不同植茶年限茶园土壤pH缓冲容量-苏有健-(1)

pH*12111111＊＊12456002310029pHpHBC10、15、20、25、30．pHBCpHpH4．0～6．0pHBC．pHBCpHBC0．100．06mmol·kg－1·a－1．pHBC、、、．pH1001－9332201410－2914－05S156．3S571．1ASoilpHbuffercapacityofteagardenwithdifferentplantingyears．SUYou-jian12WANGYe-jun1ZHANGYong-li1LUOYi1SUNLi1SONGLi1LIAOWan-you11InstituteofTeaＲe-searchAnhuiAcademyofAgriculturalSciencesQimen245600AnhuiChina2CollegeofEnvironmentalandＲesourceSciencesZhejiangUniversityHangzhou310029China．-Chin．J．Appl．Ecol．201425102914－2918．AbstractInordertoinvestigatetheeffectsoflong-termteaplantingonsoilpHbuffercapacitypHBCthevariationofpHBCanditsinfluencefactorswereinvestigatedinteagardensof10152025and30yearsinLangxiandQimenofAnhuiProvince．Theresultsshowedthattheacid-basetitrationmethodwassuitableforthedeterminationofsoilpHBCofteagardens．Theamountofacid-baseaddedhadapproximatelinearrelationshipwithsoilpHvalueinspecificsectionpH4．0－6．0ofacid-basetitrationcurvessothesoilpHBCcouldbecalculatedbylinearregressionequa-tion．SoilpHBCintheteagardensfromthetworegionsshowedadownwardtrendwithincreasingtheplantingyearswhichdecreasedatratesof0．10and0．06mmol·kg－1·a－1inLangxiandQi-menteagardensrespectively．SoilpHBChadsignificantpositivecorrelationwithCECsoilorgan-icmatterbasesaturationandphysicalclaycontentandsignificantnegativecorrelationwithex-changeableacidandexchangeH+．KeywordsteagardensoilplantingyearspHbuffercapacity．*CAＲS-23-07B、13B08402013KN-09．＊＊[e-mail]2014-02-182014-07-17．1．、、23－5．6．pH4．5～6．05．57．0～20cm＞0．1pH33%＞0．2pH50%pH＜4．08．pH＜4．0．9－10．．2014102510ChineseJournalofAppliedEcologyOct．201425102914－2918DOI:10.13287/j.1001-9332.2014.0163．11－14．15．、、、NH4+H+．、、、pH．AitkenMoody2100pH4．0～7．0pHpHpH．16pHpH4．0～6．0pH．pHpH-BC．11.1QM29°09'18″N117°27'45″E1375～1550mm17．5℃Camelliasinensis．LX31°14'29″N119°17'38″E15．9℃235d1150～1300mm．“S”1030、1530、2032、2530、303015210、15、20、25、30241200～30cm5～8cm．1mm．1.2pHSartoriusPB-10pH2．5∶1EC-CEC1．0mol·L－1NH4Ac0．01mol·L－1EDTA-Na2ICP-OESBS1．0mol·L－1KCl-NaOHNaFH+Al3+SOM17．1．pH5.00g1Table1MainphysicochemicalproperiesofthesoilsintheexperimentSamplesitePlantingyearsClay%Sand%pHOMg·kg－1CECcmol·kg－1ECμS·cm－1BS%EAcmol·kg－11060．119．74．8418．6518．32111．7024．614．45Langxi1556．527．14．6322．1616．5489．4921．956．082047．922．84．4720．1017．3992．9119．866．302553．418．34．2516．5315．2573．2519．536．693043．320．34．0515．2014．7269．9816．257．281049．333．34．7217．2517．71126．5723．955．14Qimen1553．027．24．4520．2117．6894．3422．046．322039．137．24．2322．5416．2484．1720．136．862532．941．63．9918．1915．9775．0918．847．383033．539．73．8217．3315．2872．0315．377．690．01～1mm＜0．01mmPhysicalsandparticlediameterwas0．01－1mmandphysicalclayparticlediameterwaslessthan0．01mm．519210pH1Fig．1Titrationcurvesofteagardensoilwithdifferentplantingyears．ALangxiBQimen．NegativevalueindicatedtheamountofacidandpositivevalueindicatedtheamountofalkalionXaxis．100mLpH=7．00±0．05t=24．6℃0.10mol·L－1HCl0.10mol·L－1NaOH0、0．25、0．5、1．0、2．0、4.0、6．0mL25mL3．25℃50r·min－112h25℃7d5minSartoriusPB-10pHt=22．5±0．3℃18－19．1.3Excel2007Origin8．5．22.11S2pH．．pH．pH4．0～7．0pH4．0～6．020．、pHb、pHb=ΔpH/ΔC．b．pH4．0～6．0pHBC．Ｒ20.95pHpH-BC．pH4．0～6．0．2pHBCpHBC0.10mmol·kg－1·a－1pHBC0.06mmol·kg－1·a－1．Ulrich212Table2ＲegressionequationsandcorrelationcoefficientsoflinearportionofthepHbuffercapacitySamplesitePlantingyearsy=a+bxabＲ2pHpHbuffercapacitymmol·kg－1Soilbulkdensityg·cm－3105．164－0．50630．981519．751．26Langxi205．392－0．54370．983718．411．30305．411－0．61580．960216．241．19405．275－0．59740．973516．831．32505．096－0．62070．959215．961．33105．109－0．56100．993118．821．15Qimen205．220－0．57750．972417．331．18305．438－0．59800．963916．721．22405．320－0．60910．965016．401．20505．418－0．61820．962716．171．25x、ypHxmeantamendmentratemmol·kg－1andymeantthesoilpH．6192253pHBCTable3CorrelationcoefficientsbetweensoilpHbuffercapacitypHBCandsoilpropertiesn=50pHBCSOMCECBSEAEx-HSOM0．792＊＊CEC0．597＊＊0．628＊＊BS0．722＊＊0．664＊＊0．638*EA－0．779＊＊－0．709＊＊－0．392－0．784＊＊Ex-H－0．625＊＊－0．655*－0．431－0．604*0．704＊＊Clay0．565*0．493*0．4680．384－0．683＊＊－0．466SOMSoilorganicmatterCECCationexchangecapacityBSBasesaturationEAExchangeableacidEx-HExchangeablehydrogenClayPhysicalclay．*P＜0．05＊＊P＜0．01．pH4．0～6．0、．2.23、、、、．．322．15．20～22．54g·kg－1．280～820m2·g－1-COOH、-OHH+100～250cmol·kg－1．pH23．r=0．792P＜0．01CECBSpH．pH4．0～6．0K+、Na+、Ca2+、Mg2+BS24．CECBSCEC、BSpHBC．CEC．H+、Al3+．、pHBC．pH．．25．．pHBC．26pHBC．pH4．0～6．0pHBC20mmol·kg－1pH-BCpHBC0．10mmol·kg－1·a－1pHBC0.06mmol·kg－1·a－1．．Slat-tery27pHBC．．28．pHBC．719210pH1WeaverAＲKisselDEChenFetal．MappingsoilpHbufferingcapacityofselectedfieldsinthecoastalplain．SoilScienceSocietyofAmericaJournal200468662－6682AitkenＲLMoodyPW．TheeffectofvalenceandionicstrengthonthemeasurementofpHbuffercapacity．Aus-tralianJournalofSoilＲesearch199432975－9843BedrnaZ．Ｒesistibilityoflandscapetoacidification．Ekologia20071377－864BlackAS．Soilacidificationinurine-andurea-affectedsoil．AustralianJournalofSoilＲesearch200230989－9995HuNLouY-LZhangX-Ketal．Effectsofconservationtillageonthecom-positionofsoilexchangeablebase．ChineseJournalofAppliedEcology20102161492－1496inChinese6StarrMWestmanCJAla-ＲeiniJ．Theacidbufferca-pacityofsomeFinnishforestsoilsＲesultsofacidaddi-tionlaboratoryexperiment