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时间:2020-04-17
《不同改良剂对剑麻累积土壤重金属的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、西南农业学报2014年27卷4期1632SouthwestChinaJournalofAgriculturalSciencesV01.27N4文章编号:1001—4829(2014)04—1632一o5不同改良剂对剑麻累积土壤重金属的影响潘丽萍,张鹏,方培结2,杨惟薇,胡清菁2,顾明华,张超兰2(1.广西大学农学院,广西南宁530004;2.广西大学环境学院,广西南宁530004)摘要:采用盆栽试验,研究在重金属复合污染的土壤中添加改良剂(泥炭、柠檬酸和海泡石)对土壤pH值、锅、铅、锌的有效态含量和剑麻对
2、重金属累积的影响。结果表明:与对照相比,海泡石提高了土壤的pH值,而柠檬酸降低了土壤的pH值,泥炭则对土壤pH值影响不大;3种改良剂均显著降低了土壤有效态重金属的含羞,其中,以海泡石降低土壤有效Pb和zn的效果最佳,其有效态Pb和zn分别下降了41.44%和3O.5O%,其次是柠檬酸,其有效态Pb和zn分别下降了29.5O%和26.4o%,泥炭处理的土壤有效态Pb和zn分别下降了26.8O%和22.7O%;但三种改良剂对土壤有效cd的影响差异不显著。添加改良剂能改善剑麻的生长,提高剑麻生物量,促进剑麻对重
3、金属的累积,并且以海泡石的改善效果最佳,其生物量达到116.52S/株,分别是添加泥炭、柠檬酸的1.74倍、1.25倍,剑麻对Cd、Pb和zn的累积量分别是22.51ms/株、25.44ms/株和18.06ms/株。关键词:泥炭;柠檬酸;海泡石;剑麻;重金属中图分类号:X53文献标识码:AEfectofDifferentAmendmentsonHeavyMetalsAccumulationinSisalPANH-ping,ZHANGPeng,FANGPei-jie,YANGWei—wei,HUQiug-j
4、ing2,GUMing-hua,ZHANGChao—lan‘(1.CollegeofAgriculture,GuangxiUniversity,GuangxiNanning530004,China;2.CollegeofEnvironment,GuangxlUniversity,GuangxiNanning530004,China)Abstract:ThisstudyWaSusedtodeterminetheefectofdiferentamendmen~(peat,citricacid,meerscha
5、um)onsoilpH,heveymetals(Cd,Pb,Zn)availability,andtheiraccumulationinsisa1.TheresultsshowedthatsoilpHsignificantlyincreasedordecreasedundermer-schaumapplicationandcitricacid,respectively.NosignificantchangeWaSdetectedinsoilpHunderpeattreatment.Alltreatment
6、ssisni~·candydecreasedheavymetals(Cd,Pb,Zn)availability.Comparedwithcontrol,meerschaumadditionsignificantlydecreasedtheacid-ex—tractablecontentofPbandZn,inparticular,theavailabilityofsoilPbandZndecreased41.44%and30.50%,respectively.Citricacidcouldmakethea
7、vailabilityofsoilPbandZndecreased29.5O%and26.40%andthepeatmaketheavailabilityofsoilPbandZnde-c1"e88~26.80%and22.70%.However,efectofamendmentsonsoilCdavailabilitywagnotsignificant.Ontheotherhand.theamend-mentsappHeationpromotedsisalgrowthandincreasedheavym
8、etalsaccumulation.Thehighestplantbiomagsandheavymetalsaccumulationw88observedinthemeerschaumtreatment.Plantbiomass(116.52g/plant)Wag0.74and0.25timeshigherthanthatofpeatandcitricacidtreatments,respectively.Theaccumul
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