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1、濱海濕地原生灌草群落土壤養(yǎng)分與鹽分關(guān)系 摘要:通過灌草群叢劃分、土壤采樣以及室內(nèi)測定、數(shù)理統(tǒng)計(jì)等方法,分析了黃河三角洲原生濕地灌草群落土壤的養(yǎng)分、鹽分分布特征及相互關(guān)系,發(fā)現(xiàn)原生灌草群落土壤可溶性鹽的垂直分布變異性較大,其中,堿蓬群叢與檉柳群叢土壤可溶性鹽分布具有較強(qiáng)的表聚性,而土壤有機(jī)質(zhì)含量表現(xiàn)為蘆葦群叢>檉柳群叢>堿蓬群叢,且灌草群落中土壤C/N值都大于5,表明其有機(jī)質(zhì)腐殖化程度較高。另一方面,土壤全氮與有機(jī)質(zhì)存在明顯的線性正相關(guān);而土壤全鹽與有機(jī)質(zhì)、全氮之間存在明顯的倒數(shù)關(guān)系,表明全鹽對二者的制約作用,其中15~20g/kg的土壤鹽分范圍對應(yīng)的是土壤全氮、有機(jī)質(zhì)由迅速
2、減少向緩慢減少的變化趨勢。研究結(jié)果可以為鹽堿土改良提供重要參考?! £P(guān)鍵詞:黃河三角洲;灌草群落;土壤鹽分;土壤養(yǎng)分;分布特征 中圖分類號:S153文獻(xiàn)標(biāo)志碼:A文章編號:16721683(2015)05089506 Relationshipbetweensoilnutrientandsalinityofnativeshrubherbcommunitiesinthecoastalwetland CHENYongjin,JINGShuhui,DUTingting,LIUJiazhen,XUMengchen,LIUYaqi (SchoolofEnvironmentandP
3、lanning,LiaoChengUniversity,LiaoCheng252059,China)5 Abstract:ThedistributioncharacteristicsofsoilnutrientandsoilsalinityofnativeshrubherbcommunitiesintheYellowRiverDeltawetlandandtheirrelationshipwereinvestigatedusingthemethodsofshrubherbassociationclassification,soilsampling,laboratoryana
4、lysis,andmathematicalstatistics.Theresultsshowed(1)theverticalvariationofsoilsolublesaltdifferssignificantly,andthedistributionofsoilsalinityoftheSuaedaglaucaassociationandTamarixchinensisassociationshowsthetrendofsurficialaccumulation;(2)theorderwithhightolowofsoilorganicmattercontentisPhr
5、agmitescommunisassociation,Tamarixchinensisassociation,andSuaedaglaucaassociation;(3)theC/Nrateoftheshrubherbcommunitiesishigherthan5,whichsuggestshighhumificationdegreeofsoilorganicmatter;(4)soiltotalnitrogenhasapositivecorrelationwithorganicmatter,whilesoiltotalsalinityhasaninversecorrela
6、tionwithorganicmatterandtotalnitrogen,whichindicatestherestrictionoftotalsalinityonorganicmatterandtotalnitrogen;and(5)thesoilsalinityrangefrom15to20g/kgcorrespondstothetransitionfortherapidtoslowreductionofsoiltotalnitrogenandorganicmatter.Theresultscanprovidereferencefortheimprovementofsa
7、linesoil. Keywords:YellowRiverDelta;shrubherbcommunities;soil5salinity;soilnutrient;distributioncharacteristics 黃河三角洲是我國暖溫帶最廣闊、最完整、最年輕的濕地生態(tài)系統(tǒng),因此其不僅關(guān)系山東省的區(qū)域協(xié)調(diào)發(fā)展,而且也是國家區(qū)域協(xié)調(diào)發(fā)展戰(zhàn)略的重要組成部分。不過,生態(tài)環(huán)境的脆弱,尤其是土壤鹽漬化嚴(yán)重是該地區(qū)面臨的主要環(huán)境問題。 土壤鹽分含量常常影響植物對養(yǎng)分的吸收,表現(xiàn)出不同地貌單元植被分布特