添加石灰对西南喀斯特地区富硒土壤硒的赋存形态及高粱硒积累的影响

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关键词：石灰；富硒土壤；硒的形态；高梁硒积累；西南喀斯特地区

中图分类号：S511 文献标识码：A

文章编号：0439-8114（2026）02-0057-06

DOI：10.14088/j.cnki.issn0439-8114.2026.02.009 开放科学（资源服务）标识码（OSID）：□

Effects of lime application on selenium speciation in selenium-rich soil and selenium accumulation in sorghumin the Southwestkarst region

GUO Shuang-yan，YOU Qian， SHU Wen， ZHANG Jun-chen， ZHANG Nan，PAN Chang-bin，PAN Zi-ping （School ofResources and Environment，Moutai Institute，Renhuai 5645Oo，Guizhou，China）

Abstract：Aimigattheproblemofhighseleniumcontentbutlowbioavailabilityinselenum-richsoilintheSouthwestkarstregion，a potexperimentwasconductedwithtreatmentsofnolimeappication（CK）andfivelimeapplicationgradients（T1～T5，ading5，10， 20，30， 40g lime per 9 kg soil，respectively）to explore the efects on soil pH，seleniumspeciation transformation，selenium availability，and selenium uptake and accumulation in sorghum.The results showed that lime application increased soil pH ，promoted the transformationoforganicallcombinedseleniumtowatersolubleseleniumandexchangeableselenium，andincreasedthecontentf availableselenum insoil.Appropriatelimeaplicationsignificantlyenhancedtheaccumulationlevelsofselenuminsogmrots and grains，with the maximumincrease reaching 78.57% and 67.19% ，respectively.Correlationanalysis indicated that the contentof availableseleniuminsoilwasakeyfactoraffctingseleniumuptakeinsorghum，showingastrogpositivecorelationwithselenum contentirotsndgains.Teselenumcontentinotsadastrongnegaivecorelationiththecontentoforganicallyombiedelenium，whilethselenumcotentingainshdaeakcorrelationithoranicallyombiedselen.Intettedidicsele richsoil，applying 20～30g lime（per 9 kg soil） effectively improved the bioavailabilityof selenium and promoted seleniumaccumulationincrops，andinpracticalapplication，thisdosagerangecouldberefeedtoithadaptiveadjustmentsbasedontespcificacidiccharacteristics of the soil.

Key Words：lime;selenium-rich soil;selenium speciation;selenium accumulation in sorghum; Southwest karst region

硒是维持人类健康重要的微量元素，具有抗氧化、延缓衰老、防治癌症、拮抗重金属毒性等功效]人体主要通过饮食摄取硒2，而土壤是硒的主要储存库，因此，土壤中硒的富集水平对食物硒含量及人类健康起着重要的作用[3-5]。（剩余8949字）