弱碱性土壤中原位钝化联合叶面喷施ZnO对镉在不同品种小麦体内转运和积累的影响  

Effect of in situ Immobilization Remediation Combined with Foliar Spraying of ZnO on Transfer and Accumulation of Cd in Different Wheat Varieties in Weakly Alkaline Soil

作　　者：吴求刚 刘奇奇 刘笑生 赵恒 王新富 秦云虎 王彦君 章梅 周俊[3] WU Qiugang;LIU Qiqi;LIU Xiaosheng;ZHAO Heng;WANG Xinfu;QIN Yunhu;WANG Yanjun;ZHANG Mei;ZHOU Jun(Jiangsu Design Institute of Geology for Mineral Resources(Testing Center of China National Administration of Coal Geology),Xuzhou,Jiangsu 221006,China;Key Laboratory of Coal Resources and Mineral Resources,China National Administration of Coal Geology,Xuzhou,Jiangsu 221006,China;Key Laboratory of Soil and Sustainable Agriculture,Chinese Academy of Sciences,Nanjing 211135,China)

机构地区：[1]江苏地质矿产设计研究院(中国煤炭地质总局检测中心),江苏徐州221006 [2]中国煤炭地质总局煤系矿产资源重点实验室,江苏徐州221006 [3]土壤与农业可持续发展重点实验室(中国科学院),南京211135

出　　处：《土壤》2024年第6期1311-1318,共8页Soils

基　　金：徐州市重点研发计划(社会发展)项目(KC21149);江苏省碳达峰碳中和科技创新专项资金项目(BE2023855);江苏地质矿产设计研究院(中能化江苏地质矿产设计研究院有限公司)科技项目(JSY-2024-J01-1)资助。

摘　　要：为研究原位钝化联合叶面喷施ZnO对弱碱性土壤中镉(Cd)在不同小麦品种体内的转运和积累效应,本研究通过大田试验,评估了土壤施用铁尾矿和石灰、叶面喷施ZnO,以及两者联合应用对3个小麦品种籽粒中Cd积累的影响,并分析了土壤中Cd不同形态的变化及其在小麦不同部位间的转运和富集规律。研究发现,原位钝化联合叶面喷施ZnO有效降低了土壤Cd的生物有效性,进而减少了小麦籽粒中的Cd含量,尤其在对Cd积累能力较强的小麦品种中效果更为明显。相较于对照,各处理使小麦籽粒Cd含量分别降低了20.81%~31.67%、2.48%~11.39%和5.75%~10.92%。此外,原位钝化及其与叶面ZnO喷施的联合应用使土壤中Cd的有效态含量降低了7.19%~11.25%,且土壤pH提高了0.4~0.9个单位。结果还表明,该联合处理方法减少了Cd在土壤-小麦体系中的向上转运和积累,并在不同小麦品种中对Cd的转运和积累产生了品种依赖性影响。本研究为通过农艺管理措施减少小麦对Cd的积累提供了策略。In order to explore the effect of in situ immobilization remediation combined with foliar spraying of ZnO on the transport and accumulation of cadmium(Cd)in different wheat cultivars in a weakly alkaline soil.In this study,the effects of applying iron tailings and lime into soil,foliar spraying of ZnO,and the combination of the two on the accumulation of Cd in the kernels of three wheat varieties were evaluated through a field experiment,and the changes of different forms of Cd in the soil as well as its transport and enrichment patterns among different parts of the wheat were analyzed.It was found that in situ immobilization combined with foliar spraying of ZnO effectively reduced the bioavailability of soil Cd,which in turn reduced Cd content in wheat kernels,especially in wheat varieties with high capacity for Cd accumulation.Compared to the control,the treatments reduced Cd content in wheat grains by 20.81%-31.67%,2.48%-11.39%and 5.75%-10.92%,respectively.In addition,in situ immobilization and its combined application with foliar spraying of ZnO reduced the availability of Cd in soil by 7.19%-11.25%and increased soil pH by 0.4-0.9 units.The results also showed that the combined treatment reduced the upward translocation and accumulation of Cd in the soil-wheat system and had a variety-dependent effect on Cd translocation and accumulation in different wheat varieties.This study provides a strategy to reduce the accumulation of Cd in wheat through agronomic management practices.

关 键 词：小麦 原位钝化 叶面喷施 氧化锌 弱碱性土壤 镉污染 

分 类 号：X173[环境科学与工程—环境科学] S512[农业科学—作物学]