有機(jī)磷庫是不容忽視的潛在生物有效磷源。關(guān)鍵詞:有機(jī)磷;分布特征;上覆水;沉積物;
3、湖泊中圖分類號(hào):X524文獻(xiàn)標(biāo)志碼:A文章編號(hào):1672—2043(2010)03—0541—05DistributionCharactersofOrganicPhosphorusintheOverlyingWater—-SedimentSystemoftheWuliangsuhaiandDaihaiintheInnerMongoliaPlateau,ChinaLVChang—wei,HEJiang,MA0Hai-fang,LIANGYing(CollegeofEnvironmentandResources,InnerMon
4、goliaUniversity,Huhhot010021,China)Abstract:Inthiswork。theconcentrationsanddistributioncharactersoforganicphosphorus(Or—P)intheoverlyingwater—sedimentssystemsoftheWuliangsuhaiandDaihaiwerediscussed.Theconcentrationrangesofdissolvedorganicphosphorus(DOP)intheoverlyi
5、ngwaterfromtheWuliangsuhaiandDaihaiwere0.02~0.12mg·L1and0.01~0.03mg‘Lrespectively.whichwerehigherthanthoseinthewatersoftheTamarestuary(SWEngland);theDOPconcentrationsaccountfornotlessthan60%ofthetotaldissolvedphosphorus(TDP)indicatingthatDOPwasthedominantspeciesoft
6、heTDP.TheaverageconcentrationrangesofOr—PinthesedimentsfromtheWuliangsuhaiandDaihaiwere19.25~69.40mg·kg~and168.21~178.41mg·kg~respectively。whichwerelowerthanthoseinthesedimentsfromshallowlakesinmiddleandlowerreachesoftheYangtzeRiverAreainChina.Onthebasisofestimate,
7、theDOPpoolsintheoverlyingwateroftheWuliang—suhaiandDaihaiwereof12tand10trespectively.ThedifferencesofOr—Prevealedthedifferencesoftheenvironmentsandecologytypesbetweenthetwolakesandtheimportanceofthepotentialbioavailabilityof0r_P.Keywords:organicphosphorus;distribut
8、ioncharacter;overlyingwater;sediments;lakes磷(P)是生物光合作用和新陳代謝過程中不可缺少的關(guān)鍵元素,與水生生態(tài)系統(tǒng)的生物生產(chǎn)力緊密相關(guān)[”,被認(rèn)為是湖泊初級(jí)生產(chǎn)力的關(guān)鍵限制因子幽,在全球生物地球化學(xué)循環(huán)中起重要作用陽。水環(huán)境中,磷可分為無機(jī)磷和有