不同施肥结构对酸性冲积菜园土的酸性与交换性能的修复效应.pdf
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呻国虐学(墨提 2013,29(32):274—279
ChineseAgriculturalScienceBulletin
不同施肥结构对酸性冲积菜园土的
酸性与交换性能的修复效应
雷 盼,张杨珠,黄运湘,廖超林,杨甲华,和利钊
(湖南农业大学资源环境学院,长沙410128)
摘 要:为了减少土壤对农业造成的损失以及给生态环境带来的恶化,为保证湖南农业的可持续发展和
生态环境保护提供科学依据,以长沙市东郊浏阳河沉积物发育的冲积菜园土为研究对象,通过田间小区
试验和动态取样与室内测定,研究了不同施肥结构对菜园土酸性、交换性能的改良效应。结果表明:单
纯施用化学肥料处理(NPK)能明显降低土壤pH,施用石灰质物质处理(NPK+MgO和NPK+CaO)能有效
降低表层土酸酸度;交换性铝离子只有在较低酸度的土壤中出现;耕层土壤CEC值相对比较稳定,试验
土壤CEC值在8~lO.75cmol/l(g之间,平均值为9.05cmolg。供试土壤的保肥和酸化缓冲能力比较弱。
关键词:菜园土;土壤酸化;CEC;交换性酸
中图分类号:S158 文献标志码 :A 论文编号:2012—2485
TheStudyonRemedialEffectofSeveralFertilizationStructureson
AcidicVegetableSoilfrom RiverDeposit
LeiPan,ZhangYangzhu,HuangYunxiang,LiaoChaolin,YangJiahua,HeLizhao
(CollegeofResourcesandEnvironment,HunanAgriculturalUniversity,Changsha410128)
Abstract:Inordertoreducethelosscausedbysoilforagricultureandecologicalenvironmentdeterioration,to
guaranteethesustainabledevelopmentofagricultureinHunanandprovidescientificbasisofrtheecological
environmentprotection.A fieldexperimentandlaboratoryanalysiswereperformedtostudyacidcharacteristics
ingardensoilinthesuburbofChangshaCity.Theresultsshowedthat:onlyapplyingchemicalfertilizerscould
significantlyreducesoilpH andpromotesoilacidification.ApplyingMgOandCaOtreatmentscouldeffectively
reducetheacidofsurface soil,buttheeffecton theimprovementofthebottom soilacidwasnotobvious.
ExchangeableacidandpH valuehadan inverserelationship,andonlyattheloweracidity,exchangeable
aluminum ionscouldbeappearedinsoil.TopsoilCECvalueswererelativelystable,andsoilCECrangedfrom
8to10.75emoYkgwithanaverageof9.05cmol/kg.Thepreserving-fertilityandacid—basebufferingcapacity
inthetestedsoilwasweak.
Keywords:vegetablesoil;soilacidification;CEC;exchangeableacid
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